Impact of Site Specific Nitrogen Management on Growth Parameters, Productivity and Profitability of Kharif rice

A field experiment was carried out during kharif 2021 (June-November) and 2022 at the Agronomy Main Research Farm, Department of Agronomy, College Agriculture, OUAT, Bhubaneswar. The laid in randomized complete block design with twelve treatments i.e. T1-RDF (80:40:40 kg N:P2O5:K2O ha-1), T2 - 20 N ha-1 LCC score <4 no basal N, T3 basal, T4 g SPAD value <35 T5- T6- Green seeker (GS) >1.25 RI T7- T8- 150 (N rich strip plot), T9- omission plot, T10- STBN, T11- INM (20 as FYM + 40 tillering PI stage), T12- Organic nutrient (FYM 10t 2t VC top dressing). Pooled analysis revealed that application recorded maximum dry matter accumulation (1194.1 m-2), larger leaf area index (3.30), highest number tillers (381 m-2) harvest CGR 18.73 m-2 day-1 60 to 80 DAT followed by treatment receiving Kg basal. Combined both years showed significantly higher grain yield (5.68 t straw (6.57 ha-1) (47 %) net return 55982 Rs B:C ratio 1.82.