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Weeds are a severe threat to sustainable crop production and although herbicides provide effective weed control, environmental and health concerns push for alternate means of weed control. Allelopathy offers an economical, effective, and environmental-friendly approach to weed management. This experimental study determined the herbicidal activity of Oryza sativa L. var. NSIC RC 218 SR (rice) straw methanolic extract to the growth of Echinochloa crus-galli L. (barnyard grass) in terms of germination percentage, height, leaf number, leaf area, root length, root mass/number, shoot mass.
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