Effect of nutrient uptake by crop and weeds under different weed control treatment in wheat (Triticum aestivum L)

In agriculture weed causes more damage compared as to insects, pests and diseases but due to hidden loss by weed in crop production. It has not drown much attention of agriculturists. With an increase in labour cost and its unavailability is in peak period and crops susceptibility to weed compition the need of hour is to go for chemical weed control with their proper recommendation. The results of the field experiment reveled that to quantify the relative uptake by wheat and associated weeds under the influence of new herbicides. The minimum N, P and K uptake by weed was registered, when weeds were controlled by fenoxaprop p ethyl at (40, 60, 80 and 90g a.i. ha-1) and tank mix combination of fenoxaprop p ethyl (30, 40 and 50g a.i. ha-1) with isoproturon (500g a.i. ha-1) as well as isoproturon alone at 1000g a.i. ha-1 at 30 DAS proved effective in reducting total weed density and dry weight of weeds and recorded significantly highest uptake of N,P and K by crop and lowest uptake by weeds.