HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Ruhe, R. V. Articles by Riecken, F. F. Search for Related Content PubMed Articles by Ruhe, R. V. Articles by Riecken, F. F. Agricola Articles by Ruhe, R. V. Articles by Riecken, F. F.

Profile Characteristics of Some Loess-Derived Soils and Soil Aeration¹

ABSTRACT

Inferences are made in evaluating soil drainage conditions from morphological characteristics of soils, such as mottles and deoxidized zones. These characteristics are not infallible criteria for indicating drainage conditions, and an evaluation of local and regional relationships often is necessary for a proper interpretation. An excellent example of the need for such an evaluation is afforded by a study of weathering zones in Wisconsin loess in southwestern Iowa. A repeated occurrence in regional distribution of two deoxidized zones, the upper one surmounted by an abundantly mottled zone, was observed in the Wisconsin loess. The present positions of these deoxidized zones are moderately well or well drained, indicating that they are not related genetically to the present environment but are relict from a preexisting environment of poorer drainage. Well-drained soils occurring on the modern landscape frequently are mottled in the B and C horizons. This mottling in the profiles is interpreted as an incidental morphological characteristic and not related genetically to the profile development, but inherited from a pre-existing environment of poorer drainage.

¹ Joint contribution of the Soil Survey, Soil Conservation Service, U.S.D.A., and the Agronomy Dept., Iowa Agr. Exp. Sta. Journal Paper No. J-2613 Iowa Agr. Exp. Sta., Ames, Iowa, Project Nos. 1151, 1250.

² Research Geologist, the Soil Survey, Soil Conservation Service, U.S.D.A.; Research Associate, Iowa Agr. Exp. Sta. and Soil Scientist, Soil Conservation Service; and Professor of Soils, Iowa Agr. Exp. Sta., respectively.

Received for publication October 26, 1954.

This article has been cited by other articles:

				Z.-D. Feng and H. B. Wang Pedostratigraphy and Carbonate Accumulation in the Last Interglacial Pedocomplex of the Chinese Loess Plateau Soil Sci. Soc. Am. J., June 2, 2005; 69(4): 1094 - 1101. [Abstract] [Full Text] [PDF]