Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/Soil_horizon> ?p ?o }
- Soil_horizon abstract "A soil horizon is a layer generally parallel to the soil crust, whose physical characteristics differ from the layers above and beneath. Each soil type usually has three or four horizons. Horizons are defined in most cases by obvious physical features, chiefly colour and texture. These may be described both in absolute terms (particle size distribution for texture, for instance) and in terms relative to the surrounding material (i.e., \"coarser\" or \"sandier\" than the horizons above and below). The differentiation of the soil into distinct horizons is largely the result of influences, such as air, water, solar radiation and plant material, originating at the soil-atmosphere interface. Since the weathering of the soil occurs first at the surface and works its way down, the uppermost layers have been changed the most, while the deepest layers are most similar to the original parent material.Identification and description of the horizons present at a given site is the first step in soil classification at higher levels, through the use of systems such as the USDA soil taxonomy or the Australian Soil Classification. The World Reference Base for Soil Resources lists 40 diagnostic horizons. Soil scientists often dig a large hole, called a soil pit (usually several meters deep and about a meter wide) to expose soil horizons for study.The vertical section exposing a set of horizons, from the ground surface to the parent rock, is termed a soil profile. Most soils, especially in temperate climates, conform to a similar general pattern of horizons, often represented as \"ideal\" soil in diagrams. Each main horizon is denoted by a capital letter, which may then be followed by several alphanumerical modifiers highlighting particular outstanding features of the horizon. While the general O-A-B-C-R sequence seems fairly universal, some variation exists between the classification systems in different parts of the world. In addition, the exact definition of each main horizon may differ slightly – for instance, the US system uses the thickness of a horizon as a distinguishing feature, while the Australian system does not. It should be emphasised that no one system is more correct – as artificial constructs, their utility lies in their ability to accurately describe local conditions in a consistent manner. Also, many subtropical and tropical areas have soils such as oxisols or aridisols that have very different horizons from \"ideal\" soil, or no horizons at all.".
- Soil_horizon thumbnail Profil_glebowy.jpg?width=300.
- Soil_horizon wikiPageExternalLink manual.
- Soil_horizon wikiPageExternalLink article-9343037.
- Soil_horizon wikiPageExternalLink w8594e0g.htm.
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- Soil_horizon wikiPageWikiLink Aluminium.
- Soil_horizon wikiPageWikiLink Archaea.
- Soil_horizon wikiPageWikiLink Archaeological_horizon.
- Soil_horizon wikiPageWikiLink Aridisol.
- Soil_horizon wikiPageWikiLink Arthropod.
- Soil_horizon wikiPageWikiLink Australian_Soil_Classification.
- Soil_horizon wikiPageWikiLink Bacteria.
- Soil_horizon wikiPageWikiLink Bedrock.
- Soil_horizon wikiPageWikiLink Biological_activity.
- Soil_horizon wikiPageWikiLink Bioturbation.
- Soil_horizon wikiPageWikiLink Category:Pedology.
- Soil_horizon wikiPageWikiLink Category:Soil.
- Soil_horizon wikiPageWikiLink Clay.
- Soil_horizon wikiPageWikiLink Colorfulness.
- Soil_horizon wikiPageWikiLink Diatomaceous_earth.
- Soil_horizon wikiPageWikiLink Earthworm.
- Soil_horizon wikiPageWikiLink Eluvium.
- Soil_horizon wikiPageWikiLink Enchytraeidae.
- Soil_horizon wikiPageWikiLink Fungus.
- Soil_horizon wikiPageWikiLink Geomorphology.
- Soil_horizon wikiPageWikiLink Gravel.
- Soil_horizon wikiPageWikiLink Illuvium.
- Soil_horizon wikiPageWikiLink In_situ.
- Soil_horizon wikiPageWikiLink Iron.
- Soil_horizon wikiPageWikiLink Marl.
- Soil_horizon wikiPageWikiLink Nematode.
- Soil_horizon wikiPageWikiLink Organic_matter.
- Soil_horizon wikiPageWikiLink Parent_rock.
