Abstract
AbstractSoil pH, temperature, organic matter, and clay affected the amount of 3‐(3,4‐dichlorophenyl)‐l,l‐dimethylurea (diuron) and its metabolites in the roots and shoots of 14‐day‐old oat seedlings grown in a modified Lakeland sandy loam soil. An increase in soil pH resulted in greater amounts of diuron in the shoots. To a lesser extent, increased soil organic matter and reduced soil temperature also influenced herbicide content of shoots. In contrast, herbicide content of roots was independent of pH, organic matter, or temperature modifications. The compounds actually measured in the shoots were identified as the parent diuron molecule and the monomethyl derivative 3‐(3,4‐dichlorophenyl)‐l‐methylurea. The identities were confirmed by co‐chromatography with authentic materials in comparison to 14C compounds found in the shoots.
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