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Sodic soil Soils vary depending on various chemicals present. Sodic soils are characterized by a disproportionately high concentration of sodium (Na) in their cation exchange complex. They are usually defined as containing an exchangeable sodium percentage greater than 15%. These soils tend to occur within arid to semiarid 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. Sodic soil or soil sodicity may refer to: *(Sodic) saline soil, a soil with excess salts where sodium chloride (NaCl) predominates *(Sodic) alkaline soil, a soil with a high pH (>8.5) due to the presence of excessive sodium carbonate (Na2CO3)
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Sodic soil」の詳細全文を読む
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