Growth and yield of sorghum (Sorghum bicolor) and groundnut (Arachis hypogaea) grown as sole and intercrops under different nitrogen regimes

An experiment involving different intercropping systems of sorghum [Sorghum bicolor(L.) Moench] and groundnut (Arachis hypogaea L.) in the rainy (khar if) season (1988 and 1989) under varying levels of nitrogen indicated the a dvantage of intercropping over sole cropping. Sorghum and groundnut intercr opping system with different levels of N appeared to be advantageous from t he values of land-equivalent ratio (LER), relative value total (RVT) and re lative net return (RNR). Application of the highest dose of N (120 kg/ha) r esulted in higher green and dry forage yields of sorghum compared to lower doses. Higher pod yield of groundnut was obtained from an application of 40 kg N/ha. With respect to crop-equivalent yield in terms of groundnut yield the intercropping combination of sorghum and groundnut in 1 : 2 ratio gave the maximum return.