Weed management practices: there influence on weed control, nutrient removal and yield of soybean crop

Abstract

A field experiment was conducted during kharif season of 2014 at N. E. Borlaug Crop Research
Centre of G. B. Pant University of Agriculture & Technology, Pantnagar (Uttarakhand) to find out
the weed management practices: there influence on weed control, nutrient removal and yield of
soybean crop. The experiment was laid out in a randomized block design with four replications to
evaluate ten treatments viz. sulfentrazone 48% SC @ 300 g a.i/ha pre-emergence (PE), sulfentrazone
48% SC @ 360 g a.i/ha (PE), sulfentrazone 48% SC @ 360 g a.i/ha (PE) + hand weeding (HW) at 40
DAS, sulfentrazone 48% SC @ 300 g a.i/ha (PE) + HW at 40 DAS, pendimethalin 30 EC @ 750 g a.i/
ha (PE), pendimethalin 30 EC @ 1000 g a.i/ha (PE), pendimethalin 30 EC @ 750 g a.i/ha (PE) + HW
at 40 DAS and pendimethalin 30 EC @ 1000 g a.i/ha (PE) + HW at 40 DAS, weed free (Hand weeding
as and when required) and weedy check. Weed free plot recorded higher grain yield and weed
control efficiency (WCE) followed by PE application of sulfentrazone 48% SC @ 360 g a.i/ha + HW
at 40 DAS. The lowest total number of weeds, lowest total dry weight of weeds, nutrients removal
by weeds and weed index was recorded under PE application of sulfentrazone 48% SC @ 360 g a.i/
ha + HW at 40 DAS. PE application of sulfentrazone 48% SC @ 360 g a.i/ha + HW at 40 DAS could
be the recommended weed control option for managing weeds in soybean crop.