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The objective was to evaluate the allelopathic upshot of brassica and barley herbage water extracts on weed suppression and grain yield of wheat. The experiment was conducted during 2007-2008 at Pir Mehr Ali Shah Arid Agriculture University, Rawalpindi using Randomized Complete Block design. The treatments were; control/un-weed check (T0), hand weeding at 30 and 60 DAS (Days after sowing) (T1), brassica herbage water extract @12 L ha-1 at 30 DAS (T2), brassica herbage water extract @12 L ha-1 at 30 and 60 DAS (T3), barley herbage water extract @12 L ha-1 at 30 DAS (T4), barley herbage water extract @ 12L ha-1 at 30 and 60 DAS (T5), brassica + barley herbage water extract @ 6+6 L ha-1 at 30 DAS (T6), brassica + barley herbage water extract @ 6+6 L ha-1 at 30 and 60 DAS (T7). Brassica and barley extracts in mixture exhibited significant inhibitory alleopathic effects by suppressing the weeds. Weed density was reduced significantly in T7 by 20.44% and 21.45% over control when data was recorded at 65 and 95 DAS, respectively. The maximum increase in grain yield was 17% over control caused by hand weeding. After hand weeding, 9.63% grain yield increase was recorded in T5. Treatment T6 caused 8.92% wheat yield increase which was followed by T7 that enhanced grain yield by 8.5% over un-weed check.

Yasir Habib, Muhammad Saleem, Syed Haider Abbas, Maqsood Qamar, A. Wahab Khan. (2011) ALLELOPATHIC EFFECT OF BRASSICA AND BARLEY EXTRACTS ON WEED SUPPRESSION AND GRAIN YIELD OF WHEAT, , Volume 08, Issue 1.
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