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- Psamment abstract "In USDA soil taxonomy, a psamment is defined as an entisol which consists basically of unconsolidated sand deposits, often found in shifting sand dunes but also in areas of very coarse-textured parent material subject to millions of years of weathering. This latter case is characteristic of the Guiana Highlands of northern South America. A psamment has no distinct soil horizons, and must consist entirely of material of loamy sand or coarser in texture. In the FAO soil classification, psamments are known as arenosols.Psamments cover 3.4% of the global land mass. They occur throughout the world, being especially abundant in the deserts of Africa and Australia and on the ancient landforms of eastern South America. Areas dominated by psamments also occur in other humid regions, notably in Florida and Nebraska (the Sand Hills). Psamments typically have very low water-holding capacities because the sand in the soil is not graded so that sands of varying coarseness are constantly mixed right through the soil. Because most sands are highly siliceous, psamments are also extremely low in all essential nutrients, most especially phosphorus and are highly acidic in all except very arid climates. Psamments formed as a result of glacial erosion (common in northern Europe) are typically of rather higher native fertility because of their youth, but are still much less fertile than most soils in the regions they are located in.The vegetation on psamments varies enormously owing to the variety of climates, but in many cases is remarkably well-adapted to the climate, as with the Fynbos of the Cape region in South Africa - famous for its remarkable biodiversity and the equally species-rich Kwongan of southwestern Western Australia. The campinas and kerangas are healthy forests typical of psamments in South America and Borneo.Few psamments are farmed, and where they are, the cost is high because of the expense of fertilization. They are always much less productive than other soils in the same region even when fertilized, and require careful management because the sand is very easily eroded.In USDA soil taxonomy, psamments are divided into: Cryopsamments: psamments that have a cryic soil temperature regime Quartzipsamments: other psamments that have, in the 0.02 to 2.0 mm fraction within the particle-size control section, a total of more than 90 percent (by weighted average) resistant minerals Torripsamments: other psamments that have an aridic (or torric) moisture regime Ustipsamments: other psamments that have an ustic moisture regime Xeropsamments: other psamments that have a xeric moisture regime Udipsamments: other psamments.↑".
- Psamment wikiPageID "1625981".
- Psamment wikiPageLength "3252".
- Psamment wikiPageOutDegree "32".
- Psamment wikiPageRevisionID "661041559".
- Psamment wikiPageWikiLink Acid.
- Psamment wikiPageWikiLink Africa.
- Psamment wikiPageWikiLink Australia.
- Psamment wikiPageWikiLink Biodiversity.
- Psamment wikiPageWikiLink Borneo.
- Psamment wikiPageWikiLink Category:Pedology.
- Psamment wikiPageWikiLink Category:Types_of_soil.
- Psamment wikiPageWikiLink Entisol.
- Psamment wikiPageWikiLink FAO_soil_classification.
- Psamment wikiPageWikiLink Fertilizer.
- Psamment wikiPageWikiLink Florida.
- Psamment wikiPageWikiLink Fynbos.
- Psamment wikiPageWikiLink Glacial_period.
- Psamment wikiPageWikiLink Guiana_Shield.
- Psamment wikiPageWikiLink Kwongan.
- Psamment wikiPageWikiLink Nebraska.
- Psamment wikiPageWikiLink Northern_Europe.
- Psamment wikiPageWikiLink Nutrient.
- Psamment wikiPageWikiLink Pedogenesis.
- Psamment wikiPageWikiLink Pedology_(soil_study).
- Psamment wikiPageWikiLink Phosphorus.
- Psamment wikiPageWikiLink Psammosere.
- Psamment wikiPageWikiLink Sand.
- Psamment wikiPageWikiLink Sandhills_(Nebraska).
- Psamment wikiPageWikiLink Soil_classification.
- Psamment wikiPageWikiLink Soil_type.
- Psamment wikiPageWikiLink South_Africa.
- Psamment wikiPageWikiLink South_America.
- Psamment wikiPageWikiLink Texture_(geology).
- Psamment wikiPageWikiLink USDA_soil_taxonomy.
- Psamment wikiPageWikiLink Ustic.
- Psamment wikiPageWikiLink Western_Australia.
- Psamment wikiPageWikiLinkText "Psamment".
- Psamment wikiPageWikiLinkText "psamment".
- Psamment wikiPageWikiLinkText "sandy soils".
- Psamment wikiPageUsesTemplate Template:Refimprove.
- Psamment wikiPageUsesTemplate Template:Reflist.
- Psamment wikiPageUsesTemplate Template:Soil_type.
- Psamment subject Category:Pedology.
- Psamment subject Category:Types_of_soil.
- Psamment comment "In USDA soil taxonomy, a psamment is defined as an entisol which consists basically of unconsolidated sand deposits, often found in shifting sand dunes but also in areas of very coarse-textured parent material subject to millions of years of weathering. This latter case is characteristic of the Guiana Highlands of northern South America. A psamment has no distinct soil horizons, and must consist entirely of material of loamy sand or coarser in texture.".
- Psamment label "Psamment".
- Psamment sameAs Q4757656.
- Psamment sameAs Psamment.
- Psamment sameAs Arenosol.
- Psamment sameAs m.05hq64.
- Psamment sameAs Ареносол.
- Psamment sameAs Q4757656.
- Psamment wasDerivedFrom Psamment?oldid=661041559.
- Psamment isPrimaryTopicOf Psamment.