Correlation of Water tables to Redoximorphic Features in the Dougherty Plain, Southwest Georgia
- L. T. West,
- J. N. Shaw,
- E. R. Blood and
- L. K. Kirkman
Because seasonal water tables impact a variety of soil uses, soil scientists need to develop better understanding of relationships between water table depth and duration and soil morphological properties. While data relating water tables to morphological features are available for selected regions, limited data are available describing these relationships for soils in the Atlantic Coastal Plain. Thus, this study was initiated to relate depth and duration of seasonal water tables to occurrence of redoximorphic features in soils of the Dougherty Plain in southwest Georgia. Eight well transects were established from summits or upper backslopes to margins of closed depressions, and the profile at each well was described and sampled from bucket auger borings. Water table depth and rainfall were measured weekly for a 26-mo period. Horizons without redoximorphic features had a mean saturation time of 4% of the monitoring period. Horizons with redox concentrations, redox depletions, and matrix chroma ≤2 were saturated for about 20, 40, and 50% of the monitoring period, respectively. While these mean periods of saturation were significantly different, elevational relationships along the transects indicate that redoximorphic features observed in soils on summits and upper backslopes occur higher in the profile than expected from duration of saturation. This suggests that redoximorphic features in these landscape positions may have been influenced by past climatic or landscape conditions that resulted in poorer drainage of these soils.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
Copyright © 1998. . Copyright © 1998 by the Soil Science Society of America, Inc., 5585 Guilford Rd., Madison, WI 53711 USA