Effect of N, P and K on the yield of cowpea, variety P118

Abstract

An experiment was conducted at the Instructional Farm of the College of Horticulture, Vellanikkara to study the effect of different levels of N, P and K on the yield of cowpea variety P-118. Nitrogen at 21.6 kg/ha was found to be the optimum level for maximum grain production. Optimum level of P could not be estimated since the crop exhibited a linear response beyond the maximum level tried. Applied K did not exhibit any significant influence on the yield components indicating the adequacy or soil supplies of the nutrient.