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Estimated Costs of Crop Production in Iowa - 2024
This publication estimates the cost of crop production in Iowa for 2024. Estimates for corn following corn, corn following soybeans, corn silage following corn, herbicide tolerant soybeans following corn, strip tillage corn and soybeans, non-herbicide tolerant soybeans following corn, low-till corn and soybeans, oats and hay production, alfalfa, grass pastures, and machinery costs are all included.
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$0.00
Carbon Science for Carbon Markets: Emerging Opportunities in Iowa
Credible carbon credits are a precondition for carbon markets. Unlike two decades ago, when voluntary carbon markets were just being developed, much is known today that supports credible carbon credits, including those that are agriculturally based. This report addresses ways to further improve the credibility of agricultural carbon credits and reduce the cost of carbon programs by assessing the underlying science and adding transparency to how carbon markets function. We assess the history and structure of carbon markets; carbon credit measurement, reporting, and verification protocols; the impacts of land—especially cropland—and livestock management practices on greenhouse gas and soil organic carbon dynamics, and adoption of these practices; existing and emerging engineering technologies that could reduce greenhouse gas emissions or enhance carbon removal; and quantitative tools that could help facilitate carbon market development. The geographic scope is primarily focused on the state of Iowa. The report furthermore highlights ways multisectoral collaborations—for example, between farmers, scientists, industry, government, and civil society organizations—could remove barriers and further market development.

The Carbon Sequestration Task Force was authorized on June 22, 2021, by Iowa Governor Kim Reynolds under Executive Order Number 9. Task A of this executive order states: "Reviewing the research on carbon sequestration, considering any gaps in current assessments, and determining whether new research, standards, or definitions should be developed."

As part of the analysis provided to the Task Force, researchers at Iowa State University (ISU) were asked by the Iowa Economic Development Authority (IEDA) to undertake an assessment of the science supporting agriculturally based carbon markets. This report includes the work of 51 faculty members, staff, postdoctoral associates, and graduate student scholars associated with four colleges, four institutes and centers, and 13 departments throughout ISU.
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$0.00
Iowa Crop Performance Tests - Soybean 2023
Results of soybean yield trials that are conducted annually by ISU and the Iowa Crop Improvement Association. Provides information farmers need to select the best varieties or brands for their production conditions.

Available from the Iowa Crop Improvement Association.
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Iowa Crop Performance Tests - Corn 2023
The Iowa Crop Performance Tests for corn is conducted each year to help farmers select the best hybrids for their production conditions.

Available from the Iowa Crop Improvement Association.
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Corn and Soybean Field Guide
This 236-page pocket-sized guide (3-3/4" x 6") combines corn and soybean integrated pest management information in one publication for ease of use by corn and soybean farmers, agronomists, and crop scouts.

Newly updated text and images provide the tools for identifying insects, diseases, and disorders of corn and soybean in the Midwest. The guide also contains information on developmental stages, pesticide decisions, and other production-related topics. This publication is constructed of durable, weather-safe materials to withstand regular use in the field.

Looking to purchase multiple copies? The guide is also sold in boxed quantities of 25 at a reduced price ($13/copy).
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Price
Publication
$15.00
PDF
$5.00
Corn and Soybean Field Guide (Unit=25)
This 236-page pocket-sized guide (3-3/4" x 6") combines corn and soybean integrated pest management information in one publication for ease of use by corn and soybean farmers, agronomists, and crop scouts.

Newly updated text and images provide the tools for identifying insects, diseases, and disorders of corn and soybean in the Midwest. The guide also contains information on developmental stages, pesticide decisions, and other production-related topics. This publication is constructed of durable, weather-safe materials to withstand regular use in the field.

Sold as a box of 25 copies ($13/copy) 

A digital version of the guide is available; see the single copy listing.
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Publication
$325.00
Using Manure Nutrients for Crop Production
Manure has characteristics that make nutrient management different and sometimes more complicated than fertilizer. Find out about manure nutrient availability for crops, manure nutrient supply, manure nutrient application recommendations, adjusting for manure nitrogen volatilization, and more.
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$0.00
2022 Summary - Agricultural Engineering/Agronomy Farm and Central Iowa Research Farms
This report contains a summary of the research conducted at the Agricultural Engineering/Agronomy Farm and Central Iowa Research Farms in 2022.

To access reports from past years, visit the Iowa State University Research and Demonstration Farms Progress Report archive.
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PDF
$0.00
2022 Summary - McNay Memorial Research and Demonstration Farm
This report contains a summary of the research conducted at the McNay Memorial Research and Demonstration Farm in 2022.

To access reports from past years, visit the Iowa State University Research and Demonstration Farms Progress Report archive.
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$0.00
A General Guide for Crop Nutrient and Limestone Recommendations in Iowa
Find phosphorus and potassium recommendations, micronutrient recommendations, and limestone recommendations for soils.

Also find soil test procedures and categories
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$2.50
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$0.00
2022 Summary - Northern Research and Demonstration Farm
This report contains a summary of the research conducted at the Northern Research and Demonstration Farm in 2022.

To access reports from past years, visit the Iowa State University Research and Demonstration Farms Progress Report archive.
[more]
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Price
PDF
$0.00
2022 Summary - Armstrong Memorial Research and Demonstration Farm Neely-Kinyon Memorial Research and Demonstration Farm
This report contains a summary of the research conducted at the Armstrong Memorial Research and Demonstration Farm and the Neely-Kinyon Memorial Research and Demonstration Farm in 2022.

To access reports from past years, visit the Iowa State University Research and Demonstration Farms Progress Report archive.
[more]
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Price
PDF
$0.00
2022 Summary - Northeast Research and Demonstration Farm
This report contains a summary of the research conducted at the Northeast Research and Demonstration Farm in 2022.

To access reports from past years, visit the Iowa State University Research and Demonstration Farms Progress Report archive.
[more]
Format
Price
PDF
$0.00
2022 Summary - Northwest Research and Demonstration Farm and Allee Demonstration Farm
This report contains a summary of the research conducted at the Northwest Research and Demonstration Farm and the Allee Demonstration Farm in 2022.

To access reports from past years, visit the Iowa State University Research and Demonstration Farms Progress Report archive.
[more]
Format
Price
PDF
$0.00
2022 Summary - Southeast Research and Demonstration Farm and Muscatine Island Research and Demonstration Farm
This report contains a summary of the research conducted at the Southeast Research and Demonstration Farm and the Muscatine Island Research and Demonstration Farm in 2022.

To access reports from past years, visit the Iowa State University Research and Demonstration Farms Progress Report archive.
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$0.00
Organic No-Till Production
Reduced tillage or no-till can provide multiple environmental benefits, particularly in the area of soil health, as well as reducing machinery, labor and fuel costs. With organic no-till, herbicides cannot be used to terminate cover crops, as is practiced in conventional no-till. Iowa State University has worked with the Rodale Institute (RI) in conducting research on organic no-till soybeans, corn and vegetables since 2005.
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$0.00
2022 Summary - Horticulture Research Station
This report contains a summary of the research conducted at the Horticulture Research Station in 2022.

To access reports from past years, visit the Iowa State University Research and Demonstration Farms Progress Report archive.
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$0.00
What to Expect: Establishing Prairie Vegetation on Your Farm
This publication informs Iowa farmers and landowners about the process and benefits of establishing small areas of perennial prairie vegetation to benefit soil health, water quality, and wildlife. Establishment of prairie vegetation takes both time and active management—this publication aims to help farmers and landowners set reasonable expectations while sharing consensus best management practices for successful establishment and management.
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$0.00
Governor’s Carbon Sequestration Task Force Summary Brief: Carbon Science for Carbon Markets
This is a summary document for the report Carbon Science for Carbon Markets: Emerging Opportunities for Iowa (CROP 3175) . Researchers at Iowa State University (ISU) were asked by the Iowa Economic Development Authority (IEDA) to undertake an assessment of the science supporting agriculturally based carbon markets. This report includes the work of 51 faculty members, staff, postdoctoral associates, and graduate student scholars associated with four colleges, four institutes and centers, and 13 departments throughout ISU.
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$0.00
Measuring Soil Organic Carbon: A Crucial Iowa Resource
This publication discusses how soil organic carbon has a wide range of crucial roles in agriculture. It impacts crop productivity, soil health, the movement of water, and removal of contaminants. Key themes of this publication include how soil organic carbon is closely related to soil organic matter, but the two are measured differently; soil organic carbon is linked to many aspects of soil health such as nutrient exchange, soil water holding capacity, and it provides great value on the farm; carbon markets are focused on changes in soil organic carbon stock that result from the application of new agricultural management practices; and the stock of soil organic carbon in a field is based on organic carbon concentration, depth of sampling, area of the field, and adjustments for other soil characteristics.
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$0.00
Spinach Production Under Midwest Growing Conditions
Spinach (Spinacia oleracea) is a cool-season leafy green that belongs to the Chenopodiaceae family, along with Swiss chard and beets. Native to Asia, spinach has been cultivated for over 2,000 years. Known for its nutritional benefits, popularized by the Popeye the Sailor Man cartoon in the United States, spinach is grown for both fresh market and processing. The United States is the second largest producer of spinach in the world, annually harvesting 960,600 pounds of spinach from 62,850 acres with a value of over $529 million.

