Yadav, Santosh KumarTamta, Rahul2023-01-212023-01-212022-09https://krishikosh.egranth.ac.in/handle/1/5810192659A field experiment was conducted on a silty loam soil (Mollisol) at A-2 block (Rice Agronomy block), Norman E. Borlaug Crop Research Centre of G.B. Pant University of Agriculture and Technology, Pantnagar during Kharif on 2021 to study the “Assessment of Different Nutrient Management to Improve the Yield Potential of Rice (Oryza sativa L.)”. The soil was slightly alkaline (pH 7.6) in nature, high in organic carbon (0.87%), low in available nitrogen (227 kg/ha), and medium in available phosphorus (19.6 kg/ha) and potassium (202 kg/ha). The design was laid in Randomized Block Design having 8 treatments with 3 replications. The treatments comprises of T1-135 kg N + 42 kg P + 46 kg K (SSNM), T2- T1 + FYM @ 10 t/ha, T3-125 % of T1, T4- 150% of T1, T5- T1 + Sampoorna (KAU) @ 10g/l (250l/ha) micronutrient spray (55-60 DAT), T6- T1 + Eco- Agra spray 3 times @ 1 litre in 300 litre of water (25,40 and 55 DAT), T7- Farmers application (180 kg N + 60 kg P + 40 kg K) and T8-150 kg N + 60 kg P + P + 40 kg K + FYM @ 5t/ha). Rice variety Pant dhan-24 (PD-24) was used for the experiment. The results of study indicated that the treatment T2 (combination of SSNM and 10 t/ha FYM) was superior over the other nutrient management practices in terms of grain yield, yield attributing characteristics of rice, cost of cultivation and profitability. The net return, gross return and B: C ratio were also obtained higher under T2 due to higher yield and lower expenses on chemical fertilizer. Addition of 10 t/ha FYM with SSNM (site specific nutrient management) increases plant height, number of tillers per m2, dry matter accumulation, effective panicles, panicles length, grain yield, straw yield and also showed maximum nutrient uptake of nitrogen, phosphorus and potassium in plant.EnglishThesis