A field experiment was conducted at Pant nagar during Kharif Season of 1997 to evaluate the contribution of summer groundnut residues alone or in combination with urea nitrogen on growth yield and nitrogen uptake of succeeding rice crop. The experiment was conducted in randomized block design with ten treatments viz. control (NO), 40 kg N/ha in splits (N40), 80 kg N/ha in split (N80), 120kg N/ha in split (N120), 160kg N/ha in split (N160), groundnut residue removal (GRR), groundnut residue incorporation (GRI), Groundnut residue incorporation + 40 kg N in split (GRI 40), Groundnut residue incorporation + 80 k N in split (GRI 80) Groundnut residue incorporation+ 120kg N/ha in split (GRI 120) with three replications. Rice grain yi,eld recorded under groundnut residue incorporation plus 120 kg N/ha through urea in split was at par with 160 kg N/ha through urea in split. The yield obtained in groundnut residue incorporation plus 80 kg N/ha through urea in split was similar to that of 120 kg N/ha through urea in split. Growing summer groundnut was better than fallow with respect to yield of rice. The other growth characters and nitrogen uptake also showed similar results. This integrated management with groundnut residue and urea nitrogen saved around 40 kg chemical. N/ha in rice crop due to preceding summer groundnut. The beneficial effect of summer groundnut was reflected through the mineral and mineralizable nitrogen strategies during rice growth.
Summer Groundnut residue, Nitrogen, Rice (Oryza sativa), Grain yield