This publication features a number of spinach cultivars and their differing characteristics, facts on planting and harvesting, pest management and disease prevention.
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$0.00
2021 Summary - Agricultural Engineering/Agronomy Farm and Central Iowa Research Farms
This report contains a summary of the research conducted at the Agricultural Engineering/Agronomy Farm and Central Iowa Research Farms in 2021.

To access reports from past years, visit the Iowa State University Research and Demonstration Farms Progress Report archive.
[more]
Format
Price
PDF
$0.00
2021 Summary - McNay Memorial Research and Demonstration Farm
This report contains a summary of the research conducted at the McNay Memorial Research and Demonstration Farm in 2021.

To access reports from past years, visit the Iowa State University Research and Demonstration Farms Progress Report archive.
[more]
Format
Price
PDF
$0.00
2021 Summary - Western Research and Demonstration Farm
This report contains a summary of the research conducted at the Western Research and Demonstration Farm in 2021.

To access reports from past years, visit the Iowa State University Research and Demonstration Farms Progress Report archive.
[more]
Format
Price
PDF
$0.00
2021 Summary - Armstrong Memorial Research and Demonstration Farm Neely-Kinyon Memorial Research and Demonstration Farm
This report contains a summary of the research conducted at the Armstrong Memorial Research and Demonstration Farm and the Neely-Kinyon Memorial Research and Demonstration Farm in 2021.

To access reports from past years, visit the Iowa State University Research and Demonstration Farms Progress Report archive.
[more]
Format
Price
PDF
$0.00
2021 Summary - Northern Research and Demonstration Farm
This report contains a summary of the research conducted at the Northern Research and Demonstration Farm in 2021.

To access reports from past years, visit the Iowa State University Research and Demonstration Farms Progress Report archive.
[more]
Format
Price
PDF
$0.00
2021 Summary- Southeast Research and Demonstration Farm and Muscatine Island Research and Demonstration Farm
This report contains a summary of the research conducted at the Southeast Research and Demonstration Farm and the Muscatine Island Research and Demonstration Farm in 2021.

To access reports from past years, visit the Iowa State University Research and Demonstration Farms Progress Report archive.
[more]
Format
Price
PDF
$0.00
2021 Summary - Northeast Research and Demonstration Farm
This report contains a summary of the research conducted at the Northeast Research and Demonstration Farm in 2021.

To access reports from past years, visit the Iowa State University Research and Demonstration Farms Progress Report archive.
[more]
Format
Price
PDF
$0.00
2021 Summary - Northwest Research and Demonstration Farm and Allee Demonstration Farm
This report contains a summary of the research conducted at the Northwest Research and Demonstration Farm and the Allee Demonstration Farm in 2021.

To access reports from past years, visit the Iowa State University Research and Demonstration Farms Progress Report archive.
[more]
Format
Price
PDF
$0.00
Midwest Cover Crops Field Guide 3rd Edition
The updated and expanded edition of this popular, 162-page guide includes nearly 30 pages of new material, including cover crop suggestions for common rotations, up-and-coming cover crop species, effects on yields, climate considerations, and more.

Producers who want to prevent soil erosion, improve nutrient cycling, sustain their soils, and protect the environment have been returning to a very old practice: planting cover crops.

Although farmers have been using cover crops for centuries, today's producers are part of a generation that has little experience with them. As they rediscover the role that cover crops can play in sustainable farming systems, many growers find they lack the experience and information necessary to take advantage of all the potential benefits cover crops can offer. That inexperience can lead to costly mistakes.

This guide will help you effectively select, grow, and use cover crops in your farming systems. While this guide isn't the final word on cover crops, it is meant to be a useful reference.

Available for purchase through Purdue University.
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National Organic Agriculture Directory
The National Organic Agriculture Expertise Directory was first published by Iowa State University in 2005 and was based on surveys sent to the Land-Grant University (LGU) in each state to determine the number of researchers and extension staff working in organic agriculture.

The greater number of faculty and staff working in organic ag in 2021 reflects the growing demand from producers interested in organic practices and the environmental solutions organic farming can offer. 123 LGU individuals from all 50 states self-identified as working in organic ag research and extension.

Previously known as SP 0273 - National Directory Organic Agriculture Expertise July 2005
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$0.00
Specialty Melons for High Tunnel Production
High tunnel production is on the rise in Iowa and the Midwest due to the benefits of season extension and the control over water and nutrient application. High tunnels, a passively heated hoop house where crops are usually planted directly in the soil, allow for an extension of the growing season and extended cash flow. This publication features the crop specialty melons as an alternative that can be used in high tunnel rotation in addition to tomato, pepper, cucumber, and salad greens.
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$0.00
Integrating poultry into an organic vegetable cropping system: benefits, challenges, and considerations
Commonly researched and implemented methods of crop-livestock integration in the United States include grazing livestock on cover crops, rotational grazing of permanent pasture, and grazing livestock on crop residues such as corn or wheat. A less space-intensive alternative for vegetable growers is the use of chickens introduced into a vegetable rotation. One of the advantages of vegetable-poultry integrated systems is the opportunity for an organic producer to integrate chicken production in the farm’s existing cropping system, where chickens provide natural fertilizer for crops. The addition of chickens, along with the already implemented cover crops, could move organic growers closer to their goals of relying upon on-farm produced inputs, or those produced nearby, and meet crop and livestock needs for feed and soil nutrition.
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$0.00
Current challenges in managing corn rootworm
Corn rootworm is a major corn pest in the United States and established throughout Iowa. With the commercial release of transgenic Bt-rootworm corn in 2003, many farmers reduced or eliminated soil-applied insecticides to manage larvae. However, western and northern corn rootworm are adapting to transgenic technologies throughout the Corn Belt. This publication will review the current status of Bt resistance by rootworm in Iowa and recommend management strategies for sustainable corn production.
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$0.00
Field Crop Production Handbook
The Field Crop Production Handbook provides a general overview of the essential aspects of producing field crops in Iowa. It focuses primarily on the basic activities of crop establishment, care, and harvest, as well as the associated impact of these practices on soil, water, and wildlife. The purpose of this book is to provide clarity to the non-farming public, educate agriculture students who may not have farming backgrounds, increase knowledge for those already working in agriculture, and to reach audiences not traditionally associated with agriculture.

Looking to purchase multiple copies? The Field Crop Production Handbook is sold in boxed quantities of 37 at a reduced price ($6/copy).

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Publication
$12.00
PDF
$6.00
Field Crop Production Handbook (Unit=37)
The Field Crop Production Handbook provides a general overview of the essential aspects of producing field crops in Iowa. It focuses primarily on the basic activities of crop establishment, care, and harvest, as well as the associated impact of these practices on soil, water, and wildlife. The purpose of this book is to provide clarity to the non-farming public, educate agriculture students who may not have farming backgrounds, increase knowledge for those already working in agriculture, and to reach audiences not traditionally associated with agriculture.

Sold as a box of 37 copies (only $6/copy!)

A digital version of the handbook is available; see single copy listing below.
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Price
Publication
$222.00
Post Corn Silage, Going to Corn: Use Cereal Rye
This publication is intended to provide a starting point for farmers who are new to cover crops. With experience, farmers may fine-tune the use of cover crops for their systems.
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PDF
$0.00
Post Corn Silage, Going to Soybean: Use Cereal Rye
This publication is intended to provide a starting point for farmers who are new to cover crops. With experience, farmers may fine-tune the use of cover crops for their systems.
[more]
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Price
PDF
$0.00
Crop Advantage - 2020 Series Proceedings
These proceedings feature summaries from workshops presented as part of the 2020 statewide Crop Advantage Series. Authors provide key points of their presentation, references for print and Internet materials, and illustrations to explain crop production and protection.

The publication also includes a list of Extension field agronomists and other resources offered to growers by Iowa State University Extension and Outreach.
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$0.00
An Economic Analysis of Two Iowa Crop Rotations
This publication compares the economic return to management of two crop rotations: conventional corn-soybean and organic corn-soybean-oat/alfalfa-alfalfa.

The publication details the production and market assumptions made and examines if these rotations are sustainable from a profitability standpoint.
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$0.00
Reducing Nutrient Loss: Science Shows What Works
Iowa has been working for decades to protect and improve water quality through best scientific management, land use, and edge-of-field practices to reduce nutrient loss from farmland.

The Iowa Nutrient Reduction Strategy is a science and technology-based framework to assess and reduce nutrients to Iowa waters and the Gulf of Mexico.
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$0.00
Online review course for the Iowa Certified Crop Adviser Examination
This course prepares individuals for the Iowa Certified Crop Adviser (CCA) Examination.

The course is divided into the four major exam competency areas. Within each competency area are modules that cover the subject matter. In total, there are 26 modules with nearly 8 hours of recorded programming. For individuals preferring text over audio, scripts are provided as an alternative.

Each module includes a practice quiz of up to 10 questions randomly selected from a pool of questions for that module. Users may take each quiz up to three times. A practice exam covering information from all the modules is also available. It consists of 100 randomly selected questions. The practice exam may be taken a maximum of three times.


