Vol. 10, Issue 12 (2021)

Author(s):
Sushree Pratikshya Rani and Sidhartha Priyatam

Abstract:
An experiment was undertaken to examine the influence of various tillage practices in conjunction with herbicides and mulching on weed density and grain yield of wheat at the Agricultural Farm of the Institute of Agriculture (Palli Siksha Bhavana), Visva-Bharati, Sriniketan, Birbhum, and West Bengal. With three replications, the experiment was set up in a split-plot design. The main plot was divided into two tillage methods: zero tillage (ZT) and conventional tillage (CT), as well as eight weed control practises viz, Straw mulching alone at 4.0 t ha^-1 at 20 DAS, Pendimethalin at 0.75 kg ha^-1, Clodinafop propargyl 15% + Metsulfuron methyl 1% WP at 0.40 kg ha-¹ at 30 DAS, Pendimethalin at 0.75 kg ha^-1 straw mulching at 4.0 t ha^-1 at 20 DAS, Pendimethalin at 0.75 kg ha^-1 fb clodinafop propargyl 15% + metsulfuron methyl 1% WP at 0.40 kg at 35 DAS, Straw mulching alone at 4.0 t ha^-1 at 20 DAS fb clodinafop propargyl 15% + metsulfuron methyl 1% WP at 0.40 kg at 35 DAS , Weed free and Weedy check were assigned to the sub-plot.There was a significant difference in density and biomass of grassy weeds between zero and conventional tillage, but no significant difference in growth and yield parameters or wheat yield among tillage methods. Maximum weed density were recorded in weedy check while maximum grain yield was observed in weed free and pendimethalin at 0.75 kg ha^-1 fb straw mulching at 4.0 t ha^-1 (W₄) plots. The lowest grain yield was in CT due to highest weed density and biomass. Pendimethalin at 0.75 kg ha^-1 and clodinafop propargyl 15% + metsulfuron methyl 1% WP proved to be effective herbicide against the control of total weeds.