The study was carried out in Boro 2001-2002 season at BRRI Farm Gazipur to control weed by water, chemical and direct management. In the managemeni there were two water treatments and four chemical and direct management treatments. The experiment was two factor randomized block design.
Treatments: 11 : Lrigation after 3 days of disappearing of standing water
12 : Irrigation after 5 days of disappearing of standing water
w1: Herbicide(6 DAS )+ 2 mechanical(2S & 50 DAS) + I hand weeding (75 DAS)
W2=2 mechanical weeding (25 & 50 DAS) + I hand weeding (75 DAS)
W3= Herbicide at 6 DAS + 2 mechanical weeding (25 & 50 DAS)
W4:2 mechanical weeding (25 & 50 DAS)
Sowing Method : Line sowing with 20 cm, Plot size :4 m x 2.5 m, Variety: BRRI Dhan 28, Seed Rate: T0kg/ha, Fertilizer rate:22A-t20-85-60-10 kgAra Urea, TSp, Mp, Glpsum, ZnSOI All fertilizer except urea was applied during land preparation. urea was top dresled in 4 equal splits at an interval of 20-2s-30-r5 days consecutively.
Pesticide: cidial 5G was applied for insect control one time and equal dose in every plot. Data collection: weed population; weed dry matter, labour requirement, yield data were collected during the experimental period.
Data collection: weed population; weed dry matter, labour requirement, yield data were collected during the experimental period.
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