Registration for the Iowa CCA examination is not included in the purchase price of this course. For examination information please visit the International Crop Adviser website.
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Price
Moodle eCourse
$100.00
Post Corn, Going to Soybean: Use Cereal Rye
This publication is intended to provide a starting point for farmers who are new to cover crops. It provides information on integrating cereal rye into a corn-soybean rotation.
[more]
Format
Price
PDF
$0.00
Post Soybean, Going to Corn: Use Oats
This publication is intended to provide a starting point for farmers who are new to cover crops. It provides information on integrating oats into a corn-soybean rotation.
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Price
PDF
$0.00
Green Gram and Black Gram: Small Grain Legume Crops for the Midwestern United States
Introducing new specialty crops that complement corn, soybean and cover crops can help improve soil health and provide enhanced long-term productivity and profitability. Green gram and black gram are examples of these specialty crops that are being tested at Iowa State University. This publication provides information on the crop themselves, as well as current Iowa State research.
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$0.00
Use of the End-of-Season Corn Stalk Nitrate Test in Iowa Corn Production
A comprehensive update of PM 1584 (Cornstalk Testing to Evaluate Nitrogen Management). This new publication details how to use the end-of-season plant test to provide information on nitrogen supply to corn for the season that just ended. It details how to sample and interpret test results in order to make more informed nitrogen application decisions.
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$0.00
Nitrogen Use in Iowa Corn Production
Nitrogen is essential for growth and reproduction of crops and is involved in many important plant biochemical processes. Nitrogen management is critical for optimal yields for corn production systems. This publication discusses long-term research done in Iowa and shows corn yields average about 60 bu/acre for continuous corn and 115 bu/acre for corn following soybean when corn is not fertilized. However, corn fertilized with N will easily yield 200 bu/acre or more. This means soil management and nitrogen fertilization practices, such as using economical optimum N rates, should be used to help optimize crop yields, use N efficiently, and enhance water quality.

The regional Corn Nitrogen Rate Calculator website, which has been helping farmers determine profitable nitrogen rates since 2005, can be found at: cnrc.agron.iastate.edu. This tool provides a process to calculate economic return to N application with different nitrogen and corn prices and to find profitable N rates directly from recent N rate research data. Using the Maximum Return to Nitrogen concept within the calculator helps farmers implement the most economical nitrogen rate inputs, which helps moderate water quality issues.
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$0.00
Corn Diseases
This fully revised booklet helps corn producers and other professionals in the agriculture industry identify and scout for corn diseases and provides general recommendations for management. Also included are illustrated disease cycles for primary diseases, a foliar disease estimation chart, and corn growth and development and staging information.

Looking to purchase multiple copies? Corn Diseases is also sold in boxed quantities of 50 at a reduced price ($3.50/copy).
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Publication
$5.00
PDF
$2.50
Soybean Growth and Development - Soybean Staging
Soybean Staging - Intended to be used as a quick reference handout for soybean staging. It is a supplement to the larger Soybean Growth and Development publication.

The secured PDF can be downloaded and viewed on your computer or mobile device, but not printed or edited.

Large quantity discounts (50 copies+) are available. To inquire, please contact us by email (extstore@iastate.edu) or calling (515)294-5247.
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Price
Publication
$2.00
PDF (Secured)
$2.00
Corn Growth and Development - Key Growth Stages
Key Growth Stages - Intended to be used as a quick reference for key times in corn growth and development. It is a supplement to the larger Corn Growth and Development publication.

The secured PDF can be downloaded and viewed on your computer or mobile device, but not printed or edited.

Large quantity discounts (50 copies+) are available. To inquire, please contact us by email (extstore@iastate.edu) or calling (515)294-5247.
[more]
Format
Price
Publication
$2.00
PDF (Secured)
$2.00
Corn Diseases (Unit=50)
This fully revised booklet helps corn producers and other professionals in the agriculture industry identify and scout for corn diseases and provides general recommendations for management. Also included are illustrated disease cycles for primary diseases, a foliar disease estimation chart, and corn growth and development and staging information.

Sold as a box of 50 copies ($3.50/copy)

A digital version of the guide is available; see the single copy listing.

[more]
Format
Price
Publication
$175.00
Nitrogen Extenders and Additives for Field Crops
This publication examines the use of nitrogen extenders and additives in field crops.
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PDF
$0.00
Grain & Oilseed Basics Module
This module is to acquaint you with various grains and oilseeds grown in the United States and discusses how the major grains (wheat and corn) and soybeans are handled, processed, and used in food, feed, and industrial markets. This grain module is brought to you by the Iowa Grain Quality Initiative and was produced by the former Crop Adviser Institute.

Click here to access the Grain & Oilseed Basics Module



Learning objective: Identify major grains and oilseeds. Understand the importance of production locations and harvest schedules in terms of both food safety and quality needs.

Introduction: This modules describes quality factors and typical production, harvest, and handling procedures for wheat, corn, and soybeans. It also describes small grains such as barley, rice and millet, as well as other types of oilseeds such as canola, sunflower, flax, and cottonseed.

Grains and oilseeds: Individual field loads are blended with those from other farms as they enter the marketing chain to be sold as a bulk commodity. Bulk commodities often pass through several handling facilities before reaching a user. At each point, grain lots are combined or divided as needed for efficient shipment to the next buyer.

USDA grade standards: Grains are traded as bulk commodities using USDA Grade factors. Grade factors are determined by either official inspectors of the Federal Grain Inspection Service (FGIS), or by the buyer as determined by purchase contract. Factors considered under the Grades are: test weight, broken or split kernels, foreign material, damage, and odor. Buyers and sellers may also specify other factors in their purchase contract. For example, wheat is normally traded on protein content, while most other grains have no composition specification.
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Corn Processing Module
This module is designed to help understand how corn is processed into food, feed, and industrial products and where potential food and feed safety problems may occur, and how corn processing fits into feed manufacturing. This grain module is brought to you by the Iowa Grain Quality Initiative, and was produced by the former Crop Adviser Institute.

Click here to access the Corn Processing Module



Learning objective: Identify types of corn processing, types of corn by-products used as feed ingredients, equipment used during corn processing, and any associated quality or feed safety concerns.

Introduction: Corn and corn by-products represent the largest single source of feed ingredients. Eighty percent of the United States corn crop is processed domestically into feed, food, or fuel. Each process has its own unique set of products and by-products, but all processors sell products into primary feed channels.

Corn by-products: Processing by-products - for example distillers grains, corn germ meal, corn gluten feed, and hominy feed — become ingredients in feed operations. Corn by-products that are used as livestock feed ingredients include dried distillers grains with solubles, syrup, and feed grade oil from the ethanol fermentation process. Other by-products that are commonly sold as feed ingredients are hominy feed from dry-milling and gluten meal and gluten feed from wet-milling.

Quality and feed safety: Physical hazards that could come in with grain during harvest are largely diminished by magnets and good management practices. Chemical hazards might be found in pesticide-treated seed that has been blended with field corn and delivered to the feed mill, or grain by-products might contain antibiotic residues from processing. Mycotoxins are also a significant hazard in grains and by-products. Feed ingredient quality is usually defined by USDA Grade factors or by contract specifications based on nutrient value.
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Wheat Processing Module
This module will recognize components of wheat processing prior to receipt at feed mill, identify classes of wheat and wheat by-products commonly used as livestock feed ingredients, list food safety hazards associated with wheat and wheat by-products and identify specialized equipment used to process wheat and wheat by-products. This grain module is brought to you by the Iowa Grain Quality Initiative, and was produced by the former Crop Adviser Institute.

Click here to access the Wheat Processing Module



Learning objective: Recognize components of wheat processing, identify classes and fractions of wheat, learn the specialized equipment needed, and understand potential food safety hazards.

Introduction: Wheat is sometimes fed as a grain to livestock in addition to being milled for flour. For pigs, it is ground, and for cattle it is steam-flaked. However, wheat is primarily grown for human consumption and is often not economically efficient to feed to livestock.

Processing: Wheat is processed into various grades of flour by cleaning, tempering, grinding, sifting, and purifying. Flour is sold to the baking industry.

Classes of wheat: The seven official classes of wheat are soft white, soft red spring, soft red winter, hard red winter, hard white, hard red spring, and durum. Classes are divided by hardness, color of kernels, and planting period. Each class has specific baking properties. The most common wheat by-products are wheat screenings and wheat middlings. The more fibrous and coarser fractions are used as animal feed ingredients. (Potential feed safety hazards associated with wheat or wheat by-products include non grain material, pesticides, chlorine, and vomitoxin.)

Equipment: Receiving separators, roller mills, sifters, and purifiers are important equipment in the wheat processing industry.
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Grain & Oilseed Risk Assessment Module
This module will introduce you to food safety hazards that may be present in the grain supply chain with a specific focus on grain and oilseeds. This grain module is brought to you by the Iowa Grain Quality Initiative, and was produced by the former Crop Adviser Institute.

Click here to access the Grain & Oilseed Risk Assessment Module



Learning objective: Be able to define risk management framework according to Food and Drug Administration (FDA) guidelines. Recognize sources of harm, risk, likelihood, and severity. Identify the occurrence of food safety risks and evaluate risk control strategies.

Introduction: Generally, grain and oilseeds do not have a lot of factors which make them high risk in terms of food safety. However, poor handling practices, weather issues, and improper storage procedures can increase the likelihood of certain hazards, notably mycotoxins.

Harm: The first part of risk is harm. Harm in grain can be classified in four ways: microbiological, chemical, physical, and the potential of an allergen (for food uses). Most microbiological hazards can be eliminated with heat treatment or processing. By law, chemically treated seed cannot be in the grain supply chain. Seeds leftover after planting must be disposed of according to specified protocols. Proper sanitation will prevent physical sources of harm and allergen potential. Mycotoxin management is the most complex risk issue in grains.

