الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
According to United States Department of Agriculture (USDA), salt affected soils fall into three categories, saline, sodic and saline-sodic. Saline soils have EC > 4 dSm-1, pH < 8.5, and exchangeable sodium percent (ESP) of < 15; Sodic Soils have ESP > 15%, EC < 4 dSm-1, and pH > 8.5 and Saline-Sodic Soils have high salt contents with ECe > 4 dSm-1 and high ESP > 15% and pH < 8.5. Increased soluble salt in non-saline sodic soils would lower the pH to <8.5. Methods used to reclaim salt affected soils include physical (deep ploughing, sub-soiling, sand-addition, profile inversion). Chemical addition of gypsum, calcium chloride, limestone, sulfuric acid, sulfur or iron sulphate and electric dialysis. Chemical reclamation of saline and sodic soils is the main method of reclamation. A number of means used to manage salt affected soil includes application of gypsum, light and frequent irrigation, application of high N, green manuring, and application of pyrites. The reclamation of salt-affected soils is dependent on mineralogical, physical and chemical properties of soil and irrigation water.