Availability of a Cationic Herbicide Adsorbed on Clay Minerals to Cucumber Seedlings

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Science  03 Jun 1966:
Vol. 152, Issue 3727, pp. 1400-1402
DOI: 10.1126/science.152.3727.1400


Montmorillonitic and kaolinitic clays are effective in decreasing the toxicity of paraquat, an organic cation, to cucumber plants. The cation was adsorbed on the surface of the kaolinite clay particles and slowly became available to the plants. When it was adsorbed in the interlayer spacings of the montmorillonite clay, however, it was not available to the plants.