Severity estimates: The second part of risk is the level of severity. To measure severity, factors are number of deaths, the type of injury or disability, whether hospitalization was required, and whether the injury is permanent or temporary. Remember that grain and oilseeds contribute to raw ingredients for hundreds of human and animal products.

Supporting information:
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Rendered Ingredients Module
This module identify rendered ingredients, list the component steps of the rendered process prior to receipt at the feed mill, identify specialized equipment used to process rendered ingredients, and list hazards associated with rendered ingredients. This grain module is brought to you by the Iowa Grain Quality Initiative, and was produced by the former Crop Adviser Institute.

Click here to access the Rendered Ingredients Module



Learning objective: Identify ingredients, the steps of the rendering process, specialized equipment, and associated hazards.

Introduction: The rendering industry is vital to the sustainability of the animal feed industry. It provides the utilization of products that would be otherwise unused as feedstuffs. Common rendered ingredients include: feather meal, poultry meal, meat and bone meal, blood meal, spray dried animal plasma, fish meal, poultry fat, beef tallow, choice white grease, and yellow grease.

Rendering process: The rendering process includes receiving feedstuffs and by-products, sorting them into similar sizes, and press cooking them to separate fats prior to grinding. Of these steps, the cooking process is most pivotal.

Equipment: Specific equipment used in rendering includes sizing equipment, cookers, a feed press, and hammer mills.

Potential: Potential feed safety hazards include physical products, cleaning chemicals, and potential microbial risks inside slaughter or rendering facilities. The Rendering Code of Practice minimizes these risks in a preventative manner so that rendered ingredients pose a low animal feed or human food safety risk.
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Non-Grain By-Product Ingredients Module
This module identify common non-grain by-product ingredients, recognize the origin of non-grain by-product ingredients prior to receipt at the feed mill, identify specialized equipment used to process non-grain by-product ingredients, and recognize hazards associated with non-grain by-product ingredients. This grain module is brought to you by the Iowa Grain Quality Initiative, and was produced by the former Crop Adviser Institute.

Click here to access the Non-Grain By-Product Ingredients Module



Learning objective: Identify common non-grain by-product ingredients, the origin of ingredients, specialized equipment used, and associated hazards.

Introduction: Originally, non-grain by-products were intended for human consumption, however they are now utilized in nutrient composition for animals. Typically high in energy and protein and concentrated in vitamins and minerals, the most common non-grain by-products are spray-dried whey, citrus pulp, bakery by-product, bread meal, cake meal, and potato meal.

Processing: Processing steps vary based on the product, but usually include a drying process, typically spray-drying, and hammer milling to create a consistent particle size. Hammer mills, spray-dryers, and screw presses are common equipment used during this process.

Potential hazards: Animal or human health risks from non-grain by-products are low, but can come from physical hazards found in facilities like wood, metal or insect pieces. Other potential hazards may include pesticides in citrus by-products, cleaning substances, mycotoxins from molds, and oxidation products. From a risk assessment perspective, none of these hazards pose substantial risk to either animal or human health.
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Medicated Feed Additives and Other Regulated Ingredients Module
The module for medicated feed additives and other regulated ingredients cover: the classification structures for medicated additives and medicated feeds, the identification of other regulated ingredients, and the roles of current good manufacturing procedures, or cGMPs, in both feed safety and hazard prevention. This grain module is brought to you by the Iowa Grain Quality Initiative, and was produced by the former Crop Adviser Institute.

Click here to access the Medicated Feed Additives and Other Regulated Ingredients Module



Learning objective: Describe the classification structures for medicated additives and medicated feeds, and the roles of current good manufacturing procedures, or cGMP’s, in both feed safety and hazard prevention.

Introduction: A major consideration in feed manufacturing is proper use and documentation of regulated feed ingredients and additives. There are cGMP regulations for medicated feeds. The purpose of the cGMPs is to promote both the consistency and quality of the medicated feeds. cGMP for non-medicated feeds take effect in September 2016.

Additives: Medicated feed additives are fed to animals for nutritional purposes, medicinal purposes, to prevent, treat, or control bacterial infections, coccidiosis, and worms, and to prevent mortality. Overall, they are used to improve the health and productivity of animals.

Classification: Medical feed additives are classified by type; A, B, or C, and category; I or II. The type refers to the usage of medicated feed. Type A medicated additives are referred to as drug premixes and are used to create Type B or C. Type B medicated additives create a medicated supplement that can be mixed to create Type C. Type C medicated additives are fed as complete feeds directly to the animal. Categorization of medicated feed additives is based on preventing drug residues in processed animal tissues after a withdrawal period. Category I are additives that do not require a withdrawal period. Category II are additives that do require a withdrawal period.
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Production Animal Digestion and Nutrition Module
Not every type of animal can adequately process and utilize the nutrients in all types of feedstuffs. This presentation will provide a brief overview of the various digestive systems found in production animals. This grain module is brought to you by the Iowa Grain Quality Initiative, and was produced by the former Crop Adviser Institute.

Click here to access the Production Animal Digestion and Nutrition Module



Learning objective: Understand ruminant, avian, or non-ruminant animal digestive systems. Identify key nutrients, and potentially hazardous feed ingredients.

Introduction: Animals process and utilize nutrients in all types of feedstuffs differently based on their digestive system and life stage. There are several variations in digestive systems that limit what an animal can or cannot use for nutrition.

Digestion: A monogastric digestive system is characterized by a simple, glandular stomach. Humans, pigs, and birds have a monogastric digestive system. Members of the equine family are hindgut fermenters due to their enlarged hindgut. Cattle, sheep, and goats have a ruminant digestive system which is characterized by a four compartment stomach.

Nutrition: The basic nutrients of a balanced diet are carbohydrates, fats, proteins, minerals, and vitamins. Water is not a nutrient, but is essential to life. Carbohydrates are utilized for energy, growth, and fat. Protein is especially important in young, growing animals as well as high producing adult animals. Minerals are distributed throughout the body and are needed in small amounts. Vitamins are responsible for tissue respiration, blood formation, and the well-being of the immune system.
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Production Animal Feed Formulation Module
The module will identify personnel responsible for production animal feed formulation, identify differences in diet formulation between species of animals and phase production within a species, and compare principles of least-cost formulation to other methods of feed formulation. This grain module is brought to you by the Iowa Grain Quality Initiative, and was produced by the former Crop Adviser Institute.

Click here to access the Production Animal Feed Formulation Module



Learning objective: Identify personnel, differences in diet between species, and compare principles of least-cost formulation to other methods of feed formulation.

Introduction: With one billion tons of animal feed produced worldwide annually, the industry needs individuals who understand feed formulation. An animal’s nutrient requirements are constantly fluctuating due to changes in genetics and the animal’s physiological state.

Species feeding: Animal species is the most influential factor in dictating nutrient needs. Chickens and pigs are fed corn based diets and ruminants are fed roughage based diets. All production animals have diets that contain vitamins, trace minerals, and salt. The specifics of nutrient requirements in diets by species are known and form the basis for feed formulation.

Phase feeding: Feed programs must meet nutritional requirements based on the animal’s stage of growth or production, genetic capacity, health, and facilities. There are different diets for various physiological states, but constantly changing diets can lead to errors in feed manufacturing. Nutritionists should consider costs, nutrient requirements, and practicality regardless of species or growth phase.

Least-cost formulation: To formulate a least-cost diet, the formulation team must look at the ingredient cost, the nutrient composition, and the animal’s nutrient requirements. Nutritionists often decide to not feed least-cost diets and instead choose diets that will minimize excreted nutrients.
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Quality Assurance and Safety Module
The module will identify the individual responsible for quality assurance and feed safety in feed manufacturing, recognize the difference between hazard identification and hazard analysis, and identify the steps involved in a feed recall. This grain module is brought to you by the Iowa Grain Quality Initiative, and was produced by the former Crop Adviser Institute.

Click here to access the Quality Assurance and Safety Module



Learning objective: Recognize the difference between hazard identification and hazard analysis. Identify the steps involved in a feed recall.

Introduction: The goal of feed quality assurance and feed safety programs is to provide a feed that is wholesome and nutritionally adequate. The feed mill manager and a team of specialists work to complete the desired level of feed and quality safety. Recent implementation of the Food Safety Modernization Act has required mills and other processors to have formal hazard analysis protocols.

Hazard identification: Hazard identification is the process of identifying a potential contaminant in food and classifying it as a physical, chemical, or biological hazard. It is a qualitative step that involves listing potential hazards within the mill and how those hazards entered the facility.

Hazard analysis: A hazard analysis evaluates hazards through collecting quantitative historical information. The analysis will show which hazards are significant and must be addressed in the feed safety plan. Hazards are assessed on severity, occurrence, history, and the likelihood of future occurrences.

Feed recalls: Even with proper hazard identification and analysis, programs can still fail. Recall steps are important to ensure feed quality and safety. Reasons for the recall must be clearly stated along with the discovery method.

Supporting information:
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Sanitation and Pest Management Module
The module will identify the components of a pest control program, including personnel and preventative practices used to reduce pests, identify individuals responsible for sanitation of specific process centers within the feed manufacturing facility. This grain module is brought to you by the Iowa Grain Quality Initiative, and was produced by the former Crop Adviser Institute.

