Effect of organic manure, phosphorus and gypsum on groundnut (Arachis hypogaea) production under rainfed condition

Abstract

A field experiment was conducted during 1997 99 to evolve the nutrient management practice for high yield of groundnut (Arachis hypogaea L .) under rainfed condition. Application of farmyard manure (FYM) 10 tonneslha and poultrphanure Q 5 tonneslha. Increased mature pods/plant, pod weighvplant, sound mature kernel (%) and 100 kernel weight as compared with the control. Pod yield of groundnut increased by a mean of 14.0 and 11.3% owing to FYM and poultry manure application respectively, over the control (16.2 q/ha). Phosphorus at 60 kg/ha significantly improved mature pods/ plant, pod weight/ plant, filled pods (%), sound mature kernel and 100 kernel weight over 20 kg P,05/ha, and thereby pod yield of groundnut also. Significant improvement in yield attributes and pod yield was also noticed where gypsum was applied at 250 kg/ha either full at sowing or half at sowing or half at sowing half at 35 DAS. Interaction effect of organic manure and gypsum treatments was significant. Maximum pod yield was obtained with application of FYM gypsum in 2 splits. The economic optimum dose of phosphorus was computed under the application of FYM gypsum in 2 splits as 54.0 kg P,05/ha and at this level. 21.47 q/ha pod yield was predicted.