Sodium, calcium, and magnesium changes in soils upon application of saline-sodic waters

The purpose of this research was to study the effects of different types and amount of saline-sodic waters on the cation concentration changes in solution extracts, drainage waters, and on the exchange complex of two soils differing in their textures, exchange properties, and lime content. The composition of solution extracts, drainage waters and exchange phases of both soils was closely related to the cationic composition of the irrigation waters. Salt accumulation in the soils increased with increasing salinity of the applied water. Salts were distributed uniformally with depth after 8 and 11 applications. Exchangeable sodium was directly related to the SAR of the applied solutions. The SAR of soil leachates and solution extracts increased as the amount of salt and applied water increased. The two soils responded differently to the type and amount of the applied water. Both soils released some Ca and Mg to the soil solution from the dissolution of primary minerals and cation exchange reaction. Both soils were affected by the salinity and sodicity of the applied solution.hydrology collectio