Soil series
The actual object of classification is the so-called soil individual, or pedon.[8] A taxonomic unit is a category belonging to a specific level of a classification system.It is a conceptual entity that describes the "central nucleus"[9] or essential characteristics of a class.On the other hand, a mapping unit delineates areas of soil in the landscape (i.e. adjacent pedons or polypedons) that possess similar characteristics.[2] For example, the dominant component of the mapping unit LhE—Lily sandy loam, 15 to 35 percent slopes, very stony in the Greenbrier County, West Virginia soil survey is the Lily series, which comprises 80% of the mapping unit.
National Cooperative Soil Survey United States Department of Agriculture (USDA)Natural Resources Conservation ServiceUSDA Soil Taxonomypedogenesissoil chemistrysoil horizonssoil colorsoil texturesoil structuresoil pHsoil profileland usesedimentsHaugan, MontanaHagerstown, MarylandTennesseeKentuckyGreenbrier County, West VirginiaBibcodeSoil scienceHistoryPedologyEdaphologySoil biologySoil microbiologySoil zoologySoil ecologySoil physicsSoil mechanicsEnvironmental soil scienceAgricultural soil sciencePedosphereSoil morphologyPedodiversitySoil formationSoil erosionSoil contaminationSoil retrogression and degradationSoil compactionSoil compaction (agriculture)Soil sealingSoil salinityAlkali soilSoil acidificationSoil healthSoil lifeSoil biodiversitySoil qualitySoil valueSoil fertilitySoil resiliencePore space in soilPore water pressureSoil crustSoil horizonSoil biomantleSoil carbonSoil gasSoil respirationSoil organic matterSoil moistureSoil water (retention)Soil typeSoil classificationWorld Reference Base for Soil ResourcesAcrisolsAlisolsAndosolsAnthrosolsArenosolsCalcisolsCambisolsChernozemCryosolsDurisolsFerralsolsFluvisolsGleysolsGypsisolsHistosolKastanozemsLeptosolsLixisolsLuvisolsNitisolsPhaeozemsPlanosolsPlinthosolsPodzolsRegosolsRetisolsSolonchaksSolonetzStagnosolTechnosolsUmbrisolsVertisolsAlfisolsAndisolsAridisolsEntisolsGelisolsHistosolsInceptisolsMollisolsOxisolsSpodosolsUltisolsFAO soil classificationUnified Soil Classification SystemAASHTO Soil Classification SystemRéférentiel pédologiqueCanadian system of soil classificationAustralian Soil ClassificationPolish Soil Classification1938 USDA soil taxonomyList of U.S. state soilsList of vineyard soil typesTopsoilSubsoilClaypanHardpanGypcrustCalicheParent material