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

This Article Figures Only Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in ISI Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (6) Citing Articles via Google Scholar Google Scholar Articles by Jenkinson, B. J. Articles by Lynn, W. C. Search for Related Content PubMed Articles by Jenkinson, B. J. Articles by Lynn, W. C. GeoRef GeoRef Citation Agricola Articles by Jenkinson, B. J. Articles by Lynn, W. C. Related Collections Watershed and Landscape Processes Redox Processes Soil Hydrology Pedology

DIVISION S-10—WETLAND SOILS

Soil Hydrology on an End Moraine and a Dissected Till Plain in West-Central Indiana

^a Dep. of Agronomy, Purdue Univ., 1150 Lilly, West Lafayette, IN 47907-1150
^b USDA-NRCS, Federal Bldg. Rm. 152, MS 41, 100 Centennial Mall N., Lincoln NE. 68508-3866

* Corresponding author (dfranzme{at}purdue.edu)

Soil hydrologic properties are a function of precipitation (P)-evapotranspiration relations, stratigraphy, and geomorphology. An understanding of soil hydrology helps us predict many soil and ecosystem properties. We studied soil hydrology on an end moraine and on a dissected till plain in west-central Indiana. We measured hydraulic head, water table level, redox potential (E_H), and temperature, with piezometers (0.25-, 0.50-, 1.0-, 2.0-, 4.5-m depth), observation wells, platinum electrodes (0.25-, 0.50-, and 1.0-m), and thermocouples (0.25-, 0.50-, 1.0-, and 2.0-m), respectively, in soils along two soil toposequences for 9 yr. Water table levels drop rapidly when hardwood trees first leaf out in the spring, and rise rapidly after the trees go dormant in the fall. The Thornthwaite model underestimates evapotranspiration in the forest in the spring. In the dissected plain underlain with dense till, water is held up by the slowly permeable till. Water moves from the interior of the till plain to the dissected bevel where it periodically rises within 1 m of the surface but does not cause redoximorphic features. Soils on the crest of a moraine are similar in morphology to those on the till plain bevel, but have essentially no high water table because there is no upslope contributing area to serve as a water source. In the wetter soils, reduction begins when a soil horizon becomes wet but not saturated, and proceeds more rapidly when the horizon is saturated. There is a lag period of 2 to 8 wk between initial saturation of the soil at 25 cm and minimum E_H.

Abbreviations: AE, actual evapotranspiration • E_H, reduction-oxidation (redox) potential • K_sat, saturated hydraulic conductivity • P, precipitation • PE, potential evapotranspiration • PVC, polyvinyl Cl

This article has been cited by other articles:

				B. J. Jenkinson and D. P. Franzmeier Development and Evaluation of Iron-Coated Tubes that Indicate Reduction in Soils Soil Sci. Soc. Am. J., December 2, 2005; 70(1): 183 - 191. [Abstract] [Full Text] [PDF]

				S. Fiedler and M. Sommer Water and Redox Conditions in Wetland Soils--Their Influence on Pedogenic Oxides and Morphology Soil Sci. Soc. Am. J., January 1, 2004; 68(1): 326 - 335. [Abstract] [Full Text] [PDF]