Crops Bulletin
 April 28, 2017   
  Issue 1  

Prepared by

Paul Kassel

Extension Field Agronomist



(712) 262-2264




Serving Clay, Buena Vista, Dickinson, Emmet, Hancock, Kossuth, Palo Alto, Pocahontas, Sac and Winnebago Counties



The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, gender, religion, age, disability, political beliefs, sexual orientation, and marital or family status. (Not all prohibited bases apply to all programs.) Many materials can be made available in alternative formats for ADA clients. To file a complaint of discrimination, write USDA, Office of Civil Rights, Room 326-W, Whitten Building, 14th and Independence Avenue, SW, Washington, DC 20250-9410 or call 202-720-5964.

ISU corn planting date research.
Planting date/ northwest/ north central/ northeast/ average
-------------------------- bu/a-------------------------------
Late April          201               166                193                   186
Early May         205               169                190                   188
These date of planting studies were conducted at ISU research farms at Sutherland, Kanawha and Nashua (northwest, north central, northeast respectively) in 2014 to 2016.
-  Actual grain yields were similar for both planting dates.
-  Yield potential remains good for corn planted into mid-May.
-  planting dates were late April - 4/15-4/22 and early  May - 5/8-5/19.
-  The data is an average of a 95, 104 and 109 day hybrids.  
Imbibitional chill injury. Injury can occur to corn seedlings when corn seeds imbibe water that is colder than 50 degrees within 24 hours of planting.   Soil temps have fluctuated greatly in the past two weeks. Read more about imbibitional chill injury here .
Handy Bt trait table.   Keep track of rootworm, corn borer and herbicide traits in corn hybrids with this updated info.  Download this 'Handy Bt trait table' as a reference.
Climate change. Cool damp weather is currently on our minds - but climate change in northwest/north central Iowa is normal. Average annual rainfall, frost free days extreme rain events have increased since 1950. However, average annual temperature and growing degree days have decreased since 1950. The Sustainable website has more info.

Prepared by Paul Kassel, Extension Field Agronomist

Phone: (712) 262-2264, Email: