Weed management under different planting geometry in dry direct-seeded rice

A field experiment was conducted during Kharif 2013 at Pantnagar, Uttrakhand, to find out the effect of planting geometry in direct-seeded rice by different weed management practices. The experiment comprised of twelve treatments with four replications in factorial randomized block design of which main factor was three different planting geometry and subplots have four factors with three different weed control treatments with one weedy check. The treatment pre-emergence application of pendimethalin 1 kg/ha fb post-emergence application of bispyribac– Na 25 g/ha supplemented with one hand weeding along with planting geometry 20 cm at regular spacing increased the grain yield, weed control efficiency and net returns over all the other treatments of rice.