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Field Studies in Prevention of Soil Salinization

Synopsis: In soil profiles in which salts are rising towards the surface, damage to productivity was prevented by adoption of suitable crop rotations. When the salts had risen up to 5-foot depth from the surface a 2-year rotation with one rice crop—cotton-senji, rice, wheat—was initially required to depress the salts below 6-feet depth. When the salts were below 6 feet and 8 feet, respectively, a 4-year rotation—cotton-senji, sugarcane, wheat, rice"was found adequate for keeping the salts depressed below that depth.