Salt thickness refers to the depth of the soil profile at which soluble salts are present in significant concentrations. This property is particularly important in regions subject to evaporation and capillary rise, where salts accumulate near the surface or at specific depths. Salt thickness can impact soil fertility and water retention, as the concentrated salts can inhibit root growth and water uptake. This property is commonly determined through soil sampling and electrical conductivity measurements at various depths. Source: United States Salinity Laboratory Staff. (1954). Diagnosis and Improvement of Saline and Alkali Soils. U.S. Department of Agriculture Handbook No. 60.
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