The sigmoidal relationship between weed density and crop yield was proposed by a).Zimdahl 1980 b). Roberts and Bonds (1975) c). Cousens et al (1985) d). None of these Answer : a).Zimdahl 1980...
A rectangular hyperbolic relationship be tween weed density and crop yield is pro posed by a). Roberts and Bonds (1975) b). Cousens et al (1984&1985) c). Zimdahl 1980 d). None of these
The international Weed Science Soci ety (IWSS) was formed in a). 1955 b). 1968 c). 1975 d). 1985 Answer : c). 1975...
Integrated weed management practices that a). Enhance crop competitive ability b). Decrease weeds ability to reduce yield c). Practices that eliminate weeds from an area d). Both a and b e). Both a and c Answer : d). Both a and b...
The Asian Pacific Weed Science Soci ety (APWSS) was founded in a). 1667 b). 1985 c). 1951 d). 1992 Answer : a). 1667...
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