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Determining Soil Salinity from Soil and Soil-Paste Electrical Conductivities: Sensitivity Analysis of Models

USDA-ARS, U.S. Salinity Lab., 4500 Glenwood Dr., Riverside, CA. 92501

*Corresponding author.

ABSTRACT

Models and relations used to determine soil salinity (EC_e) in the field from measurements of bulk soil electrical conductivity (EC_a), or from saturated soil-paste electrical conductivity (EC_p), and estimates of other influential soil parameters were analyzed to evaluate the degree to which salinity appraisal is affected by inaccuracies made in the estimates. Results show that the values of the parameters which can not be easily measured in the field (i.e., bulk density (_b), particle density (_s), clay percentage (% clay), and total and "immobile" volumetric soil water contents (_w and _ws, respectively) can be estimated sufficiently accurately for the purposes of practical soil salinity appraisal.

Received for publication August 22, 1988.