Response of ‘Cowpea 263’ to varying levels of phosphorus, potassium and zinc application

Abstract

A field experiment consisting of four levels each of phosphorus (0, 30, 60 and 90 kg/ha) and potassium (0, 15, 30 and 45 kg/ha) and three levels of zinc (0, 10 and 20 kg/ha) giving thereby 48 treatment combinations were tested on cowpea 263’ in single split plot design keeping levels of P2O5 and potassium in main plots, and levels of zinc in sub-plots for two consecutive rainy seasons of 1997 and 1998 at R.B.S. College, Bichpuri, Agra. The data recorded on growth, yield and net profit concluded that the application of phosphorus, potassium and zinc at the rate of 90 kg, 45 kg and 20 kg/ha respectively proved considerably better than their respective doses during both the years of investigation.