We have added new information to the following article: Too little or too much nitrogen on corn: MSU’s new guidelines.

Michigan data has just been added to the Midwest N rate calculator, found at this link.

The Corn Nitrogen Rate Calculator Web tool is a resource that aids N rate decisions for corn production and is helpful in determining the effect of fertilizer cost and corn price on nitrogen application rates. You can work with any price of N and corn you wish when running the calculator. Output information includes the N rate at the Maximum Return To Nitrogen, the profitable N rate range, the net return to N application, the percent of maximum yield, and the selected N fertilizer product rate and cost.

The method for calculating suggested N rates is based on a regional (Corn Belt) approach to N rate guidelines. Details on the approach are provided in the regional publication Concepts and Rationale for Regional Nitrogen Rate Guidelines for Corn. This approach and the Corn Nitrogen Rate Calculator are now being used by seven Corn Belt states: Iowa, Illinois, Indiana, Michigan, Minnesota, Ohio, and Wisconsin; with Michigan and Ohio being added this year.