Sodic soil reclamation generally involves the application and incorporation of gypsum into the soil followed by leaching. The rate of reclamation depends on the water intake rate. This rate can become very slow due to inadequate electrolyte concentration in the soil solution to counteract the effects of exchangeable sodium on aggregate stability, clay swelling, and dispersion. Use of successive dilutions of concentrated salt solutions, the high-salt dilution method, has been shown to increase infiltration rates of a sodic soil and to provide sufficient divalent cations for its reclamation. The water requirement for the high-salt dilution method can be reduced to about 1.7 cm of water per cm of soil. The high-salt dilution technique should be considered in irrigated areas with saline drainage waters or in areas close to saline inland lakes and ocean estuaries.
