摘要 : A field experiment was conducted at Gayeshpur, B.C.K.V., West Bengal to assess the effect of organic manures and inorganic fertilizers on yield and nutrient uptake by greengram in rice-rapeseed-greengram cropping sequence and the ... 展开 A field experiment was conducted at Gayeshpur, B.C.K.V., West Bengal to assess the effect of organic manures and inorganic fertilizers on yield and nutrient uptake by greengram in rice-rapeseed-greengram cropping sequence and the residual soil fertility after the harvest of greengram. Application of recommended dose of NPK to all the component crops in the rice-rapeseed-greengram cropping sequence produced maximum yield attributes, seed and stover yields, higher N, P and K content in seed and stover as well as greater total uptake of NPK by greengram, but it recorded significantly lower values of organic carbon, total nitrogen and available P₂O₅ content in soil after harvest of greengram. Application of integrated use of organic with 50% NPK to rice produced almost similar results. But integrated nutrient management improved the residual soil fertility after greengram to a grater extent and the gain in organic carbon, total nitrogen and available P₂O₅ over the initial soil nutrient content was 0.324%, 0.023% and 2.8 kg/ha, respectively. 收起