Soil type
For the definition of soil types, some systems use primarily such characteristics that are the result of soil-forming processes (pedogenesis).For example, WRB defines the Arenosols by their sand content.This is reflected by the definition of many soil types in various classification systems.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 Group.
soil sciencesoil classificationpedogenesisWorld Reference Base for Soil ResourcesUSDA soil taxonomysoil formationAustralian Soil Classificationsoil horizonsArenosolsList of vineyard soil typesHistoryPedologyEdaphologySoil biologySoil microbiologySoil zoologySoil ecologySoil physicsSoil mechanicsSoil chemistryEnvironmental soil scienceAgricultural soil sciencePedosphereSoil morphologyPedodiversitySoil erosionSoil contaminationSoil retrogression and degradationSoil compactionSoil compaction (agriculture)Soil sealingSoil salinityAlkali soilSoil pHSoil acidificationSoil healthSoil lifeSoil biodiversitySoil qualitySoil valueSoil fertilitySoil resilienceSoil colorSoil textureSoil structurePore space in soilPore water pressureSoil crustSoil horizonSoil biomantleSoil carbonSoil gasSoil respirationSoil organic matterSoil moistureSoil water (retention)AcrisolsAlisolsAndosolsAnthrosolsCalcisolsCambisolsChernozemCryosolsDurisolsFerralsolsFluvisolsGleysolsGypsisolsHistosolKastanozemsLeptosolsLixisolsLuvisolsNitisolsPhaeozemsPlanosolsPlinthosolsPodzolsRegosolsRetisolsSolonchaksSolonetzStagnosolTechnosolsUmbrisolsVertisolsAlfisolsAndisolsAridisolsEntisolsGelisolsHistosolsInceptisolsMollisolsOxisolsSpodosolsUltisolsFAO soil classificationUnified Soil Classification SystemAASHTO Soil Classification SystemRéférentiel pédologiqueCanadian system of soil classificationPolish Soil Classification1938 USDA soil taxonomyList of U.S. state soilsTopsoilSubsoilClaypanHardpanGypcrustCalicheParent materialLaimosphereRhizosphereBulk soilBay mudBlue gooBrickearthBrown earthCalcareous grasslandDark earthDry quicksandDuplex soilEluviumExpansive clay