The salinization and sodication of the soil in the Songnen Plain is very serious. The major salts are NaHCO3 and NaCO3, and the ESP is 48.3% (Wang et al., 2004; Li et al., 2006).
The structure of this soil is very poor, and the permeability is very low: hydraulic conductivity at saturation is only 0.02–0.22 mm d−1, which is in the low water permeability range (Chi and Wang, 2010).
The salinization and sodication of the soil in the Songnen Plain is very serious. The major salts are NaHCO3 and NaCO3, and the ESP is 48.3% (Wang et al., 2004; Li et al., 2006). The structure of this soil is very poor, and the permeability is very low: hydraulic conductivity at saturation is only 0.02–0.22 mm d−1, which is in the low water permeability range (Chi and Wang, 2010).
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