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Critical Period of Crop-Weed Competition in Rice (Oryza Sativa L.)1 Shetty S.V.R.2, Senior author, Gill H. S.3, Agionomist 3Weed control, P.A.U., Ludhiana 2Present address is the Department of Agronomy, University of Agricultural Sciences. Htbbal, Bangalore-560024.
1Coniribunon fiom the Department of Agronomy., P.A.U., Ludhiana. Abstract Field and laboratory studies were conducted to find out the period of crop growth at which weeds provide maximum competition to rice. The most critical period of crop-weed competition in transplanted rice was between 4–6 weeks after transplanting. The maximum grain yield (5635 kg/ha) was obtained when the weeds were removed 4 weeks after transplanting. Successive delay in weed removal increased the weed dry matter and decreased the grain yield. Grain yield declined by about 10 q/ha, when the time of weed removal was extended from 6 to 8 weeks after transplanting. Top | |
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