▪ FAO soil group
 one of the 30 soil groups in the classification system of the Food and Agriculture Organization (FAO) (soil). Solonetz soils 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 (clay mineral). 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 1 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 (Aridisol) and Mollisols (Mollisol) of the U.S. Soil Taxonomy. Because they do not require a warm climate in order to form, they can be found in association with both Solonchaks (Solonchak) and Kastanozems (Kastanozem), two FAO soil groups that form in warm and temperate climatic zones, respectively.

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Universalium. 2010.

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  • Solonetz — ( ru. Солонец) is a type of soil in FAO soil classification. They have, within the upper 100 cm of the soil profile, a so called natric horizon (natrium is the chemical term for sodium). There is a subsurface horizon (subsoil), higher in clay… …   Wikipedia

  • solonetz — ● solonetz nom masculin (russe solonets) Sol halomorphe ou sol sodique dans lequel le sodium est présent dans la solution du sol et fixé sur le complexe absorbant en quantité importante (pH supérieur à 8). solonetz [sɔlɔnɛts] n. m. invar. ÉTYM.… …   Encyclopédie Universelle

  • Solonetz — Vegetation auf einem Solonetz in Podersdorf Solonetz (russisch Солонец; Transkription Solonez), vielfach auch Schwarzalkaliboden, wird ein Grundwasserboden in semihumiden bis semiariden Gebieten genannt, der durch hohe Natriumgehalte im Unt …   Deutsch Wikipedia

  • Solonetz — Le solonetz (du russe : Солонец) est un type de sol riche en sodium avec accumulation d argile en subsurface. Voir aussi Liste des sols Salinisation Solonchak Gleysol Kastanozem Liens externes (en) World Referen …   Wikipédia en Français

  • solonetz — noun A type of soil with a so called natric horizon within the upper metre of the soil profile and a subsoil with higher clay content than the upper horizon, the latter having more than 15% exchangeable sodium …   Wiktionary

  • solonetz — so|lo|netz Mot Agut Nom masculí …   Diccionari Català-Català

  • solonetz — sol·o·netz …   English syllables

  • solonetz — …   Useful english dictionary

  • Schwarzalkaliboden — Vegetation auf einem Solonetz in Podersdorf Solonetz (Schwarzalkaliboden) wird ein Grundwasserboden in semihumiden bis semiariden Gebieten genannt. Der Solonetz Boden weist eine hohe Natriumsättigung auf und ähnelt in der Abfolge der… …   Deutsch Wikipedia

  • Canadian system of soil classification — The Canadian system of soil classification is more closely related to the American system than any other. They differ in several ways. The Canadian system is designed to cover only Canadian soils. The Canadian system dispenses with a sub order… …   Wikipedia

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