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83:
Because soil type is a very general and widely used term, many soil classification systems do not use it for their definitions. The USDA soil taxonomy has six hierarchical levels that are named order, suborder, great group, subgroup, family, and series. The WRB calls the first level
Reference Soil
45:
In hierarchical soil classification systems, soil types mostly belong to the higher or intermediate level. A soil type can normally be subdivided into subtypes, and in many systems several soil types can be combined to entities of higher category. However, in the first classification system of the
76:. However, this is not always possible because some very initial soils may not even have a clear development of horizons. For other soils, it may be more convenient to define the soil type just referring to some properties common to the whole soil profile. For example, WRB defines the
42:, the science that deals with the systematic categorization of soils. Every soil of the world belongs to a certain soil type. Soil type is an abstract term. In nature, you will not find soil types. You will find soils that belong to a certain soil type.
53:). An example is the German soil systematics. Other systems combine characteristics resulting from soil-forming processes and characteristics inherited from the parent material. Examples are the
80:
by their sand content. Many soils are more or less strongly influenced by human activities. This is reflected by the definition of many soil types in various classification systems.
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Group. The second level in WRB is constructed by adding qualifiers, and for the result (the
Reference Soil Group plus the qualifiers), no taxonomic term is used.
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For the definition of soil types, some systems use primarily such characteristics that are the result of soil-forming processes (
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38:. All soils that share a certain set of well-defined properties form a distinctive soil type. Soil type is a technical term of
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United States (Whitney, 1909), the soil type was the lowest level and the mapping unit.
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A Compendium of On-Line Soil Survey
Information Soil Classification for Soil Survey
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213:"Australian Soil Classification, second edition (as Online Interactive Key)"
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61:. Other systems do not ask whether the properties are the result of
211:
R.F. Isbell and the
National Committee on Soil and Terrain (2016).
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A convenient way to define a soil type is referring to
173:"World Reference Base for Soil Resources, 4th edition"
145:. US Dept. Agric. Bur. Soil Bull. 55. Washington, D.C.
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1349:Australian Society of Soil Science Incorporated
1385:National Society of Consulting Soil Scientists
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126:: CS1 maint: multiple names: authors list (
116:. Borntraeger Science Publishers, Stuttgart.
112:W.E.H. Blum, P. Schad, S. Nortcliff (2018).
158:Bodenkundliche Kartieranleitung, 5. Auflage
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1359:Central Soil Salinity Research Institute
1465:Soil Science Society of America Journal
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55:World Reference Base for Soil Resources
1437:Journal of Soil and Water Conservation
898:Canadian system of soil classification
119:
7:
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1375:International Union of Soil Sciences
1402:Soil and Water Conservation Society
882:Unified Soil Classification System
414:Soil retrogression and degradation
25:
887:AASHTO Soil Classification System
1565:
1550:
1549:
1544:Knowledge (XXG):WikiProject Soil
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1430:Acta Agriculturae Scandinavica B
1370:Indian Institute of Soil Science
1354:Canadian Society of Soil Science
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1184:
360:
1408:Soil Science Society of America
171:IUSS Working Group WRB (2022).
1413:World Congress of Soil Science
1397:Soil Science Society of Poland
903:Australian Soil Classification
894:(French classification system)
67:Australian Soil Classification
1:
424:Soil compaction (agriculture)
187:"Keys to Soil Taxonomy 2014"
1365:German Soil Science Society
923:List of vineyard soil types
229:Soil classification systems
160:. Schweizerbart, Stuttgart.
94:List of vineyard soil types
1618:
1380:International Year of Soil
908:Polish Soil Classification
347:Environmental soil science
143:Soils of the United States
114:Essentials of soil science
65:or not. An example is the
1534:
1182:
932:Non-systematic soil types
358:
352:Agricultural soil science
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1502:Infiltration (hydrology)
1296:Geotechnical engineering
918:List of U.S. state soils
156:Ad-hoc-AG Boden (2005).
