An experiment on the effect of crop weed competition on nutrient uptake by Japanese-mint (Mentha arvensis L.) and associated weeds was carried out at the Crop Research Centre of G.B.P.U.A. & T.. Pantnagar (Distt. Nainital) during 1987 and 1988. On an average, weeds removed highest amount of nutrient (N, P and K) in treatments where weeds were allowed to grow up to 90 days after planting, before first cutting, followed by weedy upto harvest after first cutting. However, lowest uptake of nutrients by weeds was recorded in treatment weed-free for the first 90 DAP+75 DAFC at first and second cuttings, respectively. Nutrient uptake by crop was highest in weed-free condition upto harvest follower' by treatments weed-free for the first 90 DAP+75 DAFC and weedy for the first 15 DAP+15 DAPC at first and second cuttings, respectively.
