Weed management in rice (Oryza sativa)–wheat (Triticum aestivum) cropping system under conservation tillage Surin Sushma Saroj1,*, Subject Matter Specialist, Singh M.K.1, Chief Scientist, Upasani R.R.1, Chief Scientist, Thakur R.1, Chairman, Pal S.K.1, Chief Scientist Birsa Agricultural University, Ranchi, Jharkhand-834 006 1Department of Agronomy, BAU, Ranchi, Jharkhand-834 006 *Corresponding author Email: sushmasarojsurin5@gmail.com
Online published on 25 September, 2013. Abstract A field experiment was conducted during 2009–10 and 2010–11 at agronomical research farm of Birsa Agricultural University, Ranchi with four tillage management viz. Zero till rice (Oryza sativa L.) and zero till wheat {Triticum aestivum (L.) emend. Fiori & Paol}; zero till rice and conventional till wheat; conventional till rice and zero till wheat and conventional till rice and conventional till wheat, in main plots and three methods of weed control practices viz. weedy check; recommended herbicides butachlor @ 1.5 kg/ha pre emergence + 2,4-D @ 0.5 kg/ha post emergence for rice and isoproturon @ 0.75kg/ha +2,4-D @ 0.5 kg/ha post emergence for wheat and two hand weeding (20 and 40 DAS for rice and 25 and 50 DAS for wheat, in sub plots to assess the productivity and profitability of rice–wheat cropping system under conservation tillage. Direct seeded rice–wheat sequence with conventional tillage produced maximum rice equivalent yield 7.4 t/ha (3.1 t/ha rice and 3.6 t/ha wheat) and net returns ( 58,206/ha). Among weed control, rice–wheat either with butachlor @ 1.5 kg/ha pre-emergence + 2,4-D @ 0.5 kg/ha post-emergence in rice and isoproturon @ 0.75kg/ha + 2,4-D @ 0.5 kg/ha post-emergence in wheat or, with two hand weeding in both crops produced maximum rice equivalent yield (7.4 t/ha and 7.8 t/ha) and net returns ( 62,258/ha and 60,498/ha) Top Keywords Conservation tillage, Direct seeded rice, Economics, Rice–wheat system, Weed control. Top |