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New Calibrations for Determining Soil Electrical Conductivity—Depth Relations from Electromagnetic Measurements
Author(s) -
Rhoades J. D.,
Lesch S. M.,
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/sssaj1989.03615995005300010014x
Subject(s) - san joaquin , soil science , electrical resistivity and conductivity , environmental science , salinity , soil salinity , soil water , electromagnetic induction , remote sensing , geology , hydrology (agriculture) , geotechnical engineering , physics , oceanography , quantum mechanics , electromagnetic coil
Soil salinity can be determined in the field from measurements of soil electrical conductivity (EC a ). Measurements of depth‐integrated EC a can be made remotely using electromagnetic induction (EM) techniques. A means of determining EC a for the soil depth intervals of 0 to 30, 30 to 60, 60 to 90 cm, etc., from the EM measurements is needed for salinity appraisal. The EM and EC a measurements were made at about 900 sites in the San Joaquin Valley of California. This large data set was used, along with rigorous statistical techniques, to obtain empirical coefficients used in equations to predict EC a by depth intervals within the soil profile from EM readings taken above ground. Predictions were found to be more accurate using these new coefficients rather than those previously available.