Difference between revisions of "AY Honors/Soils/Answer Key"
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| − | '''Aridisols''' 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]] | + | '''Aridisols''' 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. | 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== | ==Suborders== | ||
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:Cambidianouses (tropical) | :Cambidianouses (tropical) | ||
:Cryrids ([[cold]]) | :Cryrids ([[cold]]) | ||
| − | : | + | :Duripids (duripan) |
:[[Gypsid]]s ([[gypsum]]) | :[[Gypsid]]s ([[gypsum]]) | ||
:[[Salid]]s (salts) | :[[Salid]]s (salts) | ||
| − | |||
==See also== | ==See also== | ||
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[[Soil science]] <br> | [[Soil science]] <br> | ||
[[Soil type]] <br> | [[Soil type]] <br> | ||
| − | ==External | + | ==External links== |
| − | SSSA glossary - [http://www.soils.org/cgi-bin/gloss_search.cgi?QUERY=Aridisols aridisols]<br> | + | [[Soil Science Society of America | SSSA]] glossary - [http://www.soils.org/cgi-bin/gloss_search.cgi?QUERY=Aridisols aridisols]<br> |
USDA - NRCS - [http://soils.usda.gov/technical/classification/orders/aridisols.html aridisols]<br> | USDA - NRCS - [http://soils.usda.gov/technical/classification/orders/aridisols.html aridisols]<br> | ||
University of Idaho - [http://soils.ag.uidaho.edu/soilorders/aridisols.htm aridisols]<br> | University of Idaho - [http://soils.ag.uidaho.edu/soilorders/aridisols.htm aridisols]<br> | ||
Revision as of 21:48, 17 January 2006
Aridisols 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)
- Cambidianouses (tropical)
- Cryrids (cold)
- Duripids (duripan)
- Gypsids (gypsum)
- Salids (salts)
See also
Pedogenesis
Pedology (soil study)
Soil classification
Soil science
Soil type
External links
SSSA glossary - aridisols
USDA - NRCS - aridisols
University of Idaho - aridisols
University of Florida - aridisols
Template:Geo-term-stub
