Establishment Methods, Crop Residues and Nitrogen Effect on Yield and Economics of Rice (Oryza sativa L) in Cauvery Old Delta

Field experiments were conducted in the Tamilnadu Rice Research Institute Aduthurai of Cauvery old delta during Rabi 2013 and Kharif 2014 to study the performance of different establishment methods, residue incorporation and nitrogen for rice cultivation. The experiments were laid out in Strip-split-split plot design with four replications. Short duration rice variety ADT (R) 45 was used as a test variety in the study. The treatments consists of unpuddled machine planting and puddled manual transplanting in strip plots, without residue and with residue(15 cm) at split plots and basal N dose at (0, 15, 30 kg ha⁻¹) in sub plots The grain yield was maximum of(6.42t ha⁻¹)for the manualplanting with residue and with basal application of 30 N kg ha⁻¹ and the lowest yield was obtained at machine planting unpuddled without residue and basal without N application (4.27tha⁻¹)inkharif 2014 similarly better plant height, number of tillers per hill, productive tillers, filled grains and 1000 grain weight and straw yield were maximum with net returnof Rs 48, 181and benefit cost ratio(3: 51) as compared to the other treatment combinations