- Soil_horizon wikiPageWikiLink Peat.
- Soil_horizon wikiPageWikiLink Rock_(geology).
- Soil_horizon wikiPageWikiLink Root.
- Soil_horizon wikiPageWikiLink Soil.
- Soil_horizon wikiPageWikiLink Soil_biomantle.
- Soil_horizon wikiPageWikiLink Soil_classification.
- Soil_horizon wikiPageWikiLink Soil_life.
- Soil_horizon wikiPageWikiLink Soil_texture.
- Soil_horizon wikiPageWikiLink Solum.
- Soil_horizon wikiPageWikiLink Stonelayer.
- Soil_horizon wikiPageWikiLink Subsoil.
- Soil_horizon wikiPageWikiLink Topsoil.
- Soil_horizon wikiPageWikiLink USDA_soil_taxonomy.
- Soil_horizon wikiPageWikiLink World_Reference_Base_for_Soil_Resources.
- Soil_horizon wikiPageWikiLink File:AlbicHorizon.JPG.
- Soil_horizon wikiPageWikiLink File:Horizons.gif.
- Soil_horizon wikiPageWikiLink File:Profil_glebowy.jpg.
- Soil_horizon wikiPageWikiLink File:Rockhead_at_Sandside_Bay,_Caithness,_Scotland.jpg.
- Soil_horizon wikiPageWikiLink File:Runoff_of_soil_&_fertilizer.jpg.
- Soil_horizon wikiPageWikiLink File:Soil_horizons.JPG.
- Soil_horizon wikiPageWikiLinkText ""O Horizon or A Horizon,"".
- Soil_horizon wikiPageWikiLinkText "A Horizon".
- Soil_horizon wikiPageWikiLinkText "A and E horizons".
- Soil_horizon wikiPageWikiLinkText "A horizon".
- Soil_horizon wikiPageWikiLinkText "B horizon".
- Soil_horizon wikiPageWikiLinkText "E horizon".
- Soil_horizon wikiPageWikiLinkText "Horizon".
- Soil_horizon wikiPageWikiLinkText "Horizonation".
- Soil_horizon wikiPageWikiLinkText "Soil Profile".
- Soil_horizon wikiPageWikiLinkText "Soil horizon".
- Soil_horizon wikiPageWikiLinkText "Soil horizon#A horizon".
- Soil_horizon wikiPageWikiLinkText "Soil horizon#B horizon".
- Soil_horizon wikiPageWikiLinkText "Soil horizon#E horizon".
- Soil_horizon wikiPageWikiLinkText "Soil horizon#O horizon".
- Soil_horizon wikiPageWikiLinkText "Soil horizon#R horizon".
- Soil_horizon wikiPageWikiLinkText "diagnostic horizons".
- Soil_horizon wikiPageWikiLinkText "diagnostic subsurface horizon".
- Soil_horizon wikiPageWikiLinkText "epipedon".
- Soil_horizon wikiPageWikiLinkText "horizon".
- Soil_horizon wikiPageWikiLinkText "horizonation".
- Soil_horizon wikiPageWikiLinkText "horizons".
- Soil_horizon wikiPageWikiLinkText "illuvial".
- Soil_horizon wikiPageWikiLinkText "kandic".
- Soil_horizon wikiPageWikiLinkText "layers of soil".
- Soil_horizon wikiPageWikiLinkText "layers".
- Soil_horizon wikiPageWikiLinkText "organic horizon".
- Soil_horizon wikiPageWikiLinkText "soil horizon".
- Soil_horizon wikiPageWikiLinkText "soil horizon".
- Soil_horizon wikiPageWikiLinkText "soil layers".
- Soil_horizon wikiPageWikiLinkText "soil profile".
- Soil_horizon wikiPageWikiLinkText "subsoil minerals".
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- Soil_horizon wikiPageUsesTemplate Template:More_footnotes.
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- Soil_horizon wikiPageUsesTemplate Template:USGovernment.
- Soil_horizon wikiPageUsesTemplate Template:Use_British_English.
- Soil_horizon subject Category:Pedology.