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  1. Crops
  2. Corn and Sorghum
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WC 94
2025 Herbicide Guide: Iowa Corn and Soybean Production
The 2025 WC94 provides useful information for the selection of herbicides to be used for weed management in soybeans, corn and pasture grown in Iowa. Herbicide injury symptoms that may occur on crops are described as well as timely discussions about evolved herbicide resistance in Iowa, issues with invasive weeds and the potential for herbicide carryover.
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CROP 3148
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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IPM 14
Field Crop Insects
Field Crop Insects contains descriptions and images of more than 50 pest and beneficial insects, as well as information on insect life cycle, crop injury, scouting and management options. There is also information on integrated pest management including scouting, degree days, and a defoliation estimation guide. This guide covers corn, soybean, and alfalfa insect pests.

Looking to purchase multiple copies? Field Crop Insects is also sold in boxed quantities of 25 at a reduced price ($6.00/copy).

Previously known as CSI 14. CSI 0014
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AEP 200
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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CROPR 3161
Guide to Iowa Corn Planting
Corn is grown on more acres of Iowa land than any other crop. This publication will help you better understand row spacing, hybrid selection, seeding rate and plant population, planting dates, seeding depth and much more.

Previously known as PM 1885 - Corn Planting Guide.
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NCR 327
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 America. It was a staple crop of many Native Americans and was grown in dozens of shapes and colors. The European corn borer originated in Eurasia and was accidentally introduced into North America. This insect readily adopted corn as a host and has since caused hundreds of millions of dollars in crop losses.

This publication is an update of the 1996 version published by the North Central Region.

Large quantity discounts (50 and 100 copies+) are available. To inquire, please contact us by email (extstore@iastate.edu) or calling (515)294-5247.
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IPM 5
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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CROP 3094B
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.
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IPM 5 BOX
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.

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CROP 3094A
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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IPM 78
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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IPM 76
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.

Reduced from $29.95
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CROP 3087
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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IPM 3
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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CROP 3074
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 byproduct consisting of lime-stabilized spent microbial biomass.

This publication discusses the research to evaluate the potential agricultural use of the byproduct.
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CSI 23
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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PM 1168
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 yield production against another over a period of time.
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PM 1635
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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PM 1800
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 measures, and what to do with contaminated corn.
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CSI 21
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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CSI 17
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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CSI 18
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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CSI 19
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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PM 1027
Nematodes That Attack Corn in Iowa
Learn about how to sample for nematodes and control them.
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PM 2026
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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PMR 1009 Figure 1
Initiation of vegetative and reproductive structures (chart)
Description/Suggested Alternate Text:
Periods of initiation and growth for individual above-ground plant structures from planting to R6.

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PMR 1009 Figure 2
Close-up of a collared leaf with "line" on the back side
Description/Suggested Alternate Text:
Collared leaves typically have a "line" on the back side that is distinguishable.

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PMR 1009 Figure 3
Close-up of collared leaves at leaf opening
Description/Suggested Alternate Text:
Collared leaves have slightly pale tissue at the point where the leaf opens away from the stalk.

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PMR 1009 Figure 4
Lower stalk split and nodes distinguishable
Description/Suggested Alternate Text:
Corn plant split lengthwise through the root system with nodes 1 through 8 visible.

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PMR 1009 Figure 5
Rate of vegetative development from emergence to final leaf (graphic)
Description/Suggested Alternate Text:
Prediction of vegetative development based on growing degree day accumulation.

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PMR 1009 Figure 6
Rate of reproductive development from R1 to R6 (graphic)
Description/Suggested Alternate Text:
Prediction of reproductive development based on growing degree day accumulation.

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PMR 1009 Figure 7
Impact of seeding depth on plant's root formation
Description/Suggested Alternate Text:
Seminal and nodal root development of V2 plants at seeding depths ranging from 0.5 to 2.5 inches deep. 

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PMR 1009 Figure 8
Lower stalk split with roots and nodes distinguishable
Description/Suggested Alternate Text:
Plant dissected lengthwise through the nodal root system with roots originating from specific stalk nodes.

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PMR 1009 Figure 9
Close-up of lower stalk and brace roots
Description/Suggested Alternate Text:
Brace root development at stalk nodes 6, 7, and 8.

