Wheat Yield and Soil Nutrient Status as Influenced by Continuous Cropping and Manuring in a Jute-Rice-Wheat Rotation

The assessment of wheat yield and status of some soil nutrient is reported after eight years of intensive cropping and manuring in a sequence of jute, rice and wheat on a new Gangetic alluvium. The higher grain production with 100% of the optimum soil test based NPK dose over the 50% NPK level was significant in most of the years and so also in the pooled data. There was significant interaction between treatments and years. It was seen from the linear regression equation that continuous use of 100% opt. NPK dose manifested in a positive trend in yield. A negative correlation was observed between wheat yield and atmospheric temperature prevailing during its growing season (December to March). The soil tested after eight years of cropping showed a declining trend in organic carbon and total nitrogen status while a noticeable build up of available N,P,K and Zn level was observed in the plots where such nutrients were being incorporated.