Aridisol
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| Aridisol | |
|---|---|
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| Used in | USDA soil taxonomy |
| Key process | soil carbon oxidation |
| Climate | desert, semi-arid |
Aridisols (or desert soils) are a soil order in USDA soil taxonomy.[1] Aridisols (from the Latin aridus, for "dry", and solum) form in an arid or semi-arid climate. Aridisols dominate the deserts and xeric shrublands, which occupy about one-third of the Earth's land surface. Aridisols have a very low concentration of organic matter, reflecting the paucity of vegetative production on these dry soils. Water deficiency is the central defining characteristic of Aridisols. Also required is sufficient age to exhibit subsoil weathering and development. Limited leaching in aridisols often results in one or more subsurface soil horizons in which suspended or dissolved minerals have been deposited: silicate clays, sodium, calcium carbonate, gypsum, or soluble salts. These subsoil horizons can also be cemented by carbonates, gypsum, or silica. Accumulation of salts on the surface can result in salinization.
In the World Reference Base for Soil Resources (WRB), most Aridisols belong to the Calcisols, Gypsisols, Durisols and Solonchaks.[2]
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Aridisols of the world
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Some Aridisols are found in oases
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Other Aridisols are observed in areas where the steppe passes into the semi-desert, such as in the lower Volga region
See also
References
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- ^ Page Module:Citation/CS1/styles.css has no content."Aridisols". USDA-NRCS. Archived from the original on 9 May 2006. Retrieved 2006-05-14.
- ^ Page Module:Citation/CS1/styles.css has no content.IUSS Working Group WRB (2015). "World Reference Base for Soil Resources 2014, Update 2015" (PDF). World Soil Resources Reports 106, FAO, Rome.
- Page Module:Citation/CS1/styles.css has no content."Aridisols". University of Florida. Archived from the original on September 16, 2006. Retrieved 2006-05-14.
- Page Module:Citation/CS1/styles.css has no content."Aridisols". University of Idaho. Archived from the original on 2006-09-01. Retrieved 2006-05-14.
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