High Quality Content by WIKIPEDIA articles! Sodic soils are characterized by a disproportionately high concentration of Sodium (Na) in their cation exchange complex. They are usually defined as consisting an exchangeable Sodium percentage greater than 15%. These soils tend to occur within arid to semi-arid regions and are innately unstable, exhibiting poor physical and chemical properties, which impede water infiltration, water availability, and ultimately plant growth. Sodic is an adjective of the noun Sodium, a chemical element belonging to the alkali metal group.

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