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PMR 1009 Figure 10
Mature kernel with different components distinguishable
Description/Suggested Alternate Text:
Whole and cross-sectioned kernels with pericarp, embryo, and endosperm.

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PMR 1009 Figure 11
Germinating seed
Description/Suggested Alternate Text:
Four seeds showing the process of germination and changes in the radicle and coleoptile in timeline progression.

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PMR 1009 Figure 12
Emerged (VE) plant
Description/Suggested Alternate Text:
Plant at emergence with radicle, seminal roots, mesocotyl, and coleoptile.

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PMR 1009 Figure 13
Plant development from planting to V2
Description/Suggested Alternate Text:
Seed and plant growth from planting to V2 in timeline progression.

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PMR 1009 Figure 14
V1 plant
Description/Suggested Alternate Text:
Plant with one leaf collared; roots also shown.

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PMR 1009 Figure 15
V2 plant
Description/Suggested Alternate Text:
Plant with two leaves collared; roots also shown.

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PMR 1009 Figure 16
V3 plant
Description/Suggested Alternate Text:
Plant with three leaves collared; roots also shown.

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PMR 1009 Figure 17
Dissected V3 plant
Description/Suggested Alternate Text:
Plant completely dissected showing all visible leaves, stalk, and root system.

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PMR 1009 Figure 18
V6 plant
Description/Suggested Alternate Text:
Plant with six leaves collared; roots also shown.

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PMR 1009 Figure 19
Dissected V6 plant
Description/Suggested Alternate Text:
Plant completely dissected showing all visible leaves, stalk, ear shoots, and root system.

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PMR 1009 Figure 20
Tassel from a V7 plant
Description/Suggested Alternate Text:
The tassel and upper portion of the stalk from a V7 plant.

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PMR 1009 Figure 21
V9 plant
Description/Suggested Alternate Text:
Plant with nine leaves collared; roots also shown.

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PMR 1009 Figure 22
Dissected V9 plant
Description/Suggested Alternate Text:
Plant completely dissected showing all visible leaves, stalk, ear shoots, and root system.

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PMR 1009 Figure 23
Tassel from a V9 plant
Description/Suggested Alternate Text:
The tassel and upper portion of the stalk from a V9 plant.

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PMR 1009 Figure 24
Ear shoots from a V9 plant
Description/Suggested Alternate Text:
Ear shoots from stalk nodes 6 to 13 arranged in progression.

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PMR 1009 Figure 25
V12 plant
Description/Suggested Alternate Text:
Plant with twelve leaves collared; roots also shown.

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PMR 1009 Figure 26
Dissected V12 plant
Description/Suggested Alternate Text:
Plant completely dissected showing all visible leaves, stalk, ear shoots, and root system.

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PMR 1009 Figure 27
Tassel from a V12 plant
Description/Suggested Alternate Text:
The tassel and upper portion of the stalk from a V12 plant.

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PMR 1009 Figure 28
Ear shoots from a V12 plant
Description/Suggested Alternate Text:
Ear shoots from stalk nodes 7 to 14 arranged in progression.

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PMR 1009 Figure 29
V15 plant
Description/Suggested Alternate Text:
Plant with fifteen leaves collared; roots also shown.

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PMR 1009 Figure 30
Dissected V15 plant
Description/Suggested Alternate Text:
Plant completely dissected showing all visible leaves, stalk, ear shoots, and root system.

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PMR 1009 Figure 31
Tassel from a V15 plant
Description/Suggested Alternate Text:
The tassel and upper portion of the stalk from a V15 plant.

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PMR 1009 Figure 32
Ear shoots from a V15 plant
Description/Suggested Alternate Text:
Ear shoots from stalk nodes 6 to 13 arranged in progression.

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PMR 1009 Figure 33
Ears from a V15 plant
Description/Suggested Alternate Text:
Three uppermost ears from stalk nodes 11, 12, and 13.

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PMR 1009 Figure 34
V18 plant
Description/Suggested Alternate Text:
Plant with eighteen leaves collared; roots also shown.

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PMR 1009 Figure 35
Dissected V18 plant
Description/Suggested Alternate Text:
Plant completely dissected showing all visible leaves, stalk, ear shoots, and root system.

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PMR 1009 Figure 36
Tassel from a V18 plant
Description/Suggested Alternate Text:
The tassel and uppermost stalk node from a V18 plant.

