Articles of Interest

Dr. Ken Cassman, University of Nebraska-Lincoln

Irrigated Corn Achieves High Yields with High Energy Efficiency, Little Impact on Environment - Jan. 2012 CropWatch Article 

Also check out:  Hybrid Maize Model-a computer program that simulates the growth of a corn crop (Zea mays L.) under non-limiting or water-limited (rainfed or irrigated) conditions based on daily weather data.

Corn Growth and Development-Iowa State UniversityCheck out the completely redone Corn Growth and Development publication from Iowa State University Extension!  Updated information for today's hybrids and excellent graphics. 


Corn Pollinating-Picture by Tom Dorn-UNL Extension Educator.How Extended High Heat Disrupts Corn Pollination - Aug. 2011 CropWatch Article.  Dr. Tom Hoegemeyer explains the conditions that affect pollen shed and viability in corn during high heat and high relative humidity. 


 slide rule imageClick here for more information on how to obtain your free N calculation slide rule from CropWatch.


Corn Nitrogen Recommendations Calculator - Excel sheet to determine recommended UNL nitrogen rates from soil tests.

Additional Articles

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Jenny ReesQuestions/Comments about the CropWatch Corn site? Please contact Jenny Rees, UNL Extension Educator in Clay County.


Southern Rust Confirmed in Southeast Nebraska

Figure 1. Southern rust spores are typically orange to tan in color and produced in pustules predominantly on the upper leaf surface, although they can also be produced abundantly on/near...

Resilient Ag Conference Now Open To Crop Advisors and Farmers

CCA Certification Credits Available Attend conference in person or online.   Gary Niemeyer Crop Advisors can earn continuing education credits for CCA...

Emergency Crop Damage Disaster Meetings July 17

Storm-damaged corn field in south central Nebraska, July 11. (Photo by Ron Seymour)   The Central Platte Natural Resources District will be hosting two meetings this Thursday...

Begin Scouting for Western Bean Cutworm Eggs in Corn

We recorded our first western bean cutworm moth capture in Nebraska at Concord on July 7, and a western bean cutworm egg mass was reported in Adams County the same day. The appearance of the...

Japanese Beetles Emerging; Identification Key to Management

Figure 1. Japanese beetle ( Popillia japonica Newman) Figure 2. Sand chafer, also known as the false Japanese beetle ( Strigoderma arboricola ) ...

Post-Hail Assessment: The Benefits of Patience

Figures 1 a-b.  Hailed corn on June 19 (left) and July 1 at UNL's Water Lab near Brule in west central Nebraska. While plants looked dismal immediately after the hail,...

Few Good Forage Options Available For Replant After Storms

Hail, tornados, high winds, and floods have damaged thousands of row crop acres. Sometimes planting an annual forage to replace these damaged crops should be considered. To do this effectively...

Look for Opportunities in Midst of Storm Damage

The June 3 storms caused wind, flooding/washing, and hail damage to crops in central and eastern Nebraska. As damage is being assessed, we've received questions including: ...

Check Growth Stage as You Make Cropping Decisions

Figure 1: Two corn plants from the same field. The left plant received frost damage to the first few leaves which died; the plant on the right was unaffected by the frost. Both plants are...

Stalk Borer Scouting

Degree day accumulations indicate that scouting should begin for stalk borer larvae across most of the corn growing areas of Nebraska this week. Begin scouting corn when 1,300-1400 DD...

Upcoming Events

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Corn Facts

Corn is an economically important crop to Nebraska resulting in $9.1 billion from 9.1 million acres harvested in 2012 according to USDA National Agricultural Statistics Service.

  1. Nebraska ranks 3rd in U.S. corn production.
  2. Nebraska ranks 1st in U.S. popcorn production.
  3. Nebraska ranks 1st in U.S. white corn production.
  4. Nebraska ranks 2nd in ethanol production capacity.

Contact Us

Charles Shapiro
UNL Extension Specialist

Jenny Rees
UNL Extension Educator

Keith Glewen
UNL Extension Educator