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Soil Electrical Conductivity and Soil Salinity: New Formulations and Calibrations
Author(s) -
Rhoades J. D.,
Manteghi N. A.,
Shouse P. J.,
Alves W. J.
Publication year - 1989
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1989.03615995005300020020x
Subject(s) - soil science , electrical resistivity and conductivity , salinity , conductivity , soil salinity , environmental science , soil water , water content , empirical modelling , materials science , geology , chemistry , geotechnical engineering , computer science , physics , simulation , oceanography , quantum mechanics
A new model describing the relation between bulk soil electrical conductivity (EC a ), volumetric content (θ w ) and electrical conductivity of soil water (EC w ) is given along with supporting evidence for its validity. The new model distinguishes between the water and salt present in the soil in the “immobile” (fine pores) and “mobile” (large pores) phases. It provides a possible physical meaning to the transmission coefficient ( T ) previously used in an earlier model and eliminates a limitation of that model which existed under conditions of low salinity. New empirical relations are provided to estimate the parameters needed in the new and old models in order to utilize them for diagnosing soil salinity, in terms of the electrical conductivity of the extract of saturated soil pastes (EC e ).