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Merge pull request #26 from linkml/claude/issue-24-20251111-0031
Add FAO World Reference Base (WRB) soil classification valueset
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‎src/valuesets/schema/earth_science/fao_soil.yaml‎

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name: valuesets-earth-science-fao-soil
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title: FAO Soil Classification (WRB)
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description: FAO World Reference Base (WRB) soil classification system from the Harmonized World Soil Database
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id: https://w3id.org/valuesets/earth_science/fao_soil
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prefixes:
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linkml: https://w3id.org/linkml/
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ENVO: http://purl.obolibrary.org/obo/ENVO_
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valuesets: https://w3id.org/valuesets/
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default_prefix: valuesets
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slots:
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fao_soil_type:
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description: FAO World Reference Base soil classification
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range: FAOSoilType
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enums:
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FAOSoilType:
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description: >-
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FAO World Reference Base (WRB) soil classification system.
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Based on the Harmonized World Soil Database (HWSD) version 2.
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These represent the major soil groups according to the World Reference Base for Soil Resources.
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see_also:
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- https://www.fao.org/soils-portal/data-hub/soil-classification/world-reference-base/en/
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- https://www.isric.org/explore/hwsd
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permissible_values:
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ACRISOLS:
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description: Acrisols - soils with subsurface accumulation of low-activity clays and low base saturation
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annotations:
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symbol: AC
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fao_id: 1
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color_rgb: "247,152,4"
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ALISOLS:
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description: Alisols - soils with high aluminium saturation and low base saturation
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annotations:
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symbol: AL
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fao_id: 2
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color_rgb: "255,255,190"
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ANDOSOLS:
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description: Andosols - soils developed from volcanic ash with unique physical and chemical properties
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meaning: ENVO:00002030
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annotations:
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symbol: AN
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fao_id: 3
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color_rgb: "254,0,0"
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ARENOSOLS:
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description: Arenosols - sandy soils with weak horizon development
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meaning: ENVO:00002229
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annotations:
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symbol: AR
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fao_id: 4
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color_rgb: "245,212,161"
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ANTHROSOLS:
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description: Anthrosols - soils strongly modified by human activities
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annotations:
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symbol: AT
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fao_id: 5
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color_rgb: "207,152,4"
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CHERNOZEMS:
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description: Chernozems - very dark, fertile soils with thick mollic horizon
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annotations:
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symbol: CH
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fao_id: 6
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color_rgb: "145,77,53"
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CALCISOLS:
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description: Calcisols - soils with secondary calcium carbonate accumulation
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annotations:
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symbol: CL
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fao_id: 7
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color_rgb: "254,244,0"
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CAMBISOLS:
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description: Cambisols - soils with beginning of horizon differentiation
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annotations:
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symbol: CM
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fao_id: 8
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color_rgb: "254,190,0"
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CRYOSOLS:
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description: Cryosols - soils formed under permafrost conditions
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meaning: ENVO:00000134
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annotations:
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symbol: CR
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fao_id: 9
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color_rgb: "75,61,172"
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FLUVISOLS:
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description: Fluvisols - soils developed from recent alluvial deposits
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meaning: ENVO:00002269
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annotations:
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symbol: FL
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fao_id: 10
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color_rgb: "0,254,253"
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FERRALSOLS:
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description: Ferralsols - highly weathered soils with low-activity clay minerals
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annotations:
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symbol: FR
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fao_id: 11
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color_rgb: "255,135,33"
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GLACIERS:
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description: Glaciers - areas covered by permanent ice
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meaning: ENVO:00000133
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annotations:
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symbol: GG
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fao_id: 12
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color_rgb: "212,212,212"
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GLEYSOLS:
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description: Gleysols - soils with permanent or temporary waterlogging
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meaning: ENVO:00002234
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annotations:
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symbol: GL
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fao_id: 13
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color_rgb: "128,131,217"
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GYPSISOLS:
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description: Gypsisols - soils with secondary gypsum accumulation
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annotations:
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symbol: GY
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fao_id: 14
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color_rgb: "254,246,164"
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HISTOSOLS:
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description: Histosols - soils formed from organic materials (peat soils)
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meaning: ENVO:00005774
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annotations:
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symbol: HS
