Three sowing dates viz.05 June, 20 June and 05 July and six weed management practices viz pendimethalin 1.5 kg ha^-1(PE), pendimethalin 1.0 kg ha^-1 + anilophos 0.4 kg ha^-1(PE), pretilachlor 0.75 kg ha^-1 (PE), fenoxapropp-ethyl 0.06 kg ha-1(15 DAS) followed by 2,4-D 0.5 kg ha^-1 (30 DAS), anilophos 0.4 kg ha^-1 (10 DAS) and two hand weedings (20 and 40 DAS) with weed free and weedy check treatments were evaluated in direct seeded unpuddled rice at Crop Research Centre, G.B. Pant University of Agriculture and Technology, Pantnagar during wet season of 2006 and 2007. Echinochloa colonum among grasses and Commelina benghalensis, Caesulia axillaris among non-grasses and Cyperus rotundus among sedges were the predominant weed species in the experimental plot. Highest nutrients uptake by crop (27.1, 8.1 and 68.4 kg ha^-1 and 29.0, 8.1 and 69.1 kg ha^-1 nitrogen, phosphorus and potassium during 2006 and 2007, respectively) was recorded from 20 June sown rice crop over rest two sowing dates (05 June and 05 July) during both the years. Use of herbicides increased nutrient uptake by rice and decreased nutrient uptake by weeds. Uptake of Nutrients was higher by rice and lowest by weeds with hand weedings and pre-emergence application of pendimethalin @ 1.0 kg ha^-1 + anilophos @ 0.4 kg ha^-1 over rest of the treatments. Reduction in grain yield of rice due to uncontrolled weeds in weedy plots was 70.4 per cent during 2006 and 67.4 per cent during 2007.