Click here to access the Sanitation and Pest Management Module



Learning objective: Identify components of a pest control program, individuals responsible for sanitation, common pests, associated hazards, and methods of pest control in a feed and grain facility.

Introduction: The only way to keep pests from entering the grain chain is a strong sanitation program. Feed mill managers are primarily responsible for developing a sanitation schedule, based on mill design, that includes storage of incoming ingredients, equipment management, and feed transportation. Pests include mice, rats, birds, and other rodents.

Integrated pest management (IPM): The key to successful IPM starts with inspection. Every facility should have an inspection checklist customized to detect and correct issues as they emerge. Inspections and monitoring help define the presence, numbers, and spread of infestations. Periodic examination of monitoring data will indicate the benefits of IPM. Pest control is also a major element of the Food Safety Modernization Act Good Manufacturing Practices.

Food safety hazards: Physical hazards include the bodies or excreta of pests themselves. Chemical hazards involve pesticides or cleaners. Good manufacturing practices separate chemicals from feed so contamination does not occur. Biological hazards may occur if pests are carrying microbial pathogens, or if wet cleaning processes are used and equipment is not completely dry.

Supporting information:
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Beef Industry Module
The learning objectives are as follows: Recognize how the beef cattle industry is divided and name key personnel in each division. Differentiate between management strategies at each stage of beef cattle production. Explain different feeding practices for each life stage within the beef cattle industry. List major diet components used for beef cattle for each life stage. This grain module is brought to you by the Iowa Grain Quality Initiative, and was produced by the former Crop Adviser Institute.

Click here to access the Beef Industry Module



Learning objective: Recognize how the beef industry is organized and explain different feeding practices for each life stage. Learn common diet components used for beef.

Introduction: Typically, beef cattle start on a cow-calf operation. After weaning they may be sent to a backgrounder operation, then to a feedlot.

Cow-calf operations: The goal of a cow-calf operation is to maintain a herd of healthy cows that will produce healthy calves each year. Calves are separated into replacement heifers and breeding bulls to be retained within the herd, with the bulk of calves sent to backgrounders or feedlots.

Backgrounder: Calves may be sent to a specialized backgrounding facility to acclimate them to the feedlot lifestyle. Not all producers choose to utilize this stage.

Feedlot: Feedlot operations add muscle and fat to the cattle through an energy dense diet until they are ready for harvest.

Harvesting and packing: The final phase is harvesting and packing. This is where the animal is processed into products desired by consumers.

Supporting information:
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Dairy Industry Module
The learning objectives discussed: Recognize how the dairy cattle industry is divided. Sequentially list the stages of dairy cattle production and how various dairy cattle production animals are managed at each production stage. Explain different feeding practices for each life stage within the dairy cattle industry. Describe major diet components used for dairy cattle for each life stage. This grain module is brought to you by the Iowa Grain Quality Initiative, and was produced by the former Crop Adviser Institute.

Click here to access the Dairy Industry Module



Learning objective: Recognize how the dairy industry is organized. Describe the different stages of production, management practices, types of housing, and feeding practices.

Introduction: The dairy industry not only provides dairy products, but also accounts for 20 percent of the beef industry. Large-scale operations house over 2,000 head of dairy cattle and make up 30 percent of the dairy industry. Small-scale operations make up 2 percent of the dairy industry.

Housing: There are a variety of housing options for dairy producers depending on the size of the herd and the amount of land available. Options may include tie stalls for very small herds, grazing and dry lots for large herds, or covered barns for herds of various sizes

Nutrition: Newborn calves will be fed colostrum and then milk. Within several days, they will be offered small amounts of concentrate to teach them how to eat solid food. After weaning, calves are introduced to a diet that includes forages and protein supplements to support growth. Bred heifers and lactating cows require the most nutrients and energy compared to others in the herd. Dry cows are in a period of maintenance and require a lower quality diet.

Milking systems: Tie-stall and parlor milking systems are commonly used throughout the dairy industry. Tie stall systems are used in smaller operations, are portable, and can be brought to the cattle. Parlor systems are housed in a separate area of the barn that is reserved for milking.

Supporting information:
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Poultry Industry Module
The learning objectives are as follows: Recognize how the poultry industry is divided. Describe how various production poultry are managed. Explain the different types of housing used for poultry production. Explain the different feeding practices for each life stage within the poultry industry. List major diet components used for poultry production for each life stage. This grain module is brought to you by the Iowa Grain Quality Initiative, and was produced by the former Crop Adviser Institute.

Click here to access the Poultry Industry Module



Learning objective: Understand the organization of the poultry industry. Describe the different types of housing used for poultry production, and feeding practices used for each life stage.

Introduction: With more research and development in technology used to operate poultry production, farms have become more automated. Millions of birds can be managed by a small number of people.

Broiler production: All broiler houses include systems for ventilation, heating, lighting, brooding, feeding, watering, litter, waste, and carcass disposal (in event of diseases). Feeding is split into three rations; the grower ration, the finisher ration, and the withdrawal ration. Diets contain 85 percent corn and soybean meal plus specific premixes.

Layer production: There are three types of egg production systems; in-line, off-line, and niche market. Hens are fed a formulated mash or pelleted feed. The nutrition of laying hens greatly affects the quality of eggs produced. Feed intake may decrease for various reasons such as weather extremes, vaccinations, beak trimming, and decreased light hours.

Turkey production: There are three types of turkey production systems; heritage, commercial, and backyard. Two common housing options for turkeys are range and confinement. The diet fed to turkeys should not be restricted, this can cause cannibalistic behaviors. Turkey feed consists primarily of corn, soybean meal, fat, and premixes.

Supporting information:
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Swine Industry Module
The learning objectives are as follows: Recognize how the swine industry is divided. Differentiate between management strategies at each stage of swine production. Explain different types of housing used for swine production. Explain different feeding practices for each life stage within the swine industry. Describe major diet components used for swine for each life stage. This grain module is brought to you by the Iowa Grain Quality Initiative, and was produced by the former Crop Adviser Institute.

Click here to access the Swine Industry Module



Learning objective: Understand how the swine industry is organized. Differentiate between management strategies and housing types used in swine production.

Introduction: The swine industry is highly integrated and has found many non-meat uses for swine by-products. In order to protect animals and keep food and by-products safe, swine operations have high biosecurity measures in place.

Animal flow: There are two major animal flow processes utilized in the swine industry: continuous and all-in-all-out. Continuous operations constantly have pigs moving into, within, and off the operation. All-in-all-out operations will completely empty housing facilities for cleaning and disinfecting before the next group of pigs arrive.

Personnel: Personnel required on a grow/finish operation include a farm site manager and a stockperson. The personnel required for a farrowing operation includes a sow farm manager, a breeding and gestation lead, a farrowing lead, and a nursery lead with stockpersons working under each lead position. A farrow to finish site will have each of the employees required for grow/finish and farrowing operations.

Housing types: Pigs can be housed in confinements or outdoors. Confinement housing is in climate controlled buildings that have proper temperature, ventilation, and lighting. Outdoor housing for swine consists of outdoor pens and hoop buildings that provide shelter from harsh weather conditions. The labor input for outdoor facilities is much higher, and the growth and conception rates are lower than those in confinement operations.

Supporting information:
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Corn Growth and Development - Corn Staging
Corn Staging - Intended to be used as a quick reference handout for corn staging. It is a supplement to the larger Corn Growth and Development publication.

The secured PDF can be downloaded and viewed on your computer or mobile device, but not printed or edited.

Large quantity discounts (50 copies+) are available. To inquire, please contact us by email (extstore@iastate.edu) or calling (515)294-5247.
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Soybean Growth and Development - Key Growth Stages
Key Growth Stages - Intended to be used as a quick reference for key times in soybean growth and development. It is a supplement to the larger Soybean Growth and Development publication.

The secured PDF can be downloaded and viewed on your computer or mobile device, but not printed or edited.

Large quantity discounts (50 copies+) are available. To inquire, please contact us by email (extstore@iastate.edu) or calling (515)294-5247.
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Dryeration Module
Dryeration increases energy efficiency by 15 to 30 percent compared to high temperature drying with immediate cooling. This grain module is brought to you by the Iowa Grain Quality Initiative and was produced by the former Crop Adviser Institute.

Click here to access the Dryeration Module



Learning objective: Understand the dryeration process, review the equipment needed, and learn effective management strategies to carry out the dryeration process.

Introduction: High temperature drying is halted when grain is slightly above the finished moisture content target. Hot grain is moved from the dryer to a separate bin to steep before cooling. Additional moisture is removed during the cooling process and the cooled grain is then transferred to storage.

Equipment: Some equipment modification is needed for dryeration. A high temperature dryer will do the majority of the grain drying but a separate dedicated bin for steeping and cooling the grain is also needed. Additionally, extra conveyers are needed to move the hot grain to the cooling bins and the cool grain to storage, with controls to manage the cooling fans and conveyers.

Management tips: Stop the dryer and transfer the hot grain 2 to 3 percent points above the desired moisture content. Allow the hot grain to steep at least four hours, then cool the grain and transfer it to storage. Check the finished moisture content and adjust the drying time as needed.

