Corn P-Rate Calculator (.xls, may not work on Apple/MacIntosh computers) - Extension Circular 117 Nutrient Management Suggestions for Corn was revised in 2019. The P rate recommendation was revised to equal the estimated P removed in the past harvest. When soil test P and yields are very low, however, the P rate is better based on the soil test results. The Corn P Rate Calculator eases the rate determination in consideration of the previous crop, soil test P, frequency of P application, and yields of corn grain and stover harvest and soybean yield.
Download Nitrogen Loss Assessment Tool (N-LAT) for Nebraska (.xls) is used for corn and soybean production to estimate average nitrogen (N) loss over several years to leaching, volatilization, denitrification, and nitrous oxide emission for specific field management situations. The effects of alternative management practices can be assessed. N-LAT is not intended for short-term, in-season management decisions. Background Information and Users Guide for N-LAT (NebGuide G2249) provides the basis and procedure for using this Excel spreadsheet. N-LAT was revised in 2020 for revised organic N availability from applied manure, for N2O emission and volatilization of NH3 following manure application.
Hybrid-Maize Model – A computer program for simulating corn growth and yield