CFAES Give Today
Agronomic Crops Network

Ohio State University Extension


Nitrogen Management

Ohio’s corn nitrogen recommendation tool is the Corn Nitrogen Rate Calculator ( The Ohio database has over 300 trials where four or more rates were applied to understand nitrogen response over various soils, hybrids, and weather conditions. However, questions still exist on how the Maximum Return to Nitrogen (MRTN) rate affects yield and profitability on individual farms.

These plots are comparing the MRTN rate to a rate 50 pounds higher to check the yield and profit performance of the MRTN tool. You can find more information on this study and explore opportunities to complete a similar trial on your farm at

Questions? Contact Field Specialist Greg LaBarge at