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soil (38), the (34), psamments (17), classification (12), are (12), and (11), other (10), edit (8), #psamment (7), wikipedia (7), sand (7), world (6), that (6), have (6), page (5), with (5), links (5), types (5), system (5), soils (5), taxonomy (5), also (5), because (5), contents (4), search (4), this (4), than (4), earth (4), usda (4), for (4), resources (4), regime (4), they (4), very (4), south (4), most (4), hide (4), move (4), sidebar (4), view (3), terms (3), material (3), reference (3), base (3), wrb (3), moisture (3), but (3), america (3), tools (3), main (3), languages (2), toggle (2), table (2), contact (2), about (2), privacy (2), policy (2), non (2), was (2), categories (2), wayback (2), short (2), description (2), wikidata (2), pedology (2), from (2), regolith (2), peat (2), terra (2), quicksand (2), mud (2), clay (2), parent (2), list (2), 1998 (2), vertisols (2), fluvisols (2), arenosols (2), iuss (2), profile (2), photos (2), external (2), 2022 (2), isbn (2), further 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psamment wikipedia jump to content main menu main menu move to sidebar hide navigation main page contents current events random article about wikipedia contact us contribute help learn to edit community portal recent changes upload file special pages search search appearance donate create account log in personal tools donate create account log in contents move to sidebar hide top 1 see also 2 references 3 further reading 4 external links toggle the table of contents psamment 7 languages deutsch español bahasa indonesia lietuvių nederlands polski српски srpski edit links article talk english read edit view history tools tools move to sidebar hide actions read edit view history general what links here related changes upload file permanent link page information cite this page get shortened url switch to legacy parser print export download as pdf printable version in other projects wikidata item appearance move to sidebar hide from wikipedia the free encyclopedia soil type in usda soil taxonomy a psamment is defined as an entisol which consists basically of unconsolidated sand deposits 1 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 world reference base for soil resources wrb most psamments belong to the arenosols however psamments of fluviatile lacustrine or marine origin belong to the fluvisols 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 see also edit pedogenesis pedology soil study psammosere soil classification soil types references edit unit 10 terms psamment archived 2009 04 10 at the wayback machine at pals iastate edu soil survey staff keys to soil taxonomy 12th edition natural resources conservation service u s department of agriculture washington d c usa 2014 iuss working group wrb world reference base for soil resources fourth edition international union of soil sciences vienna 2022 isbn 979 8 9862451 1 9 further reading edit w zech p schad g hintermaier erhard soils of the world springer berlin 2022 chapter 8 3 1 isbn 978 3 540 30460 9 external links edit profile photos with classification wrb homepage profile photos with classification iuss world of soils v t e soil classification world reference base for soil resources 1998 acrisols alisols andosols anthrosols arenosols calcisols cambisols chernozem cryosols durisols ferralsols fluvisols gleysols gypsisols histosol kastanozems leptosols lixisols luvisols nitisols phaeozems planosols plinthosols podzols regosols retisols solonchaks solonetz stagnosol technosols umbrisols vertisols usda soil taxonomy alfisols andisols aridisols entisols gelisols histosols inceptisols mollisols oxisols spodosols ultisols vertisols other systems fao soil classification 1974 1998 unified soil classification system aashto soil classification system référentiel pédologique french classification system canadian system of soil classification australian soil classification polish soil classification 1938 usda soil taxonomy list of u s state soils list of vineyard soil types pg 3 spanish classification system non systematic soil types sand silt clay loam topsoil subsoil soil crust claypan hardpan gypcrust caliche parent material pedosphere laimosphere rhizosphere bulk soil alkali soil bay mud blue goo brickearth brown earth calcareous grassland dark earth dry quicksand duplex soil eluvium expansive clay fill dirt fuller s earth hydrophobic soil loess mud muskeg paleosol peat prime farmland quicksand serpentine soil spodic soil stagnogley subaqueous soil takir terra preta terra rossa tropical peat yedoma soil on bodies other than earth lunar regolith martian regolith types of soil retrieved from https en wikipedia org w index php title psamment oldid 1305318375 categories pedology types of soil hidden categories articles with short description short description matches wikidata webarchive template wayback links this page was last edited on 11 august 2025 at 10 29 utc page was rendered with parsoid text is available under the creative commons attribution sharealike 4 0 license additional terms may apply by using this site you agree to the terms of use and privacy policy wikipedia is a registered trademark of the wikimedia foundation inc a non profit organization privacy policy about wikipedia disclaimers contact wikipedia legal safety contacts code of conduct developers statistics cookie statement mobile view search search toggle the table of contents psamment 7 languages add topic