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Threshold density of Echinochloa crus-galli (L.) Beauv. in rice weed competition



Threshold density of Echinochloa crus-galli (L.) Beauv. in rice weed competition



Journal of the National Science Council of Sri Lanka 14(2): 181-187



Transplanted rice Bg 276-5 and Bg 34-8 grown in the wet and dry seasons, resp., on a reddish brown earth was sensitive to the presence of E. crus-galli, panicle and spikelet numbers being particularly depressed. A highly significant negative correlation was established between weed DW and grain yield and paddy straw weight.

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