Crops > Corn and Sorghum

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European Corn Borer - Ecology and Management and Association with other Corn Pests
Agriculture in North America has been dramatically influenced by crops and pests carried by humans, either intentionally or accidentally into the region. Corn, or maize, probably originated in Central
Crop Advantage | 2017 Series Proceedings
These proceedings feature summaries from workshops presented as part of the 2017 statewide Crop Advantage Series. Authors provide key points of their presentation, references for print and Internet m
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Bacterial Leaf Streak
This publication examines the symptoms of bacterial leaf streak in corn, describes how bacterial leaf streak differs from several other diseases that may look like it, and provides other information r
Iowa Crop Performance Tests -- Corn 2016
The Iowa Crop Performance Tests for corn is conducted each year to help farmers select the best hybrids for their production conditions. All 6 Corn Districts are now conveniently combined into one p
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2017 Herbicide Guide for Iowa Corn and Soybean Production
This publication provides information on product and management updates, the role of preemergence herbicides in glyphosate resistant crops, corn and soybean herbicide effectiveness ratings, herbicide
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Corn Disease Loss Estimates For the United States and Ontario, Canada - 2013
Created by the Crop Protection Network, which includes authors from land-grant universities across the North Central Region and Ontario, this publication documents the impact of major diseases on corn
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. This publication is available in pri
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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. This publicatio
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Ear Rots
This publication describes common corn ear rots in the United States and Canada, discusses mycotoxins associated with these ear rots, and briefly addresses management of ear rots and affected grain. T
Mycotoxin FAQs
This publication answers frequently asked questions (FAQs) about the mycotoxins produced by corn ear rot fungi. The publication was developed by the Crop Protection Network, which includes authors fro
Corn Disease Management - Grain Sampling and Mycotoxin Testing
This publication recommends grain sampling and testing methods for detecting mycotoxins. This publication was created by the Crop Protection Network, which includes authors from Land Grant universiti
Corn Disease Management - Storing Mycotoxin-Affected Grain
This publication outlines how to manage stored grain affected by mycotoxins. This publication was created by the Crop Protection Network, which includes authors from Land Grant universities across th
Corn Disease Management - Using Atoxigenics to Manage Aflatoxin
Aspergillus ear rot is one of the most economically important corn ear rots in the southern United States. The fungus produces aflatoxin, which is a dangerous mycotoxin. Most governments regulate afl
Corn Disease Loss Estimates For the United States and Ontario, Canada - 2015
Created by the Crop Protection Network, which includes authors from land-grant universities across the North Central Region and Ontario, this publication documents the impact of major diseases on corn
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, w
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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
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Corn Disease Loss Estimates For the United States and Ontario, Canada - 2014
Created by the Crop Protection Network, which includes authors from land-grant universities across the North Central Region and Ontario, this publication documents the impact of major diseases on corn
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
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Weed Identification Field Guide 2nd Edition (Unit=44)
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 soybe
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On-Farm Study Researches Novozymes Fermentation Spent Residuals
The Novozymes enzyme-manufacturing facility in Blair, Nebraska, produces enzymes through aerobic fermentation of non-pathogenic and non-toxigenic microorganisms. The process generates a solid byproduc
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ISU FARM Research Report 2012
Progress report on 2012 on-farm research trials conducted through Iowa State University's Farmer Assisted Research and Management (F.A.R.M.) program.
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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 inju
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Corn & Soybean Management: Insects and Diseases Series CD
This CD contains full versions of selected Crop Adviser Institute (CAI) learning modules in the Pest Management and Crop Management areas. You will have full access to all materials except the final C
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Corn Suitability Ratings -- An Index to Soil Productivity
Corn Suitability Rating (CSR) is an index procedure developed in Iowa to rate each different kind of soil for its potential row-crop productivity. The CSR can be used to rate one soil’s potential yiel
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Frost Damage to Corn and Soybeans
Learn about the characteristics, uses and handling and storage of frost-damaged corn and soybeans.
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Aflatoxins in Corn
Aflatoxins are a group of chemicals produced by certain mold fungi. Publication includes information on how to test corn for toxins, current regulations, consequences of high toxin levels, preventive
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Corn Diseases
This booklet will help corn producers and other professionals in the agriculture industry identify corn diseases and provide general recommendations for disease management. The current version i
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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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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
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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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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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Nematodes That Attack Corn in Iowa
Learn about how to sample for nematodes and control them.
