Geoelectrical Investigation of Seasonal Moister Variations a Vertisol.

Vertisols are complex soils with high clay content (>30%), high shrink–swell potential, and microrelief features known as gilgai. We applied field and laboratory electrical-resistivity measurements to characterize seasonal wetting and drying of a Texas Vertisol, and to quantify the effects of gilgai and cracks on seasonal hydrodynamics of the soil.