Effect of nutrient management and cropping system on productivity under different rice based cropping systems

A field experiment was conducted during 2010–11 to 2012–13 at Jabalpur (Madhya Pradesh) to study the effect of nutrient management and cropping system on productivity under different rice based cropping systems. The 4 different cropping systems (CS1-Green manuring Sunhemp – Rice – Wheat; CS2 – Rice – Chickpea –Sesame; CS3 – Rice – Berseem; CS4 – Rice -Vegetable pea -Sorghum) and three nutrient managements M1–100% Organic (1/3 N through each of FYM, Vermicompost and Neem oil cake), M2 -100% Inorganic (100% NPK through fertilizers), M3 -INM (50% NPK through fertilizer + 50% N through organic sources) with 3 replications were conducted in Strip Plot Design. The soil of the experimental field was sandy clay loam in texture, neutral in reaction (7.3), normal EC (0.52), low in OC (0.72%), medium in available N (264.05 kg ha⁻¹) and P (12.8 kg ha⁻¹) and high in K (285.2 kg ha⁻¹). The highest weed intensity of (352.6 m⁻²), weed biomass (1183 kg ha⁻¹), rice equivalent yield (69.35 q ha-1) and production efficiency (22.07 kg ha⁻¹ day⁻¹) during kharif, rabi and summer season in 100 per cent inorganic nutrient management and Rice-Berseem cropping system.