Chemical Reaction and Control of Soil Physical Properties

  • I. Shainberg
  • W. W. Emerson
  • R. Keren
Part of the Ecological Studies book series (ECOLSTUD, volume 51)


The permeability of a soil to water depends both on the exchangeable sodium percentage (ESP) of the soil and on the salt concentration of the percolating solution, tending to decrease with increasing ESP and decreasing salt concentration (Quirk and Schofield 1955, McNeal and Coleman 1966, NcNeal et al. 1968). Soil hydraulic conductivity (HC) can be maintained even at high ESP level provided that the electrical conductivity (EC) of the percolating water is above a critical (threshold) level (Quirk and Schofield 1955). Conversely, when very good quality water was applied even an ESP value of 5 was enough to cause a decrease equivalent to two orders of magnitude in the HC of 71 Australian soils (Mclntyre 1979).


Hydraulic Conductivity Electrolyte Concentration Infiltration Rate Sodium Adsorption Ratio Exchangeable Sodium Percentage 
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Authors and Affiliations

  • I. Shainberg
  • W. W. Emerson
  • R. Keren

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