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Solonetz, Solonets
Soils that are defined by an accumulation of sodium salts and readily displaceable sodium ions bound to soil particles in a layer below the surface horizon (uppermost layer).

This subsurface layer also contains a significant amount of accumulated clay and because of the high sodium content and dense, clay-rich subsoil, irrigated agriculture of these soils requires extensive reclamation through leaching with fresh water and the construction of engineered drainage systems.

Occupying about one percent of the continental land area on earth (northeastern Argentina, Chile, and the coastal edges of every continent), Solonetz soils occur in dry climatic zones and on parent materials either naturally enriched in sodium-bearing minerals or influenced by saline waters.

Solonetz soils are related to the sodium-accumulating Aridisols and Mollisols of the U.S. Soil Taxonomy and because they do not require a warm climate in order to form, so they can be found in association with both Solonchaks and Kastanozems, two FAO soil groups that form in warm and temperate climatic zones.

2. From the classification system of the Food and Agriculture Organization, FAO.
3. Etymology: from Russian sol etz, "strongly salty, salt marsh, salt lake".
This entry is located in the following unit: sol-, -sol + (page 6)