Difference between revisions of "AY Honors/Soils/Answer Key"
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| − | + | [[Image:Aridisol profile.jpg|thumb|150px|right|Aridisol profile]] | |
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| − | + | '''Aridisols''' (or '''desert soils''') are a soil order in [[USA soil taxonomy]]. Aridisols (from the Latin ''aridus'', for “dry”) 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 poor concentration of [[organic matter]] (In this case decomposed material, [[humus]]). <br> | |
| − | + | Water deficiency is the major defining characteristic of Aridisols. Also required is sufficient age to exhibit sub-soil weathering and development. Imperfect 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. | |
| − | + | ==Suborders== | |
| − | + | :[[Argid]]s ([[clay]]) | |
| − | + | :Calcids ([[carbonate]]) | |
| − | + | :Cambids (tropical) | |
| − | + | :Cryrids (cold) | |
| − | + | :Durids (duripan) | |
| − | + | :[[Gypsid]]s ([[gypsum]]) | |
| − | + | :[[Salid]]s (salts) | |
| − | == | + | |
| − | + | ==See also== | |
| − | + | * [[Pedogenesis]] | |
| − | + | * [[Pedology (soil study)]] | |
| − | + | * [[Soil classification]] | |
| − | + | * [[Soil science]] | |
| − | + | * [[Soil type]] | |
| − | + | ||
| − | + | == References == | |
| − | == | + | * {{cite web | url =http://soils.usda.gov/technical/classification/orders/aridisols.html| title =Aridisols| publisher =USDA-NRCS| accessdate =2006-05-14}} |
| − | + | * {{cite web | url =http://grunwald.ifas.ufl.edu/Nat_resources/soil_orders/aridisols.htm | title =Aridisols| publisher =University of Florida | accessdate =2006-05-14}} | |
| − | + | * {{cite web | url =http://soils.ag.uidaho.edu/soilorders/aridisols.htm | title =Aridisols| publisher =University of Idaho | |
| − | + | | accessdate =2006-05-14}} | |
| − | ==References== | + | [[Category:Pedology]] |
| − | * http://soils.usda.gov/ | + | |
| − | * http:// | + | |
| − | + | {{soil-sci-stub}} | |
| − | * | + | |
| + | [[de:Aridisol]] | ||
| + | [[it:Aridisol]] | ||
Revision as of 12:26, 20 May 2007
Aridisols (or desert soils) are a soil order in USA soil taxonomy. Aridisols (from the Latin aridus, for “dry”) 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 poor concentration of organic matter (In this case decomposed material, humus).
Water deficiency is the major defining characteristic of Aridisols. Also required is sufficient age to exhibit sub-soil weathering and development. Imperfect 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.
Suborders
- Argids (clay)
- Calcids (carbonate)
- Cambids (tropical)
- Cryrids (cold)
- Durids (duripan)
- Gypsids (gypsum)
- Salids (salts)
See also
References
- "Aridisols". USDA-NRCS. http://soils.usda.gov/technical/classification/orders/aridisols.html. Retrieved 2006-05-14.
- "Aridisols". University of Florida. http://grunwald.ifas.ufl.edu/Nat_resources/soil_orders/aridisols.htm. Retrieved 2006-05-14.
- "Aridisols". University of Idaho. http://soils.ag.uidaho.edu/soilorders/aridisols.htm. Retrieved 2006-05-14.
