Response of Orchardgrass to Potassium and Nitrogen Fertilization on a Wickham Silt Loam1

Abstract
Synopsis: Annual application of 200 pounds of N and 83 pounds of K per acre resulted in the highest orchardgrass yields and best recovery of N, P, and K by the plant. The K level in the plant at which yields fell below the maximum was positively related to the rate of N applied.