1. Soil Survey Staff.Keys to Soil Taxonomy. 12th Ed.; Natural Resources Conservation Service, USDA: Washington, DC, 2014; 359.
2. Wilding, L.Classification of soils. InHandbook of Soil Science; Sumner, M.E., Ed.; CRC Press: Boca Raton, FL, 2000; E-175–E-182.
3. Adsorption and Desorption of Indifferent Ions in Variable Charge Subsoils