搜索结果: 1-2 共查到“农学 weed density”相关记录2条 . 查询时间(0.078 秒)
Sugar beet yield loss predicted by relative weed cover, weed biomass and weed density
crop–weed interaction weed competition yield loss function
2017/4/6
Sugar beet yield loss was predicted from early observations of weed density, relative weed cover, and weed biomass using non-linear regression models. Six field experiments were conducted in Germany a...
MOISTURE IN DIFFERENT SOIL LAYERS DEPENDING ON WEED DENSITY IN COTTON
moisture in different soil layers weeds cotton
2010/12/3
The main competitors of cotton during the crop production are annual late-spring weeds with some perennial species representing the second most important group. During the 1999-2001 period the effect ...