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PMR 1009 Figure 37
Ear shoots from a V18 plant
Description/Suggested Alternate Text:
Ear shoots from stalk nodes 8 to 13 arranged in progression.

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PMR 1009 Figure 38
Ears with silks from a V18 plant
Description/Suggested Alternate Text:
Three uppermost ears from stalk nodes 11, 12, and 13.

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PMR 1009 Figure 39
Ears without silks from a V18 plant
Description/Suggested Alternate Text:
Three uppermost ears from stalk nodes 11, 12, and 13; silks have been removed.

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PMR 1009 Figure 40
Tassel from a VT plant
Description/Suggested Alternate Text:
The tassel and uppermost stalk node from a VT plant.

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PMR 1009 Figure 41
Tassel development timeline from V7 to VT
Description/Suggested Alternate Text:
Tassels from V7 to VT plants arranged in timeline progression showing the change in appearance that occurs.

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PMR 1009 Figure 42
Tassel at VT before pollen shed has begun
Description/Suggested Alternate Text:
Close-up of tassel prior to pollen shed; tassel is angled.

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PMR 1009 Figure 43
Tassel at VT after pollen shed has begun
Description/Suggested Alternate Text:
Close-up of tassel during pollen shed with anthers exserted; tassel is angled.

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PMR 1009 Figure 44
Close-up of the tassel main stem
Description/Suggested Alternate Text:
Close-up of the main stem during pollen shed with the anthers exserted.

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PMR 1009 Figure 45
Whole-season plant development timeline
Description/Suggested Alternate Text:
Plants spanning V2 to R6 arranged in timeline progression showing the change in appearance that occurs.

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PMR 1009 Figure 46
Whole kernel development timeline
Description/Suggested Alternate Text:
Whole kernels from R1 to R6 arranged in timeline progression showing the change in appearance that occurs.

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PMR 1009 Figure 47
Timeline of longitudinal cross-section of kernels
Description/Suggested Alternate Text:
Cross-section of kernels from R1 to R6 arranged in a timeline showing the change in appearance that occurs.

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PMR 1009 Figure 48
Timeline of planar cross-section of kernels
Description/Suggested Alternate Text:
Cross-section of kernels from R1 to R6 arranged in a timeline showing the change in appearance that occurs.

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PMR 1009 Figure 49
Timeline of ear cross-section
Description/Suggested Alternate Text:
Ears split in half to show cob and kernel development from R1 to R6; arranged in timeline progression.

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PMR 1009 Figure 50
Ear with and without husk leaves from an R1 plant
Description/Suggested Alternate Text:
Primary ear shown twice: first, with husk leaves and silks and second, without.

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PMR 1009 Figure 51
R1 plant
Description/Suggested Alternate Text:
Plant with uppermost ear silking and all leaves collared; roots also shown.

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PMR 1009 Figure 52
Dissected R1 plant
Description/Suggested Alternate Text:
Plant completely dissected showing all visible leaves, stalk, ear shoots, and root system.

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PMR 1009 Figure 53
Kernels from an R1 plant
Description/Suggested Alternate Text:
Three kernel views including whole and cross-sections.

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PMR 1009 Figure 54
Ear shoots from an R1 plant
Description/Suggested Alternate Text:
Three uppermost ear shoots from an R1 plant; shows difference in size between the primary ear shoot and lower shoots.

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PMR 1009 Figure 55
Ears with silks from an R1 plant
Description/Suggested Alternate Text:
Three uppermost ears with silks.

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PMR 1009 Figure 56
Ears without silks from an R1 plant
Description/Suggested Alternate Text:
Three uppermost ears with silks removed.

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PMR 1009 Figure 57
Kernels from an R2 plant
Description/Suggested Alternate Text:
Three kernel views including whole and cross-sections.

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PMR 1009 Figure 58
Ear cross-section from an R2 plant
Description/Suggested Alternate Text:
Ear cross-section with glumes visible around each kernel.

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PMR 1009 Figure 59
Ear with and without husk leaves from an R2 plant
Description/Suggested Alternate Text:
Primary ear shown twice: first, with husk leaves and silks and second, without.

