Production potentiality of rice in rice-rapeseed-greengram cropping sequence under system based nutrient management

Field experiment was conducted with an objective to formulate optimum system based nutrient management of rice in rice-rapeseed-greengram sequence. The results revealed that recommended NPK at 60:30:30 produced maximum grain and straw yield but integrated use of NPK (50%) + FYM at 10 t ha-1 produced higher yield of rice which was statistically at par with recommended NPK, moreover integrated use of NPK increased soil fertility status. With the increase in the dose of FYM, significant increase of organic carbon, total N and available phosphorus in soil after harvest of rice was observed. Organic carbon and available phosphorus was found lowest with 100% NPK to rice as compared to other treatments. The maximum organic carbon and total nitrogen content was recorded with integrated use of NPK whereas FYM at 5 t ha-1 + neem cake at 0.2 t ha-1 recorded maximum available P2O5 after rice. The maximum available K2O was observed in recommended NPK followed by integrated use of NPK. With the increase of FYM, available K2O was increased and found maximum in FYM at 10 t ha-1 to rice.