Impact off INM on Yield and Economics of Turmeric in Gangetic Alluvial Zone of West Bengal

As productivity of turmeric and soil health are reducing day by day due to improper application of chemical fertilizer, so present study was conducted to examine the effect of biofertilizers along with organic and different grades of inorganic nutrients on yield and economics of turmeric var. Suguna. Main objectives of this study were to use multiple sources of nutrients to increase productivity of turmeric rhizome and increase the B:C ratio. 13 treatments combination of nutrient sources like, 100%, 75% & 50% of NPK, 4 organic manures (compost, vermicompost, mustard cake and neem cake) and 3 bio-fertilizers (Nitrogen fixing -Azotobacter chroococcum, PSB -Bacillus polymixa and Potash mobilizer -Fraturia aurantia). Turmeric rhizomes were harvested from the farm and then yield, and economic parameters were calculated. Treatment combination Vermicompost + NPK (100%) + Biofertilizer significantly superior in clump, primary & secondary rhizome characters, projected yield (38.55 t ha⁻¹), cost of production, gross return, net return (350688 Rs ha) and B:C ratio (1.54). 25% of the full NPKcan be replaced by organic sources of nutrients, which will improve soil health and productivity.