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PMR 1009 Figure 60
Ear shoots from an R2 plant
Description/Suggested Alternate Text:
Three uppermost ear shoots arranged to show the difference in size between the primary ear shoot and lower shoots.

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PMR 1009 Figure 61
Ears with silks from an R2 plant
Description/Suggested Alternate Text:
Three uppermost ears with silks; primary ear larger than lower ears.

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PMR 1009 Figure 62
Ears without silks from an R2 plant
Description/Suggested Alternate Text:
Three uppermost ears with silks removed; primary ear is larger than lower ears.

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PMR 1009 Figure 63
Kernels from an R3 plant
Description/Suggested Alternate Text:
Three kernel views including whole and cross-sections.

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PMR 1009 Figure 64
Ear with and without husk leaves from an R3 plant
Description/Suggested Alternate Text:
Primary ear shown twice: first, with husk leaves and silks and second, without.

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PMR 1009 Figure 65
Ear shoots from an R3 plant
Description/Suggested Alternate Text:
Three uppermost ear shoots arranged to show the difference in size between the primary ear shoot and lower shoots.

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PMR 1009 Figure 66
Ears with silks from an R3 plant
Description/Suggested Alternate Text:
Three uppermost ears with silks; primary ear larger than lower ears.

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PMR 1009 Figure 67
Ears without silks from an R3 plant
Description/Suggested Alternate Text:
Three uppermost ears with silks removed; primary ear is larger than lower ears.

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PMR 1009 Figure 68
Kernels from an R4 plant
Description/Suggested Alternate Text:
Four kernel views including whole and cross-sections.

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PMR 1009 Figure 69
Ear with and without husk leaves from an R4 plant
Description/Suggested Alternate Text:
Primary ear shown twice: first, with husk leaves and silks and second, without.

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PMR 1009 Figure 70
Ear shoots from an R4 plant
Description/Suggested Alternate Text:
Three uppermost ear shoots arranged to show the difference in size between the primary ear shoot and lower shoots.

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PMR 1009 Figure 71
Ears with silks from an R4 plant
Description/Suggested Alternate Text:
Three uppermost ears with silks; primary ear larger than lower ears.

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PMR 1009 Figure 72
Ears without silks from an R4 plant
Description/Suggested Alternate Text:
Three uppermost ears with silks removed; primary ear is larger than lower ears.

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PMR 1009 Figure 73
Kernels from an R5 plant
Description/Suggested Alternate Text:
Four kernel views including whole and cross-sections.

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PMR 1009 Figure 74
Ear with and without husk leaves from an R5 plant
Description/Suggested Alternate Text:
Primary ear shown twice: first, with husk leaves and silks and second, without.

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PMR 1009 Figure 75
Ear shoots from an R5 plant
Description/Suggested Alternate Text:
Three uppermost ear shoots arranged to show the difference in size between the primary ear shoot and lower shoots.

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PMR 1009 Figure 76
Ears with silks from an R5 plant
Three uppermost ears with silks; primary ear larger than lower ears

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PMR 1009 Figure 77
Ears without silks from an R5 plant
Description/Suggested Alternate Text:
Three uppermost ears with silks removed; primary ear is larger than lower ears.

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PMR 1009 Figure 78
Kernels from an R6 plant
Description/Suggested Alternate Text:
Four kernel views including whole and cross-sections.

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PMR 1009 Figure 79
R6 plant
Description/Suggested Alternate Text:
Plant with uppermost ear mature and leaves browning; roots also shown.

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PMR 1009 Figure 80
Ear with and without husk leaves from an R6 plant
Description/Suggested Alternate Text:
Primary ear shown twice: first, with husk leaves and silks and second, without.

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PMR 1009 Figure 81
Ear shoots from an R6 plant
Description/Suggested Alternate Text:
Three uppermost ear shoots arranged to show the difference in size between the primary ear shoot and lower shoots.

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PMR 1009 Figure 82
Ears with silks from an R6 plant
Description/Suggested Alternate Text:
Three uppermost ears with silks; primary ear larger than lower ears.

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PMR 1009 Figure 83
Ears without silks from an R6 plant
Description/Suggested Alternate Text:
Three uppermost ears with silks removed; primary ear is larger than lower ears.

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PMR 1009 Figure 84
Dry matter of individual components (graphic)
Description/Suggested Alternate Text:
Dry matter of five above-ground components shown from VE to R6.

