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Some Till-Derived Chernozem Soils in Eastern North Dakota: II. Mineralogy, Micromorphology, and Development¹

ABSTRACT

Mineralogical and micromorphological studies of three soil profiles representative of the Forman, Barnes, and an Intermediate soil group (described in the first paper of this series) are presented. The mineralogy is used to evaluate the uniformity of the original materials of each soil. Calculations of the net changes in sand, silt, clay, CaCO₃ equivalent, organic matter and volume of two of the profiles and the individual horizons in each are presented and their int rpretations are discussed. There is need for improved sampling techniques and better measures of the natural variability of the materials.

¹ Authorized for publication by the Director as Journal Article No. 3590 of the Michigan Agr. Exp. Sta., East Lansing.

² Formerly, Graduate Assistant in Soil Science, Michigan State University; now, Soil Scientist, Soil Conservation Service, Mansfield, Ohio; and Professor of Soils, Michigan State University.

Received for publication March 21, 1966. Accepted for publication September 6, 1966.