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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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Close-up of a collared leaf with "line" on the back side
Collared leaves typically have a "line" on the back side that is distinguishable All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes y
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Close-up of collared leaves at leaf opening
Collared leaves have slightly pale tissue at the point where the leaf opens away from the stalkAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes
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Lower stalk split and nodes distinguishable
Corn plant split lengthwise through the root system with nodes 1 through 8 visibleAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowle
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Lower stalk split with roots and nodes distinguishable
Plant dissected lengthwise through the nodal root system with roots originating from specific stalk nodesAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase
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Germinating seed
Four seeds showing the process of germination and changes in the radicle and coleoptile in timeline progressionAll digital media is copyrighted by Iowa State University Extension and Outreach. Each pu
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Tassel from a V7 plant
The tassel and upper portion of the stalk from a V7 plant All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agreement
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Tassel from a V9 plant
The tassel and upper portion of the stalk from a V9 plant All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agreement
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Ear shoots from a V9 plant
Ear shoots from stalk nodes 6 to 13 arranged in progression All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agreeme
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Tassel from a V12 plant
The tassel and upper portion of the stalk from a V12 plant All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agreemen
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Ear shoots from a V12 plant
Ear shoots from stalk nodes 7 to 14 arranged in progression All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agreeme
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Tassel from a V15 plant
The tassel and upper portion of the stalk from a V15 plantAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agreement of
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Ear shoots from a V15 plant
Ear shoots from stalk nodes 6 to 13 arranged in progressionAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agreement o
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Tassel from a V18 plant
The tassel and uppermost stalk node from a V18 plantAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agreement of the T
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Ear shoots from a V18 plant
Ear shoots from stalk nodes 8 to 13 arranged in progressionAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agreement o
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Tassel from a VT plant
The tassel and uppermost stalk node from a VT plantAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agreement of the Te
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Tassel at VT before pollen shed has begun
Close-up of tassel prior to pollen shed; tassel is angled All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agreement of
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Tassel at VT after pollen shed has begun
Close-up of tassel during pollen shed with anthers exserted; tassel is angled All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgem
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Close-up of the tassel main stem
Close-up of the main stem during pollen shed with the anthers exsertedAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and
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Ear shoots from an R1 plant
Three uppermost ear shoots from an R1 plant; shows difference in size between the primary ear shoot and lower shootsAll digital media is copyrighted by Iowa State University Extension and Outreach. Ea
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Ear cross-section from an R2 plant
Ear cross-section with glumes visible around each kernelAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agreement of t
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Ear shoots from an R2 plant
Three uppermost ear shoots arranged to show the difference in size between the primary ear shoot and lower shootsAll digital media is copyrighted by Iowa State University Extension and Outreach. Each
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Ear shoots from an R3 plant
Three uppermost ear shoots arranged to show the difference in size between the primary ear shoot and lower shootsAll digital media is copyrighted by Iowa State University Extension and Outreach. Each
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Ear shoots from an R4 plant
Three uppermost ear shoots arranged to show the difference in size between the primary ear shoot and lower shootsAll digital media is copyrighted by Iowa State University Extension and Outreach. Each
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Ear shoots from an R5 plant
Three uppermost ear shoots arranged to show the difference in size between the primary ear shoot and lower shootsAll digital media is copyrighted by Iowa State University Extension and Outreach. Each
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Ear shoots from an R6 plant
Three uppermost ear shoots arranged to show the difference in size between the primary ear shoot and lower shoots All digital media is copyrighted by Iowa State University Extension and Outreach. E
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Corn vegetative and reproductive development stages (table)
Official and common names for each developmental stage shown in Table formAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement
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Development staging and plant height conversion (table)
The Leaf Collar Method compared with two other staging methods as well as plant heightAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your ackn
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Progression of grain moisture and dry matter during R5 (table)
Progression of kernel milk line during R5 with approximate grain moisture, dry matter, growing degree days, and days necessaryAll digital media is copyrighted by Iowa State University Extension and Ou
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Field photograph of corn mid-season (with sky)
Iowa corn field with plants in a typical row width and plant density All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and a
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Silking ear in field
Field shot of a silking ear with sunlight on the silksAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agreement of the
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Rolling Iowa corn field (with sky)
Iowa corn field with plants in a typical row width and plant density All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and a
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Initiation of vegetative and reproductive structures (chart)
Periods of initiation and growth for individual above-ground plant structures from planting to R6. All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase in
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Rate of vegetative development from emergence to final leaf (graphic)
Prediction of vegetative development based on growing degree day accumulationAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgeme
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Rate of reproductive development from R1 to R6 (graphic)
Prediction of reproductive development based on growing degree day accumulationAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledge
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Impact of seeding depth on plant's root formation
Seminal and nodal root development of V2 plants at seeding depths ranging from 0.5 to 2.5 inches deep All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase in
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Close-up of lower stalk and brace roots
