The principal soil associations which occur in Iowa have been described by Simonson, Riecken, and Smith (1952). Important in southeastern Iowa are the Mahaska-Taintor and Grundy-Haig soil association areas. The major soils of these associations have been derived from loess under grass vegetation. On the state soil association map a gradational boundary between these two soil association areas is placed near the northern boundary of Jefferson County. In southwestern Iowa functional relationships existing between the morphological, physical, and chemical properties of soils and the distribution and thickness of loess have been reported for gently sloping Brunizem soils by Hutton (1948) and for nearly level soils by Ulrich (1950, 1951). A general relationship between loess thickness and profile properties for sloping members of the soil associations in southeastern Iowa has been concluded by Hunter, Riecken, and McClelland (1953).
Proceedings of the Iowa Academy of Science
©1955 Iowa Academy of Science, Inc.
Schafer, George M.
"Relation of Taintor and Haig Soil Series to Microrelief of the Buried Kansan Till Surface In Jefferson County, lowa,"
Proceedings of the Iowa Academy of Science, 62(1), 318-328.
Available at: https://scholarworks.uni.edu/pias/vol62/iss1/35