摘要 : Field experiment was conducted during kharif and rabi seasons of 2005-06 to study the effect of different tillage and weed management practices on weed population dynamics in maize-sunflower cropping system. The results revealed t... 展开 Field experiment was conducted during kharif and rabi seasons of 2005-06 to study the effect of different tillage and weed management practices on weed population dynamics in maize-sunflower cropping system. The results revealed that continuous zero tillage resulted in increased perennial and some annual grass weed species. Treatments those received zero tillage after conventional tillage recorded higher density of other grasses. Density of <i>Cyperus rotundus</i> was higher in treatments those received conventional tillage. <i>Amaranthus viridis</i> and <i>Amaranthus polygamus</i> density was higher in zero tillage treated plot. But at the end of study period, their density became nil. Hand weeded plot significantly reduced all grass and broad-leaved weeds. Herbicide treated plot failed to reduce grassy weeds effectively. 收起