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ABSTRACT
Field and laboratory data are presented for three Miami profiles, one undisturbed and two eroded, and two related colluvial soil profiles. The eroded soils were higher in exchangeable potassium, available phosphorus and pH than were the associated colluvial soils. Where erosion was moderate, the organic matter content was higher in the colluvial topsoil than in the cultivated upland topsoil. Where erosion was severe, the opposite was true. An organic matter content of over 2% was found in a cultivated surface horizon composed largely of C horizon material.
1 Contribution from the Department of Soils, University of Wisconsin, Madison, Wis. This work includes a portion of a thesis presented by the author in partial fulfillment of the requirements for the M.S. degree at the University of Wisconsin. Presented before Division V, Soil Science Society of America, St. Paul, Minn., Nov. 11, 1954. Received for publication Oct. 25, 1954. Credit is due to G. B. Lee, Party Chief of the soil survey of Dodge County, Wis., and F. D. Hole, Assoc. Prof. of Soils, in charge of the Soil Survey Division of the Wisconsin Geological and Natural History Survey, for their guidance throughout the course of this study.
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