The buildup of salts in soils.
Source:
Millennium Ecosystem Assessment
Salinization occurs frequently from overirrigated soil when evaporation of water at the surface draws salts from underground rocks and soils, causing salts to crystallize and interfere with root growth.
Source: GreenFacts

Source: USDA
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GreenFacts Summary on Desertification:
Español: Salinización
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