Frost/Freeze Effects on Corn and Soybean

My grandfather liked to say there was nothing wrong with Hooper, except that it had never made up its mind, alternately wanting to be Lubbock, Texas or Duluth, Minn. After a wet, late (in...

2014 Corn Harvest Marketing Decisions

The prices of agricultural commodities are ultimately dictated by supply and demand.  Increased corn supply from US growers places downward pressure on corn prices.  Corn prices can...

Flooded Fields and Diseases to Expect in Corn

Figure 1. Stalk and ear rot diseases may become more evident in fields with standing water. Monitor for weakened stalks and evidence of ear rot diseases.   ...

Late-Season Flooding Effects on Corn

Torrential rain fell across areas of central and eastern Nebraska this week, causing creeks and fields to flood. With more rains predicted for Sunday, how may flooding affect corn productivity? ...

Scheduling the Last Irrigation of the Season

Irrigating soybeans in late August. (Photo by Troy Ingram) It is approaching that time when we need to be thinking about scheduling the last irrigation of the growing season. Crop...

Do corn roots grow after VT (tasseling)?

Tom Hoegemeyer, Corn Breeder and Professor of Practice, UNL Department of Agronomy and Horticulture: The answer is yes, in both dryland and irrigated soils. The root hairs continue to grow at...

Corn GDDs Suggest Freeze Vulnerabilities

Persistently cool temperatures across most of the Corn Belt have dominated this season, raising the question of whether crops will reach physiological maturity before the first hard freeze. ...

UNL Releases CornWater Irrigation Management Tool

Figure 1: Home page of the UNL CornWater program (figures link to larger versions) Figure 2: CornWater evaluations for an example rainfed corn field in Lincoln of crop...

2014 Forecasted Corn Yields Based on Aug. 1 Hybrid-Maize Model Simulations

Figure 1. Hybrid-Maize Model locations.   Interpreting Yield Forecasts When the range of possible (i.e., simulated) end-of-season yield...

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.


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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