Studies on site specific nutrient management (SSNM) for maximization of yield and economics in hybrid rice (Oryza sativa)

A field study on site specific nutrient management for maximization of yield and economic return in hybrid rice (Oryza sativa L.) was conducted during kharif2003 and 2004. Fertilizer application in SSNM schedules showed significant improvement in yield attributes of hybrid rice compared to farmers' practice. Highest yield of hybrid rice was recorded (8353 kg ha(-1)) in SSNM 3 during 2003 which was 7.25% higher to SFR and 33.39% higher to farmers' practice and 9796 kg ha-1 in SSNM 7 during 2004 and was 15.76% more to SFR and 34.93% more to farmers' practice. Harvest index showed narrower variation within the treatments during each year. Grain and straw yields of hybrid rice was responded significantly. to the application of phosphorous, potash sulphur and zinc than its omitted treatments. Maximum production efficiency (68.47kg/ha/day) during 2003-04 was recorded with SSNM3 while during 2004-05 it was maximum (76.53 kg/ga/day) with SSNM (7). Maximum net return of Rs. 26,389 ha(-1) and B:C ratio (2.07) was recorded in SSNM1 followed by SSNM 3 during 2003 while maximum net return (Rs.33740 ha(-1)) and B:C ratio (2.32) were recorded in SSNM followed by SSNM, during 2004. SSNM schedules viz., SSNM7, SSNM 3 and SSNM, were found better responsive than other SSNM treatments and SFR and farmers' practice.