Supporting information:
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Aeration Module
A look at how to maintain stored grain in good, quality condition, we’ll see how three different conditions interact to cause grain spoilage problems. This grain module is brought to you by the Iowa Grain Quality Initiative and was produced by the former Crop Adviser Institute.

Click here to access the Aeration Module



Learning objective: Understand the function of aeration in preventing grain spoilage. Learn to establish a grain quality monitoring system with frequent temperature checks to prevent spoilage.

Introduction: In order to maintain grain in good quality condition, it’s important to avoid storage problems. There are three areas to focus on: moisture, temperature, and time. Holding grain that is too wet, too warm, or for too long can cause problems. This module explains how those three different conditions interact to cause grain spoilage. In addition, the accumulation of fines can promote spoilage or restrict airflow. This module will present solutions, including how aeration prevents uneven grain temperatures during moist conditions in storage, and the importance of checking grain while it is in storage to prevent small problems from developing into large ones.

Moisture: Fungi and other spoilage organisms grow best at or above 65 percent relative humidity. The air within stored grain should stay below 65 percent relative humidity if possible to prevent spoilage. For wetter corn, temperature becomes the primary control factor.

Temperature Control: Moisture migration can cause crusting or spoilage at the top of the bin near the center. Moisture migration can be prevented by cooling the grain with aeration fans. Aeration fans create a negative pressure system pulling cool air down through the grain or a positive pressure system by pushing cool air up through the grain. There are a variety of electronics available to measure grain temperature and monitor the aeration process.

Checking Grain Storage: Stored grain needs to be checked to monitor grain quality. During the winter months, checking every other week is adequate. Checking once per week during summer, spring, and fall is recommended. Safety should be a priority when checking stored grain. Depending on the severity of the spoilage, correcting a storage problem can be done by aeration fans or grain removal.

Supporting information:
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Fan Performance Module
As we look at using fans for drying and storage of grain, it's important to know what performance those fans are giving and what performance is needed in-order to select an appropriate fan for a drying or storage bin. This grain module is brought to you by the Iowa Grain Quality Initiative and was produced by the former Crop Adviser Institute.

Click here to access the Fan Performance Module



Learning objective: Understand the fan performance provided to cool grain and learn the requirements for fan selection.

Airflow Rate Requirements: For high temperature bin drying, anywhere from 2 to 6 cubic feet of air per minute per bushel (cfm/bu) is needed. In natural air drying 1 to 3 cfm/bu is used. For aeration of stored grain, 0.1 to 0.5 cfm/bu is needed.

Equipment: Typically a fan is used to push air up through the grain, creating a positive pressure system. The fan pressurizes the flow beneath the grain. The amount of static pressure (resistance) needed to achieve a certain airflow rate depends on the type of grain, the grain depth, and the airflow rate.

Fan Types: There are several types of fans. The two most commonly used fans are vane axial fans and centrifugal fans. Vane axial fans are less expensive, create higher airflows at lower pressure, and are loud. Centrifugal fans are quiet in nature, and are usually more efficient above 4 inches of static pressure.

Fan Selection: The number of bushels in the bin and the desired airflow rate determine fan selection.
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Grain Drying Economics Module
Climate conditions in the upper Midwest states make it necessary for most corn harvested for grain to be dried artificially. Grain producers are faced with a variety of choices when it comes to marketing their crop. This grain module is brought to you by the Iowa Grain Quality Initiative and was produced by the former Crop Adviser Institute.

Click here to access the Grain Drying Economics Module



Learning objective: Understand the economic components of drying grain.

Cost of drying corn on-farm: The cost of drying corn on the farm depends on the size and type of drying system, the amount of moisture in the corn, weather conditions, and the costs of labor, electricity, and drying fuel.

Wet grain at harvest: When grain is wet at harvest, there are several considerations to make in addition to the time of harvest. Most grain buyers assess moisture discounts and commercial elevators charge a drying cost for wet grain.

Other corn drying considerations: Both moisture level and temperature of the grain should be considered.

Storage time: The cooler the grain temperature, and the lower the moisture content, the longer the storage time is for both corn and soybeans.

Supporting information:
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Grain Storage Economics Module
Storage is a primary method to ration the use of commodity corn and soybeans once harvested, throughout the marketing year. This grain module is brought to you by the Iowa Grain Quality Initiative and was produced by the former Crop Adviser Institute.

Click here to access the Grain Storage Economics Module



Learning objective: Understand the variables to consider when deciding to store grain or sell immediately after harvest.

Cost of grain ownership: Initial costs after harvest include maintaining quality, transporting bushels to a point of sale, or processing the bushels for livestock on the farm. Quality deterioration is inevitable when storing grain for any length of time, especially if it is not properly dried after harvest. By the spring months, commercial storage costs exceed on-farm storage costs. Interest on debt against on-farm storage facility or debt on borrowed funds could be reduced by selling the grain immediately.

Storage considerations: On-farm drying of grain will extend maximum storage time - 13 to 14 percent moisture, allowing grain to be stored for 6 to 12 months after harvest. Corn sold commercially is adjusted to 15 percent moisture for delivery of sale and 14 percent moisture for bushels placed under warehouse receipt. Cooling the grain to temperatures of 40°F or lower can extend storage time significantly. As it dries the grain will shrink causing fewer bushels to be marketed.

Supporting information:
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Mycotoxins 1: Mycotoxin Development Module
This module will discuss mycotoxins and their significance for grain and feed industries. This module covers mycotoxin production by various fungal species and the impact of mycotoxin contamination in animal feed. This grain module is brought to you by the Iowa Grain Quality Initiative and was produced by the former Crop Adviser Institute.

Click here to access the Mycotoxins 1 Module



Learning objective: Learn management practices for testing mycotoxin contamination, and preventing the production of mycotoxins. Understand the relationship of fungi in the environment to mycotoxin production. Recognize harmful levels and effects of certain mycotoxins on humans and animals.

Introduction: Mycotoxins are chemical compounds produced by some fungi. They contaminate crops worldwide. There are five mycotoxins typically of concern in US grains; aflatoxins, fumonisins, ochratoxin A, deoxynivalenol (vomitoxin), and zearalenone.

Development: Not all fungi produce mycotoxins, and those capable of producing mycotoxins do not always do so. Climate, weather, plant health, development stage, and the timing of these interacting factors govern the risk for both fungal and mycotoxin contamination. Mycotoxins are stable compounds, so once they are in a product they are hard to remove.

Harmful levels: Action levels for aflatoxin range from 20 ppb in general commerce, up to 300 ppb in grain intended for beef cattle. Advisory levels for deoxynivalenol have been established as well as guidance levels for fumonisins. The FDA does not currently have action, advisory, or guidance levels for zearalenone or ochratoxin A.
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Mycotoxins 2: Best Practices in Handling and Testing Module
This module will focus on sampling and analysis of grains for mycotoxins, factors that influence the contamination of stored grains with mycotoxins, and options for handling and use of contaminated grain. This grain module is brought to you by the Iowa Grain Quality Initiative, and was produced by the former Crop Adviser Institute.

Click here to access the Mycotoxins 2 Module



Learning objective: Understand the best management practices for mycotoxin testing, for preventing the further production of mycotoxins, and for handling contaminated grain.

Introduction: Mycotoxins are chemical compounds produced by some fungi that contaminate crops worldwide. There are five mycotoxins typically of concern in US grain; aflatoxins, fumonisins, ochratoxin A, deoxynivalenol (vomitoxin), and zearalenone. Mycotoxins are difficult to manage in harvested grain.

Sampling and analysis: Sampling, sample preparation, and analysis are the primary components of a mycotoxin testing procedure. The collected sample must be representative of the lot being tested. Samples are prepared by grinding and mixing the sample, followed by representative subdivision to an analysis sample. Analyses are made using a variety of methods, some examples include high-performance liquid chromatography (HPLC), rapid test kits, or thin-layer chromatography (TLC).

Handling contaminated grains: Grain handling and processing facilities should have an informed strategy that is proactively preventing excessive mycotoxin contamination in the food and feed chain. It should be an organized plan that is communicated to, and understood by, the relevant employees at the facility.
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Oilseed Processing Module
Oilseeds and their by-products are valuable ingredients for livestock and poultry. This module will identify components of oilseed processing prior to receipt at feed mill, identify common oilseeds and by-products, list hazards associated with oilseeds and by-products, and identify specialized equipment used to process oilseeds and by-products. This grain module is brought to you by the Iowa Grain Quality Initiative, and was produced by the former Crop Adviser Institute.

Click here to access the Oilseed Processing Module



Learning objective: Identify common oilseeds and oilseed by-products, learn the components of the oilseed process, explore the specialized equipment needed, and identify potential hazards.

Introduction: Oilseeds and their by-products are valuable ingredients for livestock and poultry. Common oilseeds are sun¬flowers, safflowers, canola, flax, and soybeans. The oil produced is usually used for human consumption, but soybean oilseed meal is most often used in animal feed.

Oilseed processing: Oilseed processing is done by solvent extraction. Multiple steps are taken to remove the hull, flake the meat, extract and refine the oil, and then process the remaining meal appropriately.

Equipment: Specific equipment used during oilseed processing includes: dehullers, flakers, extractors, centrifuges for refinement, the Desolventizer Toaster Dryer Cooler (DTDC) machine, and hammer mills.