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fao_id: 15
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color_rgb: "112,107,102"
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KASTANOZEMS:
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description: Kastanozems - soils with chestnut-colored mollic horizon
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annotations:
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symbol: KS
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fao_id: 17
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color_rgb: "202,147,127"
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LEPTOSOLS:
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description: Leptosols - shallow soils over hard rock or highly calcareous material
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annotations:
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symbol: LP
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fao_id: 18
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color_rgb: "209,209,209"
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LUVISOLS:
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description: Luvisols - soils with clay illuviation and high base saturation
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annotations:
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symbol: LV
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fao_id: 19
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color_rgb: "250,132,132"
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LIXISOLS:
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description: Lixisols - soils with clay illuviation and low base saturation
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annotations:
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symbol: LX
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fao_id: 20
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color_rgb: "255,190,190"
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NITISOLS:
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description: Nitisols - soils with deep, well-structured clay horizons
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annotations:
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symbol: NT
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fao_id: 21
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color_rgb: "255,167,127"
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PHAEOZEMS:
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description: Phaeozems - soils with dark mollic horizon and high base saturation
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annotations:
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symbol: PH
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fao_id: 22
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color_rgb: "189,100,70"
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PLANOSOLS:
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description: Planosols - soils with abrupt textural change and impermeable subsoil
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annotations:
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symbol: PL
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fao_id: 23
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color_rgb: "247,125,58"
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PLINTHOSOLS:
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description: Plinthosols - soils with iron-rich, humus-poor mixture that hardens irreversibly
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annotations:
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symbol: PT
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fao_id: 24
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color_rgb: "115,0,0"
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PODZOLS:
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description: Podzols - soils with subsurface accumulation of aluminium and iron complexes with organic matter (spodic horizon)
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annotations:
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symbol: PZ
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fao_id: 25
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color_rgb: "12,217,0"
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REGOSOLS:
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description: Regosols - weakly developed soils without significant horizon differentiation
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annotations:
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symbol: RG
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fao_id: 26
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color_rgb: "254,227,164"
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RETISOLS:
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description: Retisols - soils with clay migration and tonguing of overlying material
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annotations:
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symbol: RT
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fao_id: 27
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color_rgb: "254,194,194"
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SOLONCHAKS:
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description: Solonchaks - soils with high salt content
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meaning: ENVO:00005767
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annotations:
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symbol: SC
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fao_id: 28
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color_rgb: "254,0,250"
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SOLONETZ:
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description: Solonetz - soils with high exchangeable sodium content
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annotations:
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symbol: SN
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fao_id: 29
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color_rgb: "249,194,254"
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STAGNOSOLS:
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description: Stagnosols - soils with seasonal waterlogging in upper horizons
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annotations:
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symbol: ST
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fao_id: 30
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color_rgb: "64,192,233"
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TECHNOSOLS:
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description: Technosols - soils containing significant amounts of technical artifacts
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annotations:
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symbol: TC
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fao_id: 31
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color_rgb: "145,0,157"
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UMBRISOLS:
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description: Umbrisols - soils with dark acidic surface horizon
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annotations:
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symbol: UM
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fao_id: 32
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color_rgb: "115,142,127"
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VERTISOLS:
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description: Vertisols - clay-rich soils with shrink-swell properties
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meaning: ENVO:00002273
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annotations:
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symbol: VR
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fao_id: 33
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color_rgb: "197,0,255"
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OPEN_INLAND_WATER:
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description: Open inland water - areas covered by permanent water bodies
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meaning: ENVO:00000873
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annotations:
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symbol: WR
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fao_id: 34
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color_rgb: "0,0,255"
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NO_DATA:
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description: No data - areas where soil data is not available
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annotations:
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symbol: ND
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fao_id: 35
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color_rgb: "255,255,255"
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license: MIT
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see_also:
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- https://linkml.github.io/valuesets
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- https://www.fao.org/soils-portal/data-hub/soil-classification/world-reference-base/en/
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- https://www.isric.org/explore/hwsd

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