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Thesis (M.S.)--University of Nebraska--Lincoln, 1967. Department of Agronomy.


Copyright 1967, the author. Used by permission.


The morphology and micromorphology of a soil with a clayey textured B horizon were evaluated in relation to quantitative measurements of clay formation and illuviation within the soil. A profile of Hastings silt loam formed in Wisconsinan loess on a stable upland surface in south central Nebraska was selected for study. The B horizon of this profile has a sufficient increase in clay in comparison with its overlying eluvial horizon to qualify as an argillic horizon, but clay skins are not visible in the B horizon in the field. According to the new classification system, Hastings silt loam is classified in the fine, montmorillonitic, mesic family of Udic Argiustolls. It was formerly classified in the Chernozem great soil group.