Potential hazards: The potential feed safety hazards associated with oilseeds and their by-products include non-grain material, solvent residues, grain chemicals, and mold. However, potential feed safety hazards present a very low risk to animal and human health if consumed.

This module was created at Kansas State University as part of a cooperative agreement with the Food and Drug Administration for food safety inspector training.
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Crop Rotations, Composting and Cover Crops for Organic Vegetable Production
Organic production and consumption has increased to a $39.5 billion industry in the United States with over 22,000 organic farmers. Over 5.4 million acres are in organic production in the U.S., including 164,403 acres of organic vegetables, valued at $1.3 billion. The majority of organic vegetable growers incorporate crop rotations, composting, and cover crops in their operations. The following information offers a guide for including these practices to meet certified organic rules and increase the long-term sustainability of an organic farm.
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Hail on Corn in Iowa
This publication shows how to obtain an estimate of the potential yield loss from hail injury to corn. It describes the methods used to quantify injury and stand loss, as well as corn growth stages, which are an important part of the yield loss estimation process. Information on fungicide use on hail-injured crops, replanting severely injured stands, and weed management after hail are also included. CSI

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Bacterial Leaf Streak of Corn
Bacterial leaf streak, caused by Xanthomonas vasicola pv. Vasculorum, was recently identified in Iowa. The disease has been found in field corn, seed corn, popcorn and sweet corn. Based on what we know about other bacterial diseases, the pathogen that causes bacterial leaf streak likely survives in corn residue and is spread by wind and rain/irrigation. The impacts on corn yield production are yet to be determined.

For additional information, please visit the Integrated Crop Management News website.
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Building Soil Health
This soil health management publication provides an overview about soil functions and services that are essential for sustainable agriculture systems. The research-based information in this publication highlights the relationships between soil properties that are easy to understand and useful to all, including farmers, agronomists, agricultural consultants, soil scientists, technical service providers, and extension educators.

This publication is the product of the collaborative efforts of Iowa State University and the Department of Natural Resources Conservation Service (NRCS) in Iowa.

To allow for this publication to be distributed to as many people possible, the limit is one copy per order.

We appreciate your cooperation with this request.
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A Farmer's Guide to Corn Diseases
A Farmer’s Guide to Corn Diseases provides an overview of the corn diseases that currently occur in the United states and Canada, with an emphasis on diagnosing diseases in the field. Information for each disease includes symptoms and signs, conditions that favor disease, similar looking diseases and disorders, and a review of basic management options. The book also contains a diagnostic key and disease distribution maps.

Published by APS Press, A Farmer’s Guide to Corn Diseases was developed by Iowa State University in partnership with several other universities.

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A Farmer's Guide to Soybean Diseases
A Farmer’s Guide to Soybean Diseases provides an overview of the soybean diseases that currently occur in the United States and Canada, with an emphasis on diagnosing diseases in the field. Information for each disease includes symptoms and signs, conditions that favor disease, similar looking diseases and disorders, and a review of basic management options. The book also contains a diagnostic key and disease distribution maps.

Published by APS Press, A Farmer’s Guide to Soybean Diseases was developed by Iowa State University in partnership with several other universities.

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Getting to Know the Insects
Insects are the most abundant and diverse group on the planet, more than all other animals and plants combined. To date, more than one million species have been described with more being discovered every year. This publication will help you have a better understanding of insect identification, biology, and pest management.
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$2.00
Iowa Cover Crop Resource Guide
A cover crop is a plant grown to protect and enrich soil when the soil would otherwise be bare. Historically, cover crops were used by ancient Greek, Roman, and Chinese farmers thousands of years ago and, more recently, by colonial settlers on the Eastern seaboard of the United States. Decades of research on cover crop usage across the United States is available and a renewed interest has been given to cover crops’ ability to reduce some of the environmental impacts of row crop agriculture, particularly in regards to erosion and nutrient loss prevention.
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$0.00
Preventive Maintenance
The module will recognize individuals responsible for preventive maintenance for specific feed manufacturing equipment and processing centers, identify how suggested preventive maintenance requirements and frequency for specific feed manufacturing equipment are developed. This grain module is brought to you by the Iowa Grain Quality Initiative, and was produced by the former Crop Adviser Institute.

Click here to access the Preventive Maintenance Module


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Determination of Potential Microbial Hazard(s) in Animal Food
There are many factors that can contribute to feed becoming contaminated with a microbial hazard during the production of food for pets and livestock. The purpose of this reference document is to provide inspection program personnel with instructions to determine potential microbial contaminations that can lead to a food safety crisis within production facilities manufacturing food for pets and livestock.
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Risk Assessment Framework
Risk analysis activity for this project can be divided into two major components. The first section will examine the grain supply chain and determined the routes of potential compromises in food safety for corn and soybean supply chains. The second section will look specifically at the adulteration routes and determine the probability of occurrence for each. This measurement will allow for the development of control points so that the health of human and animal consumers can be protected.
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$0.00
Grain Chain Analysis
This grain module is brought to you by the Iowa Grain Quality Initiative, and was produced by the former Crop Adviser Institute.

Click here to access the Grain Chain Analysis Module


Grain chain analysis is an overview of grain flow beginning at the farm. The grain chain analysis shows the movement of grain, stored or transported from the farm to an elevator, feed mill or first level processor as a whole grain commodity.
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Crop Production Clipboard
Crop production clipboards provide a handy way to keep key reference information with you in the office helping customers or scouting in corn and soybean fields. Calibration and conversions supplement plant population charts and growth stages of corn and soybeans.
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Miscellaneous Item
$10.00
The Effectiveness of Neonicotinoid Seed Treatments in Soybean
Beginning in the early 2000s, neonicotinoids were increasingly used as seed treatments for field crops. More than 80 percent of corn and 40 percent of soybean acres nationally are planted with neonicotinoid-treated seed. Published research has shown that while neonicotinoids can be effective in controlling sporadic and inconsistent early-season threats such as wireworms or white grubs, they lose effectiveness well before midsummer, which is usually when the most potentially destructive soybean pest, the soybean aphid, begins to colonize soybean fields across the Midwest. Other publications have also shown that neonicotinoids spread readily through the environment and could pose a threat to beneficial species.

The publication was a joint effort of Purdue, Iowa State University, Kansas State University, the University of Nebraska-Lincoln, North Dakota State University, Michigan State University, the University of Minnesota, the University of Missouri, Ohio State University, Penn State University, South Dakota State University, Texas A&M University and the University of Wisconsin.

The PDF is available from Purdue University.
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Identifying Miscanthus in Iowa
Do you know the difference between the Miscanthus species? One species of Miscanthus is now being evaluated for its bioenergy potential. However, two other species of Miscanthus are becoming invasive in the United States. Due to the invasive risk, this resource will help you learn to identify each species.
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Weed Identification Field Guide 2nd Edition
The Weed Identification Field Guide, 2nd Edition, is a revised and expanded pocket-sized guide (3-3/4" x 6") for farmers and agronomists to use for weed identification in Iowa corn and soybean fields. The 2nd edition includes four new weed species, many new images, and updated text.

The 108 page booklet includes tools to aid in accurate weed identification as well as weed lifecycle and herbicide management and stewardship information. It includes over 35 illustrations and more than 250 high-quality photographs of weeds found in Iowa.

Previously known as CSI 3. CSI 0003
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$10.00
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$5.00
Conservation Techniques for Vegetable Production: Combining Strip-Tillage and Cover Crops
Strip-tillage is when a crop is planted into narrow, tilled strips and the non-tilled area between the strips might contain residue from the previous season's main crop or a living or dead cover crop.

Combining strip-tillage and cover crops offers various benefits including minimal soil erosion, maintains soil moisture and weed suppression. This publication provides basic information on using a strip-tillage system with rolled cover crops as a conservation best management practice in vegetable production systems such broccoli, peppers, pumpkins, squash and tomatoes.
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$0.00
ISU College of Agriculture and Life Sciences Research Progress Reports
Iowa State University's College of Agriculture and Life Sciences in partnership with ISU Extension, conducts research on Iowa farmland every year. The farm reports are annual agricultural research project updates. These articles are not final results, but progress reports on agricultural research activities.

Some of the projects are conducted at ISU and the research sites near Ames. Other projects are conducted at the outlying research farms strategically located across Iowa.

The farm reports are available through an online database system to assist you in accessing research progress articles.

Each article is an individual PDF (typically 100KB or less in size). You may download one PDF at a time, or select multiple articles and combine to create a custom binder report. The articles can be sorted by fields, areas, departments, or farms.

Visit the database and view articles at: https://www.iastatedigitalpress.com/farmreports/
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Soybean Growth and Development
This publication can help soybean producers achieve better yields. It includes photos of soybean vegetative and reproductive stages and updated information about soybean plant growth and management.