Brace root development at stalk nodes 6, 7, and 8All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agreement of the Term
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Mature kernel with different components distinguishable
Whole and cross-sectioned kernels with pericarp, embryo, and endosperm. All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement
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Emerged (VE) plant
Plant at emergence with radicle, seminal roots, mesocotyl, and coleoptile. All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgem
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V1 plant
Plant with one leaf collared; roots also shown. All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agreement of the Te
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V2 plant
Plant with two leaves collared; roots also shown. All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agreement of the
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V3 plant
Plant with three leaves collared; roots also shown. All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agreement of th
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Dissected V3 plant
Plant completely dissected showing all visible leaves, stalk, and root system. All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowle
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Ears from a V15 plant
Three uppermost ears from stalk nodes 11, 12, and 13All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agreement of the T
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Ears with silks from a V18 plant
Three uppermost ears from stalk nodes 11, 12, and 13All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agreement of the T
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Ears without silks from a V18 plant
Three uppermost ears from stalk nodes 11, 12, and 13; silks have been removedAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgeme
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Ear with and without husk leaves from an R1 plant
Primary ear shown twice: first, with husk leaves and silks and second, withoutAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgem
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Kernels from an R1 plant
Three kernel views including whole and cross-sections All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agreement of the
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Ears with silks from an R1 plant
Three uppermost ears with silksAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agreement of the Terms and Conditions t
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Ears without silks from an R1 plant
Three uppermost ears with silks removedAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agreement of the Terms and Cond
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Kernels from an R2 plant
Three kernel views including whole and cross-sections All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agreement of the
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Ear with and without husk leaves from an R2 plant
Primary ear shown twice: first, with husk leaves and silks and second, withoutAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgem
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Ears with silks from an R2 plant
Three uppermost ears with silks; primary ear larger than lower earsAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agr
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Ears without silks from an R2 plant
Three uppermost ears with silks removed; primary ear is larger than lower earsAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgem
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Kernels from an R3 plant
Three kernel views including whole and cross-sections All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agreement of the
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Ear with and without husk leaves from an R3 plant
Primary ear shown twice: first, with husk leaves and silks and second, withoutAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgem
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Ears with silks from an R3 plant
Three uppermost ears with silks; primary ear larger than lower earsAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agr
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Ears without silks from an R3 plant
Three uppermost ears with silks removed; primary ear is larger than lower earsAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgem
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Kernels from an R4 plant
Four kernel views including whole and cross-sectionsAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agreement of the T
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Ear with and without husk leaves from an R4 plant
Primary ear shown twice: first, with husk leaves and silks and second, withoutAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgem
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Ears with silks from an R4 plant
Three uppermost ears with silks; primary ear larger than lower earsAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agr
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Ears without silks from an R4 plant
Three uppermost ears with silks removed; primary ear is larger than lower earsAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgem
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Kernels from an R5 plant
Four kernel views including whole and cross-sectionsAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agreement of the T
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Ear with and without husk leaves from an R5 plant
Primary ear shown twice: first, with husk leaves and silks and second, withoutAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgem
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Ears with silks from an R5 plant
Three uppermost ears with silks; primary ear larger than lower earsAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agr
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Ears without silks from an R5 plant
Three uppermost ears with silks removed; primary ear is larger than lower earsAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgem
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Kernels from an R6 plant
Four kernel views including whole and cross-sectionsAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agreement of the T
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Ear with and without husk leaves from an R6 plant
Primary ear shown twice: first, with husk leaves and silks and second, without All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowle
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Ears with silks from an R6 plant
Three uppermost ears with silks; primary ear larger than lower ears All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and
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Ears without silks from an R6 plant
Three uppermost ears with silks removed; primary ear is larger than lower ears All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowle
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Plant development from planting to V2
Seed and plant growth from planting to V2 in timeline progression. All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and
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V6 plant
Plant with six leaves collared; roots also shown. All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agreement of the
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Dissected V6 plant
Plant completely dissected showing all visible leaves, stalk, ear shoots, and root system. All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes y
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V9 plant
Plant with nine leaves collared; roots also shown All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agreement of the
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Dissected V9 plant
Plant completely dissected showing all visible leaves, stalk, ear shoots, and root system All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes y
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V12 plant
Plant with twelve leaves collared; roots also shown All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agreement of th
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Dissected V12 plant
