Effect of nitrogen rates and weed control methods on weeds abundance and yield of direct-seeded rice

Field experiments were conducted at the Punjab Agricultural University, Ludhiana, India, during 2007–2008 to examine if nitrogen (N) rates and weed management practices using herbicides in combination with hand-weeding (HW) can improve crop competitiveness against weeds, and increase the yield, water productivity and profitability of direct-seeded rice (DSR). Increasing N application rate up to 150 kg ha−1 caused significant improvement in grain...