Economic benefit of rock phosphate application to the kharif green manure crop (Dhaincha) in rice mustard cropping system

摘要

A field experiment was conducted to compare the effect of different doses of rock phosphate with the recommended dose of superphosphate with or without green manuring in a rice (cv MW-10)-mustard (cv B-9) cropping system. Though superphosphate (60 kg P/hectare) gave the highest net profit of Rs 23 421 without green manuring and of Rs 31 785 with green manuring, rock phosphate application (100 kg P/hectare) also provided similar net profits of Rs 21 281 without green manuring and of Rs 31 905 with green manuring. Considering the benefit cost ratio, both sources in the control plots were found equally effective but in green manured plots RP100 was found superior.