Impact of Different Tillage Practices and Pre-mix Herbicides on Growth Indices of Wheat Crop

Abstract

Growth indices changes from sowing till harvesting of the crop were monitored under the influence of four tillage options (zero tillage no-residue, zero tillage with residue, conventional tillage no-residue and conventional tillage with residue) and four weed management practices (sulfosulfuron + metsulfuron @ (30+2) 32g a.i. ha-1, clodinafop propargyl + metsulfuron methyl @ (60+4) 64 g a.i. ha-1, weed free (30 and60 DAS) and weed check) during rabi season of 2019-20 and 2020-21. Analysis of the two years average data indicated that conventional tillage with residuealong with application of clodinafop propargyl + metsulfuron methyl @ (60+4) 64 g a.i. ha-1resulted in the highest significant values of crop growth rate (CGR)and leaf area duration (LAD) up to 90 DAS after which it declineswhereasrelativegrowth rate (AGR) shows a declining trend from sowing till harvesting.Net assimilation rate (NAR) was found to be unaffected by the treatment during first year of experimentation.However, it was significantly affected during second year of experimentation which declines from sowing to harvesting. No interaction effect was found among different treatments. The overall findings concluded that conventional tillage with residue along with application of clodinafop propargyl + metsulfuron methyl @ (60+4) 64 g a.i. ha-1could be more beneficial in the study area.