Plant completely dissected showing all visible leaves, stalk, ear shoots, and root system All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes yo
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V15 plant
Plant with fifteen leaves collared; roots also shown All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agreement of t
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Dissected V15 plant
Plant completely dissected showing all visible leaves, stalk, ear shoots, and root systemAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your a
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V18 plant
Plant with eighteen leaves collared; roots also shownAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agreement of the
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Dissected V18 plant
Plant completely dissected showing all visible leaves, stalk, ear shoots, and root systemAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your a
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Tassel development timeline from V7 to VT
Tassels from V7 to VT plants arranged in timeline progression showing the change in appearance that occursAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchas
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Whole-season plant development timeline
Plants spanning V2 to R6 arranged in timeline progression showing the change in appearance that occursAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase in
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Whole kernel development timeline
Whole kernels from R1 to R6 arranged in timeline progression showing the change in appearance that occursAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase
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Timeline of longitudinal cross-section of kernels
Cross-section of kernels from R1 to R6 arranged in a timeline showing the change in appearance that occursAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchas
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Timeline of planar cross-section of kernels
Cross-section of kernels from R1 to R6 arranged in a timeline showing the change in appearance that occursAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchas
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Timeline of ear cross-section
Ears split in half to show cob and kernel development from R1 to R6; arranged in timeline progressionAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase inc
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R1 plant
Plant with uppermost ear silking and all leaves collared; roots also shown All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement
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Dissected R1 plant
Plant completely dissected showing all visible leaves, stalk, ear shoots, and root systemAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your a
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R6 plant
Plant with uppermost ear mature and leaves browning; roots also shown All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and
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Dry matter of individual components (graphic)
Dry matter of five above-ground components shown from VE to R6All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agreemen
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Cumulative dry matter (graphic)
Total dry matter for the whole plant shown from VE to R6All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agreement of t
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Nitrogen content of individual components (graphic)
Nitrogen accumulation of five above-ground components shown from VE to R6All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement a
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Cumulative nitrogen (graphic)
Total nitrogen accumulation for the whole plant shown from VE to R6 All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and
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Phosphorus content of individual components (graphic)
Phosphorus accumulation of five above-ground components shown from VE to R6All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement
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Cumulative phosphorus (graphic)
Total phosphorus accumulation for the whole plant shown from VE to R6All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and a
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Potassium content of individual components (graphic)
Potassium accumulation of five above-ground components shown from VE to R6All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement
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Cumulative potassium (graphic)
Total potassium accumulation for the whole plant shown from VE to R6All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and ag
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Emerged seedling in a field setting
Plant emerged through the soil in an Iowa corn fieldAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agreement of the T
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Field photograph of corn early-season (no sky showing)
Iowa corn field with plants in a typical row width and plant density All digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and a
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Upper plant canopy of a corn field
Upper portion of plants in an Iowa corn fieldAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and agreement of the Terms an
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Field photograph of young corn (with sky)
Iowa corn field with plants in a typical row width and plant densityAll digital media is copyrighted by Iowa State University Extension and Outreach. Each purchase includes your acknowledgement and ag
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Corn Growth and Development | Digital Media collection - 101 Images, Charts and Figures | 72 dpi
The Corn Growth and Development digital media collection contains all 101 images from the publicaiton. All photos, charts, and diagrams display ©Iowa State University Extension and are free of l
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Corn Growth and Development | Digital Media collection - 101 Images, Charts and Figures | 300 dpi
The Corn Growth and Development digital media collection contains all 101 images from the publicaiton. All photos, charts, and diagrams display ©Iowa State University Extension and are free of la
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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
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ePub (for iPad/iPhone) $5.00 Add to Cart
Kindle devices & apps $5.00 Add to Cart
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 a
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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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Energy Conservation in Corn Nitrogen Fertilization - Farm Energy
Optimum corn yields require nitrogen fertilization in most crop rotations, but the energy consumed during the production of nitrogen fertilizer is considerable. Learn more about maximizing economic, e
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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 soybe
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Enterprise Budget: Popcorn
Find facts about growing, harvesting, and marketing popcorn to help you decide whether or not this crop will fit your enterprise budget. Includes an enterprise assessment showing capital needed for st
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Enterprise Budget: Sorghum
Find facts about growing, harvesting, and marketing sorghum to help you decide whether or not this crop will fit your enterprise budget. Includes an enterprise assessment showing capital needed for s
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Enterprise Budget: Sweet Corn
Find facts about growing, harvesting, and marketing sweet corn to help you decide whether or not this crop will fit your enterprise budget. Includes an enterprise assessment showing capital needed fo
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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
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Controlling Corn Diseases in Conservation Tillage
This publication describes corn diseases that are more prevalent in conservation tillage systems and their management strategies.
