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Author: search.filters.author.Nair, K P MSubject: search.filters.subject.Critical periods of weed competition

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    Critical periods of weed competition in a short duration rice variety 'triveni'
    (Kerala Agricultural University, 1980) Abraham varughese; Nair, K P M
    In studies on the critical periods of crop-weed competition a in short duration rice variety 'Triveni,' carried out at the College of Agriculture, Vellayani, during the second crop season of 1976-77, it was found that the critical period of crop-weed competition lies between 21 and 40 days after transplanting. During i his period, the weed emergence and dry matter accumulation were maximum. At least a weed free condition of 21 -30 days in the critical period of 21-40 days, is essential to obtain good yields.