Abstract
The field experiment was conducted during 2015–16 and 2016–17 at Norman E. Borlaug Crop Research Center, Pantnagar GB Pant University of Agriculture & Technology, Pantnagar, U.S. Nagar (Uttarakhand) India, to study the crop intensification and establishment techniques influence on weed management under irrigated rice-wheat system. The experiment was laid out in a randomized block design with nine treatments and replicated thrice. The nine cropping sequence were evaluated for productivity. Density of these weeds was significantly affected by crop intensification and establishment techniques during both the years. In Kharif season, total weed density was recorded significantly lower in treatment rice (TPR) - wheat while the highest total weed density was recorded in rice (DSR) -vegetable pea - maize grain treatment during both the years. Weed density as affected by crop rotations maize (B) (cob + fodder) + cowpea (B) + sesbania (F)-2:1:2 - vegetable pea (B) + toria (F)- 3:1 - groundnut (B) + mentha was found to be the the superior in terms of weed suppression.
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