No. 22 Article 7/September 7, 2007

On-Farm Corn Nitrogen Rate Studies: Looking for Cooperators for 2008

In 2006 and 2007 we have had a project funded by the Fertilizer Research and Education Council (FREC) to look at corn nitrogen (N) rate responses in on-farm, replicated strip tests. We are looking for cooperators for 2008, which will be the final year of this project. We hope to find some who will apply N (as described below) yet this fall, but spring application is also fine. We are seeking cooperators in all areas of the state, and for both corn following corn and corn following soybean.

Cooperating producers (and in some cases their fertilizer dealers) conduct these trials using a simple design, with 5 N rates--0, 50, 100, 150, and 200 lb N/acre--applied in three different reps, for a total of 15 strips. Strips can be any reasonable size, from 8 to 16 rows wide by 300 to 1,000 feet long, as long as accurate rates can be applied and accurate yield measurements made. Additional N, such as that in MAP or DAP, can be applied to the whole area, as long as rates don’t exceed 35 to 40 lb of N. Cooperators receive a payment for each trial completed.

Please contact me (217-333-9658, ednaf@uiuc.edu) if you are interested in being involved in such a study in 2008.

A final note: We know where most of the 2007 trials are located, but not all cooperators have returned the 1-page form letting us know that “officially.” We need to get confirmation of all 2007 sites so that we can process payments and so we can be prepared to receive the data from this year. Please call or e-mail me if you or someone you work with has a trial established this year but you have not yet informed us of this fact.--Emerson Nafziger

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