LAUSR

Background: Agriculture sector is vital for food and nutritional security of the nation. Contrary to great stride in cereals and millets production during last few decades, desired rise in production of oilseeds has yet to be achieved though India has 14 and 9 per cent of global acreage and production.Methods: The present investigation was conducted during kharif seasons of 2016 and 2017, at Instructional farm, MPUAT, Udaipur to access the effect of different pre - post herbicides for weed control in groundnut under phosphorus application. This experiment was operated with six weed management practices and four phosphorus levels thus, 30 treatment combinations; all were evaluated in split-plot design with three replications.Result: Our investigations results revealed that herbicidal treatments as well as weed free check significantly control weed population and recorded the highest values of N, P, K concentration in weeds, kernel, biological yields and total chlorophyll content over weedy check while, significantly maximum N, P, K uptake and soil available phosphorus were noted under weedy check over rest of the treatments. Further, the results also showed that application of phosphorus exhibit significant increase in nutrient concentration and their uptake by weeds, kernel, biological yields, total chlorophyll content and soil available phosphorus over control during the course of investigation.