Estimating soil profile depth with apparent electrical conductivity for a Texas Vertisol Academic Article uri icon

abstract

  • This study aimed to develop a relationship between apparent electrical conductivity (ECa) and soil profile depth in a shrinking-swelling central Texas Vertisol. A strong relationship (R2 = 0.73) between ECa and soil profile depth to the carbonate layer showed that soil profile depth could be estimated using ECa measurements in these soils. This relationship best predicted profile depth when soils were near field capacity and moisture-related electrical conductivity was high. A high correlation (R2 = 0.69) between two mapped ECa datasets gathered under comparatively wet and dry conditions, showed temporal and spatial stability of ECa variation patterns. Using the relationship between ECa and soil profile depth along with mapped ECa data, ECa variation patterns could be related to spatial variation of soil profile depth within the field. Information about soil profile depth could be useful in crop management under rainfed conditions, especially as profile depth influences the water supplying capacity (WSC) of a soil. With a relationship between WSC and soil profile depth within a field, spatial variation patterns of mapped ECa data could be used to divide a field into zones and management units of contrasting WSC.

published proceedings

  • TRANSACTIONS OF THE ASAE

author list (cited authors)

  • Akbar, M. A., Kenimer, A. L., & Searcy, S. W.

complete list of authors

  • Akbar, MA||Kenimer, AL||Searcy, SW

publication date

  • July 2004