1571:List of soil scientists
913:1938 USDA soil taxonomy
892:Référentiel pédologique
876:FAO soil classification
34:is a taxonomic unit in
1342:Societies, Initiatives
564:Soil water (retention)
1561:Category soil science
1245:Soil salinity control
1326:Agricultural science
1220:Soil guideline value
1044:Calcareous grassland
621:World Reference Base
1422:Scientific journals
613:Soil classification
554:Soil organic matter
515:Pore water pressure
141:M. Whitney (1909).
40:soil classification
1517:Impervious surface
797:USDA soil taxonomy
623:for Soil Resources
510:Pore space in soil
453:Soil acidification
409:Soil contamination
59:USDA soil taxonomy
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470:Soil biodiversity
317:Soil microbiology
16:(Redirected from
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1391:OPAL Soil Centre
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1492:Land management
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1316:Earth materials
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1250:Erosion control
1235:Soil governance
1215:Soil management
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1149:Subaqueous soil
1134:Serpentine soil
994:Parent material
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419:Soil compaction
387:Soil morphology
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63:soil formation
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193:on 2018-11-28
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1602:Horticulture
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1311:Biogeography
1306:Hydrogeology
1281:Geochemistry
1203:Applications
1099:Martian soil
575:
527:Soil horizon
500:Soil texture
475:Soil quality
431:Soil sealing
404:Soil erosion
332:Soil physics
327:Soil ecology
322:Soil zoology
312:Soil biology
270:Soil science
206:
195:. Retrieved
191:the original
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36:soil science
31:
29:
1507:Groundwater
1321:Archaeology
1255:Agroecology
1225:Soil survey
1164:Terra rossa
1159:Terra preta
1139:Spodic soil
1059:Duplex soil
1039:Brown earth
1019:Alkali soil
1009:Rhizosphere
1004:Laimosphere
878:(1974–1998)
835:Inceptisols
742:Plinthosols
707:Kastanozems
537:Soil carbon
460:Soil health
441:Alkali soil
370:Soil topics
295:Main fields
51:pedogenesis
1586:Categories
1497:Vegetation
1240:Soil value
1144:Stagnogley
1094:Lunar soil
1049:Dark earth
1034:Brickearth
999:Pedosphere
969:Soil crust
777:Technosols
762:Solonchaks
682:Ferralsols
647:Anthrosols
522:Soil crust
495:Soil color
480:Soil value
382:Pedosphere
307:Edaphology
197:2018-12-03
100:References
32:soil type
18:Soil types
1526:Petrichor
1301:Hydrology
1286:Petrology
1230:Soil test
1129:Quicksand
1074:Fill dirt
1014:Bulk soil
860:Vertisols
850:Spodosols
840:Mollisols
830:Histosols
815:Aridisols
787:Vertisols
782:Umbrisols
772:Stagnosol
737:Planosols
732:Phaeozems
712:Leptosols
697:Gypsisols
687:Fluvisols
667:Chernozem
662:Cambisols
657:Calcisols
652:Arenosols
576:Soil type
465:Soil life
122:cite book
78:Arenosols
1592:Pedology
1482:Land use
1475:See also
1331:Agrology
1114:Paleosol
1029:Blue goo
984:Gypcrust
855:Ultisols
825:Gelisols
820:Entisols
810:Andisols
805:Alfisols
767:Solonetz
757:Retisols
752:Regosols
727:Nitisols
722:Luvisols
717:Lixisols
702:Histosol
692:Gleysols
677:Durisols
672:Cryosols
642:Andosols
632:Acrisols
542:Soil gas
302:Pedology
215:. CSIRO.
88:See also
1559:
1361:(India)
1276:Geology
1064:Eluvium
1024:Bay mud
989:Caliche
979:Hardpan
974:Claypan
964:Subsoil
959:Topsoil
845:Oxisols
747:Podzols
637:Alisols
625:(1998–)
448:Soil pH
281:History
1548:
1174:Yedoma
1109:Muskeg
1154:Takir
1089:Loess
286:Index
1404:(US)
1393:(UK)
1387:(US)
1119:Peat
954:Loam
949:Clay
944:Silt
939:Sand
377:Soil
128:link
1104:Mud
1588::
124:}}
120:{{
69:.
30:A
1519:/
605:e
598:t
591:v
262:e
255:t
248:v
200:.
130:)
20:)
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