Utilizing P and K Fertilizer Recommendations in Ohio with On-Farm Strip Trials


  • Steve Culman
  • Ohio State University, School of Environment and Natural Resources
Project Media

In Ohio, phosphorus (P) and potassium (K) recommendations for corn and soybean were last updated in 1995 with the Tri-State Fertilizer Recommendations. Water quality and nutrient management issues in the state have stimulated interest in re-evaluating these recommendations after more than two decades. From 2014-2018, we conducted 102 on-farm trials in P in corn and soybean and 84 trials in K for corn and soybean in Ohio.