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2,4-Dichlorophenoxyacetic AcidDichlorobenzoic AcidWeed ControlPropylene Glycol Butyl EtherRedroot PigweedAmaranthus Retroflexus LBipyridinium SaltRoot GrowthCyperus EsculentusPhenoxyacetic AcidAnnual Broadleaf WeedsEther EsterGas ChromatographicHerbicideChemical ControlDigitaria SanguinalisEnvironmental FactorsSilt LoamFoliar AbsorptionCalcium Arsenate