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PMR 1009 Figure 85
Cumulative dry matter (graphic)
Description/Suggested Alternate Text:
Total dry matter for the whole plant shown from VE to R6.

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PMR 1009 Figure 86
Nitrogen content of individual components (graphic)
Description/Suggested Alternate Text:
Nitrogen accumulation of five above-ground components shown from VE to R6.

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PMR 1009 Figure 87
Cumulative nitrogen (graphic)
Description/Suggested Alternate Text:
Total nitrogen accumulation for the whole plant shown from VE to R6.

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PMR 1009 Figure 88
Phosphorus content of individual components (graphic)
Description/Suggested Alternate Text:
Phosphorus accumulation of five above-ground components shown from VE to R6.

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PMR 1009 Figure 89
Cumulative phosphorus (graphic)
Description/Suggested Alternate Text:
Total phosphorus accumulation for the whole plant shown from VE to R6.

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PMR 1009 Figure 90
Potassium content of individual components (graphic)
Description/Suggested Alternate Text:
Potassium accumulation of five above-ground components shown from VE to R6.

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PMR 1009 Figure 91
Cumulative potassium (graphic)
Description/Suggested Alternate Text:
Total potassium accumulation for the whole plant shown from VE to R6.

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PMR 1009 Misc photo page 1
Emerged seedling in a field setting
Description/Suggested Alternate Text:
Plant emerged through the soil in an Iowa corn field.

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PMR 1009 Misc photo page 2
Field photograph of corn early-season (no sky showing)
Description/Suggested Alternate Text:
Iowa corn field with plants in a typical row width and plant density. 

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PMR 1009 Misc photo page 3
Upper plant canopy of a corn field
Description/Suggested Alternate Text:
Upper portion of plants in an Iowa corn field.

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PMR 1009 Misc photo page 43
Field photograph of young corn (with sky)
Description/Suggested Alternate Text:
Iowa corn field with plants in a typical row width and plant density.

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PMR 1009 Table 1
Corn vegetative and reproductive development stages (table)
Description/Suggested Alternate Text:
Official and common names for each developmental stage shown in Table form.

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PMR 1009 Table 2
Development staging and plant height conversion (table)
Description/Suggested Alternate Text:
The Leaf Collar Method compared with two other staging methods as well as plant height.

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PMR 1009 Table 3
Progression of grain moisture and dry matter during R5 (table)
Description/Suggested Alternate Text:
Progression of kernel milk line during R5 with approximate grain moisture, dry matter, growing degree days, and days necessary.

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PMR 1009 TOC Photo
Field photograph of corn mid-season (with sky)
Description/Suggested Alternate Text:
Iowa corn field with plants in a typical row width and plant density.

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PMR 1009 Back Cover photo
Silking ear in field
Description/Suggested Alternate Text:
Field shot of a silking ear with sunlight on the silks.

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PMR 1009 Cover photo
Rolling Iowa corn field (with sky)
Description/Suggested Alternate Text:
Iowa corn field with plants in a typical row width and plant density.

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PMR 1009 Digital Media
Corn Growth and Development | Digital Media collection - 101 Images, Charts and Figures
The Corn Growth and Development digital media collection contains all 101 images from the publication. All photos, charts, and diagrams display ©Iowa State University Extension and Outreach and are free of labels and watermarks.

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). 

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PMR 1009
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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PMR 1009(S)
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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CSI 16
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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PM 2089I
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, environmental, and energy returns for nitrogen and other fertilizers.
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BFC 16
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 startup, labor input, years to break even, return on investment, and more.
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BFC 19
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 startup, labor input, years to break even, return on investment, and more.
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BFC 20
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 for startup, labor input, years to break even, return on investment, and more.
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CRP 22
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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PM 1096
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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RECOVERY 40
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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PM 1625
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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PM 2015
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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PM 2006
Legume Living Mulches in Corn and Soybean
These mulches not only provide erosion control, but also fix atmospheric nitrogen. Learn more about five possibilities and their management.
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PM 1999
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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NCH 55
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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NCR 344
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.

Available from the University of Wisconsin Extension Learning Store.
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EDC 194
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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EDC 195
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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NCH 61
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 for evaluating custom drying and grain sale alternatives.
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