Iowa State University is working to organize new and expanded corn nitrogen rate trials with farmers. The effort is part of an initiative to dramatically increase the number of rate trials across Iowa and provide more robust information back to farmers to assist with fertility decisions. The goal is have at least 400 rate trials per year across Iowa in all counties as the effort expands. 

Recruiting for crop year 2023 is now underway. Participants will have the opportunity to impact nitrogen recommendations by joining a group of 40 farmers (and growing) who partner with ISU to better understand nitrogen management on their own farms and other farms throughout the state. All location and farmer-specific data will remain confidential. 

Farmers interested in participating or learning more can click the link below to see the basic guidelines ISU is utilizing for the trials and find contact information. 

2023 Rate Trials Info.pdf