Due to over mining of plant nutrients, soils in the Terai region have been depleted and to overcome this problem, it is necessary to add additional elements in the field. Long-term soil fertility experiment in Parwanipur was started since 1980/1981 to evaluate the long- term effect of organic manure and inorganic fertilizer on crop yield and soil properties. The effect of different level of fertilizer for high production in rice wheat system was the objective of this experiment. The experiment was conducted in Randomized Complete Block Design (RCBD) with three replications and twelve treatments……………….

Due to over mining of plant nutrients, soils in the Terai region have been depleted and to overcome this problem, it is necessary to add additional elements in the field. Long-term soil fertility experiment in Parwanipur was started since 1980/1981 to evaluate the long- term effect of organic manure and inorganic fertilizer on crop yield and soil properties. The effect of different level of fertilizer for high production in rice wheat system was the objective of this experiment. The experiment was conducted in Randomized Complete Block Design (RCBD) with three replications and twelve treatments……………….