Illinois Farmers Sought for On-farm Testing of N Rates

U of I is looking for farmers interested in participating in the third and final year of on-farm N rate trials.

Published on: Sep 28, 2007

The University of Illinois is looking for farmers who want to help put N rates to the test on their farms in 2008 and contribute to data for new N rate recommendations in the future.

For the past two years, a project funded by the Fertilizer Research and Education Council has been working with Illinois farmers to track corn nitrogen rate responses in on-farm, replicated strip tests. "We are looking for cooperators for 2008, which will be the final year of this project," says Emerson Nafziger, a U of I agronomist. "We hope to find some who will apply N 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."

Participants conduct the 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.

Farmers receive a payment for each trial completed to compensate them for yield loss in low rate-strips, and cover part of their effort.

Call Nafziger at 217-333-9658, or ednaf@uiuc.edu if you are interested in being in the 2008 study.