Integrated Crop Management News

Links to these articles are strongly encouraged. Articles may be republished without further permission if published as written and if credit is given to the author, Integrated Crop Management News, and Iowa State University Extension and Outreach. If articles are used in any other manner, permission from the author is required.

In-Field Drydown Rates and Harvest

September 28, 2010

By Roger Elmore and Lori Abendroth, Department of Agronomy

As of Sept. 27, nearly 91 percent of Iowa's corn rates are "safe from frost" according to the USDA- NASS report indicating the majority of the crop is physiologically mature (R6). The crop's development is five days ahead of normal, 68 percent mature, and dramatically outpaces the 43 percent mature recorded in 2009 for the same week. 

Fall Versus Spring Tillage, Which is Better

September 23, 2010

The question of fall or spring tillage is frequently asked; before it is answered, another question should be answered - is tillage needed? Learn what to consider when answering these two questions.

Video of VeraSun Preference Demand Letter Meeting Now Available

September 20, 2010

Iowans who received payment for corn or other services from VeraSun within 90 days of the company's filing for bankruptcy on Oct. 30, 2008 received preference demand letters at the end of August. The letters came from one of two New York law firms and demand that the supplier return a percent of the payments received from VeraSun during that 90-day period.

Corn Stalk Nitrate Interpretation

September 14, 2010
Graph showing the relationship between corn stalk nitrate-N concentration and the difference in N rate from the economic optimum N rate

Stalk nitrate test is best suited for understanding when N applications over time are greater than crop need, and an economic and environmental benefit can come from improved application rate.