Abstract
The weed density under direct seeded rice (DSR) with Sesbania brown manuring (SBM) was found to be significantly less as compared to without SBM at 30 DAS and onwards. However, the production efficiency was significantly higher under DSR with SBM (28.99 kg/ha/day) as compared to DSR without SBM (23.99 kg/ha/day). Consequently, SBM gave higher net returns (20.75%) and B: C ratio (9.2%) as compared to without SBM treatment. Among weed management practices, bispyribac sodium @ 25 g/ha + (Chlorimuron + metsulfuron) @ 4 g/ha followed by one hand weeding at 45 DAS recorded higher grain yield (4.677 t/ha), production efficiency and net returns. It also reduced the weed density and weed biomass of grasses, broad leaf weeds, sedges and other weeds at 30-90 DAS.