Effect of Organic and Inorganic Sources of Nutrients on Yield, Nutrient Uptake, Soil Fertility and Economics of Soybean-Wheat Cropping System

摘要

A field experiment was conducted to study the effect of organic and inorganic sources of nutrients applied in soybean-wheat cropping system. The productivity of crops in this system was higher in fertilizer as per soil test treatment followed by fertilizers as per STCR equation through the inorganic sources. Similar trend was noticed in soybean equivalent yield, the yield of these treatments were improved by 10.03 and 05.68 per cent than chemical fertilizers, respectively. Among the integrated nutrient treatments NPK through 25 per cent organic + 75 per cent inorganic sources recorded the highest soybean equivalent yield. Maximum uptake of NPK by soybean and wheat was recorded in fertilizers as per soil test treatment. Application of organic manuresresulted in significantly higher soil organic carbon, available NPK than chemical fertilizers but was on par with the integrated nutrient treatment. Economic returns were highest in fertilizer as per soil test treatment. However, B:C ratio was highest in fertilizers as per STCR equation through inorganic sources and was at par with fertilizer as per soil test treatment.