Last fall the Corn Nitrogen (N) Rate Calculator Web tool went online. It is a resource that aids N-rate decisions for corn production and is helpful in determining the effect of fertilizer price on application rates. The method for calculating suggested N rates is based on a regional (Corn Belt) approach to nitrogen-rate guidelines. Details on the approach are provided in the regional publication, Concepts and Rationale for Regional Nitrogen Rate Guidelines for Corn, PM 2015. Background information and interpretation of suggested N-rate guidelines were previously provided in an ICM newsletter article.
Available at: http://works.bepress.com/john-sawyer/36/