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Soil Salinity Assessment

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Soil Salinity Assessment

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Blurb

This paper presents updated technology for assessing soil salinity based on measurement of electrical conductivity. The technology has been extensively and successfully field tested, and it is sound, reliable, accurate and suited to a wide variety of useful applications. This required equipment is commercially available. The advocated instrumental methodology is practical, cost effective and well developed for all general applications. It is cheaper, faster and more informative than traditional methods of salinity measurement based on soil sampling and laboratory analysis.

1. Introduction
2. Determination of Soil Salinity from Aqueous Electrical Conductivity
3. Determinatioon of Soil Salinity from Soil-Paste and Bulk Soil Electrical Conductivity
4. Examble Uses of Salinity Assessment Technology
5. Operational and Equipment Costs Associated with Salinity Instrumentation Measurement Techniques
References
Annex 1 : Methods for extablishing ECe = F(ECa) Calibrations
Annex 2 : Circuitry and parts-list for soil EC-meter
Annex 3 : Equation for calculating effect of insertion-depth of four-electrodes
Annex 4 : Construction of burial-type four-electrode probe
Annex 5 : Examples of various special-use four-electrode cells and sensors
Annex 6 : Derivation of Emadj equations
Annex 7 : Device for positioning EM-38 sensor during hand-held measurements
Annex 8 : Schematic and parts-list for soil four-electrode probe
Annex 9 : Description of statistical tests for monitoring soil salinity

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