SSSAJ Journal of Natural Resources and Life Sciences Education
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Published in Soil Sci Soc Am J 31:795-800 (1967)
© 1967 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
This Article
Right arrow Full Text (PDF)
Right arrow A correction has been published
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Douglas, C. L.
Right arrow Articles by Ray, B. W.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Douglas, C. L., Jr.
Right arrow Articles by Ray, B. W.
GeoRef
Right arrow GeoRef Citation
Agricola
Right arrow Articles by Douglas, C. L.
Right arrow Articles by Ray, B. W.

The Lower Boundary of Selected Mollisols1

C. L. Douglas, Jr., J. B. Fehrenbacher and B. W. Ray2

ABSTRACT

Thicknesses of three Mollisols (Tama, Elburn, and Drummer series), developed from Wisconsinan-age material in a toposequence in Central Illinois, were considerably greater (18 to 68 cm) when their lower boundaries were determined by the depth of rooting of native perennial big bluestem (Andropogon gerardi) than when determined by the lower limit of the solum. A combination of four criteria—structural development, significant clay accumulation, significant clay films, and the presence of completely unleached material—probably gave the best measure of solum thickness of these soils. However, evidence of some clay movement below the solums and the greater depth of rooting of native perennial grass, and also of such crops as corn (zea mays L.), suggests that material beneath the solum is important in the behavior, definition, and classification of many of these kinds of soils in the north-central region of the U.S.

NOTES

1 Contribution from Dep. of Agron., Illinois Agr. Exp. Sta., Urbana. Published with the approval of the Director of the Illinois Agr. Exp. Sta.

2 Formerly Graduate Assistant, Univ. of Illinois, now Soil Scientist, USDA, Snake River Conserv. Res. Center, Kimberly, Idaho; Professor and Assistant Professor, respectively, Univ. of Illinois.

Received for publication April 28, 1967. Accepted for publication June 19, 1967.






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
The SCI Journals Agronomy Journal Crop Science
Journal of Natural Resources
and Life Sciences Education		 Vadose Zone Journal
Journal of Plant Registrations Journal of
Environmental Quality		 The Plant Genome
Copyright © 1967 by the Soil Science Society of America.