Grain yield, nitrogen use efficiency and economics as influenced by levels and time of nitrogen application in aerobic rice (Oryza sativa) under Cauvery Command Area
Shekara, B. G.; Venkatesh, M.; Thimmarayappa, M.; Govindappa, M.
Research on Crops 12(2): 276-278
Field experiment was conducted during kharif seasons of 2004 and 2005 at Zonal Agricultural Research Station, V. C. Farm, Mandya, University of Agricultural Sciences, Bangalore to study the effect of levels and time of nitrogen application on growth and yield of aerobic rice (Oryza sativa L.). Mean of two years' research results revealed that application of 125 kg N/ha recorded higher grain yield (7.61 t/ha), net monetary returns (Rs. 31207/ha) and benefit : cost ratio (2.97) but was on par with 100 kg N/ha which recorded grain yield, net monetary returns and benefit : cost ratio of (7.39 t/ha, Rs. 29742/ha and 2.94, respectively). The agronomic efficiency of nitrogen was higher with application of 75 kg N/ha (45.37 kg grain/kg nitrogen).