All images from this publication can be purchased by visiting our Digital Media section

This publication replaced SR 0053 - How a Soybean Plant Develops.
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$8.00
Scouting for Pythium root rot in Soybean
The Scouting for Pythium  root rot in Soybean card is a 6-page, tri-fold pocket-sized publication (3-3/4" x 6") that outlines the symptoms, scouting, management, and disease cycle of Pythium  root rot in soybean.
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$0.00
Giant Miscanthus Establishment
Giant Miscanthus is a popular crop for biomass production in the Midwest. Following recommendations for field preparation and management, timing and plants to use will help create a productive crop that requires minimal inputs after the first year.
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$0.00
Giant Miscanthus Eradication
Find steps for eradicating Giant Miscanthus, a warm-season perennial grass, when converting farmland from the grass to another crop. Although not spread by seed, the plant's resilient rhizome requires the two-to-three year eradication plan outlined in this fact sheet.
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Site-Specific Nutrient Management
Site-specific management and planning for nutrient inputs is needed for optimizing economic return and minimizing effects on environmental quality. This publication includes information about factors that influence soil fertility, fertilization management, and associated relations with environmental quality.
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$0.00
Scouting for twospotted spider mites in corn and soybean
 The Scouting for twospotted spider mites in corn and soybean card is a 6-page, tri-fold pocket-sized guide (3¾" x 6") containing scouting information, a description, and images of injury to corn and soybean caused by twospotted spider mites.
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$0.25
Giant Miscanthus Weed Control
Find methods to control weeds in Giant Miscanthus, a warm-season perennial grass, in this fact sheet. Includes herbicides and mechanical weed control methods
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$0.00
Identifying moths in black light and pheromone traps in the Midwest
Identifying moths in black light and pheromone traps in the Midwest scouting card is an identification tool for the differentiation of moths which can be caught in various traps. Moths include black cutworm, western bean cutworm, corn earworm, armyworms, and others.
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$0.25
Scouting for Goss's wilt of corn
The Scouting for Goss's wilt of corn card is a 6-page, tri-fold pocket-sized guide (3¾" x 6") that outlines the symptoms, scouting, management, and disease cycle of Goss's wilt in corn.
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$0.25
Early Season Soybean Scouting
The Early season soybean scouting card is a record keeping tool that outlines diseases, insects, and disorders that occur to seed, seedlings, and young soybean plants from shortly after planting through the V3 stage of vegetative growth.
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$0.25
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Vegetable Production Budgets for a High Tunnel
Figure high tunnel profitability for vegetable production with the systems and budgets described in this publication. The information is based on the detailed production records of five farmers growing crops such as bell peppers, cucumbers, eggplant, herbs, lettuce, and tomatoes.
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$0.00
Mid-season Soybean Scouting
The Mid-season soybean scouting card is a record keeping tool that outlines diseases, insects, and disorders that occur to soybean plants during the late vegetative through R2 growth stages.
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$0.25
Late Season Soybean Scouting
The Late season soybean scouting card is a record keeping tool that outlines diseases, insects, and disorders that occur to soybean plants during the R3 (pod fill) through R8 (maturity) growth stages.
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$0.25
Early Season Corn Scouting
The Early season corn scouting card is a record keeping tool that outlines diseases, insects, and disorders that occur to seed, seedlings, and young corn plants from shortly after planting through the V5 stage of vegetative growth
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$0.25
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Mid-season Corn Scouting
The Mid-season corn scouting card is a record keeping tool that outlines diseases, insects, and disorders that occur to corn plants during the later vegetative through R1 (silking) growth stages.
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$0.25
Late Season Corn Scouting
The Late season corn scouting card is a record keeping tool that outlines diseases, insects, and disorders that occur to corn plants from R2 (blister) through R6 (physiological maturity) growth stages.
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$0.25
Got Plant or Insect Problems?
The ISU Plant and Insect Diagnostic Clinic helps Iowans diagnose and manage plant diseases, weeds, and insects in fields and around your home. Here's an introduction to the clinic.
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Attitudes Toward Cover Crops in Iowa: Benefits and Barriers
Learn how research on cover crops as a means toward maintaining and increasing soil productivity, also reduce agriculture's environmental impacts.

Based on data from the Iowa Farm and Rural Life Poll 2010 Summary Report.
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Growing Organic Vegetables in Iowa
Organic production and consumption has increased over the past 20 years. Learn how to raise organic vegetables - including strategies for composting, pest management, and disease management.
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$0.00
Rainwater Catchment from a High Tunnel for Irrigation Use
Make high tunnels more profitable for crop production by installing a system to catch, store, and reuse the rainwater from periodic rain events. The authors describe system components, give approximate costs, and detail year-round maintenance procedures. Also described is a drip irrigation system.
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Giant Miscanthus - Rhizomes v. Plugs
Giant Miscanthus (Miscanthus x giganteus) is one of the most promising biomass crop candidates for the Midwest, but as a sterile hybrid perennial grass, it must be vegetatively propagated. Learn about how Research at Iowa State University indicates there is no significant yield difference between rhizome and plug propagation by the second growing season.
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Sensing Nitrogen Stress in Corn
Water quality concerns and high N fertilizer prices have made more precise nitrogen management strategies important to improve efficiency and profitability. Get the details here.
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Corn Growth and Development

Corn Growth and Development is an updated and expanded publication and includes whole plant photography, detailed descriptions of vegetative and reproductive development, and dry matter and nutrient accumulation figures.

Corn Growth and Development replaces the long-standing publication, How A Corn Plant Develops (SR 0048). Content related questions can be sent to the current Extension Agronomy point of contact Dr. Mark Licht at: lichtma@iastate.edu

Large quantity discounts (100 copies+) are available. To inquire, please contact us by email (extstore@iastate.edu) or calling (515)294-5247.

All images from this publication can be purchased by visiting our Digital Media section.

Requests for permission to repost, reprint or use content of ISU Extension and Outreach publications.
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Publication
$14.00
ePub (for iPad/iPhone)
$5.00
Kindle devices & apps
$5.00
Crecimiento y desarrollo del maiz (Corn Growth and Development Spanish version)
Corn Growth and Development is an updated and expanded publication and includes whole plant photography, detailed descriptions of vegetative and reproductive development, and dry matter and nutrient accumulation figures.

-This the Spanish version of Corn Growth and Development-

Content related questions can be sent to the current Extension Agronomy point of contact Dr. Mark Licht at: lichtma@iastate.edu

Large quantity discounts (100 copies+) are available. To inquire, please contact us by email extstore@iastate.edu or calling (515) 294-5247.
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$14.00
Foliar Fungicides for Corn: Targeting Disease
This publication provides information on foliar fungicides for corn, including when to scout, disease risk factors, and when a foliar fungicide application should be considered.
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Maximizing Profitability on Highly Erodible Land in Iowa | Conservation Reserve Program: Issues and Options
Options in grass may be the most profitable for CRP land when the long term cost of erosion is considered. Get the details on six income options: CRP, two rotational grazing options, two crop options (rotational corn/soybean), and alfalfa/orchard grass hay.
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Limiting Field Operations - Farm Energy
Certain field operations are required in modern crop production. But 100 percent fuel savings results when equipment stays parked in the machine shed and a trip across the field is eliminated. Find out how you can start to make a transition to very reduced or no tillage.
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2009 Summary Report - Iowa Farm and Rural Life Poll
Highlights from the 2009 farm and rural life poll include: the next generation of farmers, farm policy and commodity production, mixed livestock and grain farming, farming and food systems in rural communities, value-added agriculture, targeted conservation, nutrient removal wetlands, and personal and financial well-being.
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Grain Test Weight Deception
Some grain dryer advertisements may be deceptive. Get the details and see an example.
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The Ensiling Process and Additives
Ensiling products has many purposes, including achieving optimum dry matter content, providing long-term storage and increasing harvest-time flexibility. Learn how to safely and successfully ensile your plant products.
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Organic Flax Production in Iowa
There is renewed interest in growing food grade flaxseed and flaxseed oil in Iowa. Find the latest research and advice on planting, fertility requirements, variety selection, pest management, economics, harvesting, and more here.
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Flax Production Guidelines for Iowa
Flax for grain is beginning to be planted in Iowa again. Learn about rotation, planting, fertility, weed management, insect and disease control, and harvest.
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Intercropping Winter Cereal Grains and Red Clover
This publication provides details of research indicating intercropping of winter cereal grains with red clover is a promising option for expanding crop rotation. Careful management is the key.
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Concepts and Rationale for Regional Nitrogen Rate Guidelines for Corn
This publication focuses on rates of nitrogen application in rain-fed conditions, and corn-soybean and corn-corn rotations. The information is designed primarily for agronomists and crop consultants, and includes specific scientific rationale for corn nitrogen use and a regional approach to nitrogen rate guidelines.
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$4.50
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$0.00
About Ethics - Bioethics Outreach Series
Hard copies available from Glenda Webber -- 1210 Molecular Biology Bldg. -- Office of Biotechnology 515-294-4749.
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$0.00
Weed Management for Organic Farmers
Organic farmers use a wide variety of tools and strategies to control weeds without synthetic chemicals. Those tools and strategies and their effects on soil quality are discussed.
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Fundamentals of Organic Agriculture
Detailed information on organic agriculture including history, legalities and logistics, labeling, marketing, and pest and weed management. Includes two field examples on organic soybean and apple production.
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$0.00
Identifying Valuable Corn Quality Traits for Starch Production
This report is prepared by the Iowa Grain Quality Initiative Traits Task Team. It summarizes possible corn modifications to achieve new starches.
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Identifying Valuable Corn Quality Traits for Livestock Feed
This report is intended to provoke discussion and debate that will lead to a vision among researchers in public institutions, seed companies, and the feed industry for modifying corn quality traits to enhance its nutrient value in livestock feed applications. This report also attempts to provide direction to farmer organizations and the corn industry about potential targets for investing research funds.
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