Integrated nutrient management in maize (Zea mays)-gobhi sarson (Brassica napus ssp oleifera var. annua) cropping system under rainfed condition

Abstract

An experiment was conducted during 1998-99 to 2000-01 to work out an integrated nutrient management schedule for maize (Zea mays L.)-gobhi sarson (Brassica napus ssp oleifera var annua) cropping system under rainfed conditions. The total grain production was higher (110.5 qlha) when both crops in system were given 150% of recommended NPK and was 28 and 26% higher over recommended fertilizer application in maize and gobhi sarson respectively. However, an application of 150% of recommended NPK to maize and 100% NPK + 10 tonneslha farmyard manure (FYM) to gobhi sarson also resulted in statistically similar grain yield (108 qlha). Ap- plication of 10 tonnes FYM along with 100% NPK either to one crop or both crops increased the system produc- tivity by 7.7% over 100% NPK, application only. The N,P and K uptake in system was higher when both crops in system were given 150% NPK, followed by 100% NPK + 10 tonnes FYMIha application. Higher gross returns (Rs 75,251) and benefit : cost ratio (2.68) were obtained when both crops in system were given 150% of recom- mended NPK. Application of recommended NPK to both crops although gave lower gross returns (Rs 56,786), the benefit : cost ratio of 2.18 was most practical under limited resources.