Effect of Different Dose of Herbicide on Soil Physico-chemical and Biological Properties after Harvest of Wheat

Abstract

The purpose of the present experiment is to evaluate the efficacy of herbicide to control of weeds in wheat crop. The   field experiment was conducted at Agricultural Research Farm, Division of Agronomy, BHU, Varanasi, India. In the experimental field weeds were controlled by pre-emergence application of herbicides viz.,pendimethalin 30%  EC @ 600 g ha-1,pendimethalin 30%  EC @ 900 g ha-1, pendimethalin 30%  EC @ 1200 g ha-1, pendimethalin 30%  EC @ 1500 g ha-1,metribuzin 70%  WP @ 210 g ha-1 weed free (two hands weeding) and Untreated Control (Weedy check). Effect of treatments on soil physico-chemical properties like soil bulk density, soil p=H, electric conductivity and organic carbon are not significance variation among the treatments. The available nitrogen in soil after harvest of wheat was more under hand weeded treated plots which was statistically comparable with application of pendimethalin 30% EC @ 900 g ha-1 over  the rest of the treatments. However, available phosphorus and potassium in non-significant it did not influenced by the treatments.