Residual effect of organic manure, phosphorus and gypsum application in. preceding groundnut (Arachis hypogaea) on soil fertility and productivity of Indian mustard (Brassica juncea)

Abstract

A field experiment was conducted during 1997 98 and 1998 99 to evaluate the residual effect of organic manure, phosphorus and gypsum application in preceding groundnut (Arachis hypogaea L.) on soil fert lity and productivity of lndian mustard [Brassica juncea (L.) Czerni. Cosson]. Groundnut crop received 0, 10 tonnes FYM and 5 tonnes poultry manurelha as organic manure and 3 levels of P (20, 40 and 60 kg P2051ha). These 9 treatment combinations were kept in main plots and 3 gypsum levels (control, 250 kglha at sowing and 125 kglha at sowing 125 kg ha at 35 days after sowing) in subplots. Residual effect of organic manure significantly increased brancheslplant, siliquaelplant and 1,000 seed weight, and the seed yield of lndian mustard. The magnitude of increase in seed yield owing to residual effect of FYM and poultry manure was of 9.3 and 12.1% over the control. Residual effect of 60 kg P2051ha significantly increased siliquaelplant, seed weightlplant and 1,000 seed weight, and thereby the total seed yield of lndian mustard, which increased by 9.7% over 20 kg P2051ha. Significant improvement in yield attributes and seed yield of lndian mustard was also recorded where residual effects of gypsum treatments were applied compared with no gypsum residual.