The Tri-State Fertilizer Recommendations provide the foundation for agronomic nutrient management recommendations from the land-grant universities in Ohio, Michigan, and Indiana. The original publication, which came out in 1995, has been comprehensively updated with the release of the 2020 Tri-State Fertilizer Recommendations for Corn, Soybean, Wheat, and Alfalfa.
The publication relies on Ohio-generated data from 198 farmer-coordinated, on-farm trials in 39 Ohio counties and long-term plots at OARDC Ohio Agricultural Research and Development Center Agronomic Research Stations conducted from 2006-18. This data validates the recommendations against modern hybrids and varieties and agronomic management practices under current weather conditions. Key recommendations from the guide are included here. Continue reading