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Modification of Some Physical Characteristics of Soils with VAMA, Ferric Sulfate, and Triphenylsulfonium Chloride¹

Synopsis: Although triphenylsulfonium chloride (TPS-Cl) produced only small changes in water stable aggregation and hydraulic conductivity, it reduced the modulus of rupture values appreciably on all soils tested. Modulus of rupture values obtained from soils treated with TPS-Cl were equal to or lower than those obtained from soils treated with ferric sulfate or VAMA.

² Research Assistant and Assistant Professor, respectively, Department of Soils and Plant Nutrition, University of California, Davis, and Assistant Professor, Cornell University, Ithaca, New York.