Rice-wheat is the predominant cropping system of North India in general and Punjab in particular, contributing towards food security of country to a large extent. Severe competition from weeds is one of the important factor determining productivity and sustainability of the system. Weeds compete with the crop plants for nutrients and other growth factors. Weeds can be effectively controlled with the use of selective herbicides.Use of herbicides can be effectively integrated with different planting patterns like zero till sowing with Happy Seeder, zero till sowing in standing stubbles, zero...