Nutrient uptake by wheat and associated weeds as influenced by management practices

A field experiment was conducted during November-May 1984 and 1985 to evaluate the effect of row spacing, seed rate, sowing method and weed control measures on the uptake of nutrients by different categories of weeds and the availability of nutrients to the crop. Closer row spacing, higher seed rate and cross-sowing significantly decreased the nutrient removal by grass and broad-leaf weeds, as well as by a sedge, compared with wider row spacing, normal seed rate and one-direction sowing, and resulted in higher nutrient uptake by the crop (.)