Sodic soil

Soils are of various types 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 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.

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 (>9) due to the presence of excessive Sodium Carbonate (Na₂CO₃)