Effects of weed densities on fresh corn yield | เธเธฅเธเธญเธเธเธงเธฒเธกเธซเธเธฒเนเธเนเธเธเธญเธเธงเธฑเธเธเธทเธเธเนเธญเธเธฅเธเธฅเธดเธเธเธญเธเธเนเธฒเธงเนเธเธเธเธฑเธเธชเธ
2007
Sodsai Changsaluk(Kasetsart University, Bangkok (Thailand). Inseechandrasatitya Institute for Crop Research. National Corn and Sorghum Research Center) | Tosapol Pornprom(Kasetsart University. Bangkhen Campus, Bangkok (Thailand). Faculty of Agriculture. Department of Agronomy) | Naroon Waramitr(Kasetsart University. Bangkhen Campus, Bangkok (Thailand). Faculty of Agriculture. Department of Agronomy) | Rungsit Suwanmakkha(Kasetsart University. Kamphaeng Saen Campus, Nakhon Pathom (Thailand). Faculty of Agriculture. Department of Agronomy) | Somchai Lim-aroon(Kasetsart University, Bangkok (Thailand). Inseechandrasatitya Institute for Crop Research. National Corn and Sorghum Research Center)
Effects of weed densities on fresh ear yield of sweet corn and waxy corn were conducted at the National Corn and Sorghum Research Center during April-June 2005. The RCBD with 3 replications, 10 treatments, includingweed densities of 10 20 40 60 80 100 120 140 and 160 plants/square m were employed. The results showed that most of weeds were nutsedge (Cyperus rotundus), synedrella (Synedrella nodifora) itchgrass (Rottboellia cochinchinensis), painted spurge (Euphorbia heterophylla), tropical spiderwort (Commelina benghalensis), running grass (Brachiaria reptans ) and goose grass (Eleusine indica). Weed densities of 10-160 plants/square m gave higher weed dry weight than Hand weeding (494-963 percent), and reduced fresh corn yield, i.e. yield with husk (20-53 percent), standard yield without husk (30-83 percent), number of standard ear and number of large ear. Moreover, weed densities of 10-160 plants/square m increased total weight of undergrade ear and number of undergrade ears.
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