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Inhibitory effects of binary mixtures (at 400 µM) of R-(+)-limonene (A) and xanthoxyline (C) on seed germination and shoot and root growth of Chinese amaranth. A 0.25% aqueous solution of Tween® 80 was used as a control. Means with the same letters in the graph are not significantly different at p ≤ 0.05 level.