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Managing Immature Crops for Grain or Silage -- Disaster Recovery
Tips on managing crops that may not mature before the first killing freeze of fall.
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Protecting Sweet Corn from the Corn Earworm with Vegetable Oil and Btk -- Sustainable Agriculture
Read about one Iowa on-farm research project that confirms sweet corn producers can effectively manage corn earworm by applying vegetable oil-Btk.
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Moisture Basis Conversions for Grain Composition Data
Information on moisture basis conversations, which are purely mathematical adjustments that don't change the fundamental quality of the grain.
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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,
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Legume Living Mulches in Corn and Soybean
These mulches not only provide erosion control, but also fix atmospheric nitrogen. Learn more about five possibiities and their management.
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Small Grain Cover Crops for Corn and Soybean
Learn about species selection, management, and pros and cons of these cover crops.
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Iowa Grain Quality Initiative
Worldwide emphasis on grain quality and the increasing use of value-added grains for a specific purpose hold tremendous opportunities for Iowa corn and soybean growers. The Iowa Grain Quality Initiat
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Corn Planting Guide
This publication will help you optimize yields by understanding planting date, depth, population, row spacing, and replant decisions.
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Corn Hybrid Maturity Management for the Central and Northern Corn Belt
Learn how corn maturity management can maximize grain production and quality of corn for the central and northern Corn Belt.
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Corn Silage Harvest Techniques
Details on efficiently harvesting and storing corn for quality silage.
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Nitrification Inhibitors for Corn
This publication discusses nitrogen losses from soils, characteristics of nitrification inhibitors, and how nitrification inhibitors can be used to improve efficiency of corn production.
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Eyespot of Corn
Learn about eyespot, a common disease in Midwest corn -- its causes, symptoms, and control.
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Corn Stewart's Disease
Publication includes information on disease symptoms, disease spread and development, temperature and flea beetle survival, and how to control the disease.
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Dealing with Uneven Emergence in Corn
This report will help you determine what to do with uneven corn emergence: protect small plants, replant stands, or fill in poor stands.
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Irrigation Scheduling for Corn -- Why and How
This publication discusses the potential benefits of proper corn irrigation scheduling; the crop, soil, and climatic factors involved and their relationships; methods of determining irrigation timing
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Phosphorus Sources for Corn Fertilization
This publication examines common phosphorus fertilizer materials, P availability, advantages and drawbacks, conditions for best use, and more.
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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
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Iowa Gold Catalog High-Oil Corn Test 1998
Seed corn companies entered high-oil corn blends in this field test (1998). Results are presented.
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Corn Ear Rots, Storage Molds, Mycotoxins, and Animal Health
Learn how to identify corn ear rots, storage molds, and mycotoxins and how they affect animal health. Includes a checklist to help prevent molds and toxins and what to do with damaged grain.
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Crops: Harvesting Corn and Soybeans - Disaster Recovery Series
Provides tips for harvesting in less than ideal conditions to limit harvest losses and maintain acceptable grain quality.
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Corn Disease Management
This publication discusses the major categories of corn diseases and common control alternatives for each.
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Calculating Grain Weight Shrinkage in Corn Due to Mechanical Drying
There is no standard method to determine corn shrinkage. This publication describes several popular methods, provides examples of their calculations, and discusses the use of shrinkage as a basis fo
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Origin, Adaptation, and Types of Corn
Corn is the only important cereal indigenous to the Western Hemisphere. Find out about corn's origin, adaptation, and the different types of corn (dent, flint, flour, sweet, pop, and pod).
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