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Class: SoilLayer

Detailed soil properties at a specific depth layer. Each Soil Mapping Unit

can have multiple layers (typically D1 through D7) representing different

soil horizons from surface to depth.

__

Contains comprehensive physical properties (texture, bulk density), chemical

properties (pH, organic carbon, nutrients), and cation exchange characteristics.

URI: hwsd2:SoilLayer

classDiagram class SoilLayer click SoilLayer href "../SoilLayer/" SoilLayer : add_prop SoilLayer --> "0..1" AddPropEnum : add_prop click AddPropEnum href "../AddPropEnum/" SoilLayer : alum_sat SoilLayer : awc_layer SoilLayer : botdep SoilLayer : bsat SoilLayer : bulk SoilLayer : cec_clay SoilLayer : cec_eff SoilLayer : cec_soil SoilLayer : clay SoilLayer : cn_ratio SoilLayer : coarse SoilLayer : coverage SoilLayer --> "0..1" CoverageEnum : coverage click CoverageEnum href "../CoverageEnum/" SoilLayer : drainage SoilLayer --> "0..1" DrainageEnum : drainage click DrainageEnum href "../DrainageEnum/" SoilLayer : elec_cond SoilLayer : esp SoilLayer : fao90 SoilLayer : gypsum SoilLayer : hwsd1_smu_id SoilLayer : hwsd2_smu_id SoilLayer : id SoilLayer : il SoilLayer --> "0..1" ILEnum : il click ILEnum href "../ILEnum/" SoilLayer : layer SoilLayer : nsc SoilLayer : nsc_mu_source1 SoilLayer : nsc_mu_source2 SoilLayer : org_carbon SoilLayer : ph_water SoilLayer : phase1 SoilLayer --> "0..1" PhaseEnum : phase1 click PhaseEnum href "../PhaseEnum/" SoilLayer : phase2 SoilLayer --> "0..1" PhaseEnum : phase2 click PhaseEnum href "../PhaseEnum/" SoilLayer : ref_bulk SoilLayer : root_depth_layer SoilLayer : roots SoilLayer --> "0..1" RootsEnum : roots click RootsEnum href "../RootsEnum/" SoilLayer : sand SoilLayer : sequence SoilLayer : share SoilLayer : silt SoilLayer : swr SoilLayer --> "0..1" SWREnum : swr click SWREnum href "../SWREnum/" SoilLayer : tcarbon_eq SoilLayer : teb SoilLayer : texture_soter SoilLayer --> "0..1" TextureSOTEREnum : texture_soter click TextureSOTEREnum href "../TextureSOTEREnum/" SoilLayer : texture_usda SoilLayer --> "0..1" TextureUSDAEnum : texture_usda click TextureUSDAEnum href "../TextureUSDAEnum/" SoilLayer : topdep SoilLayer : total_n SoilLayer : wise30s_smu_id SoilLayer : wrb2 SoilLayer : wrb4 SoilLayer : wrb_phases

Slots

Name Cardinality and Range Description Inheritance
id 1
Integer		 Database internal ID direct
hwsd2_smu_id 1
Integer		 Soil Mapping Unit identifier in HWSD version 2 direct
nsc_mu_source1 0..1
String		 National Soil Classification source 1 direct
nsc_mu_source2 0..1
String		 National Soil Classification source 2 direct
wise30s_smu_id 0..1
String		 Soil Mapping Unit identifier from WISE30s database direct
hwsd1_smu_id 0..1
Integer		 Soil Mapping Unit identifier from HWSD version 1 direct
coverage 0..1
CoverageEnum		 Data source coverage (ESDB, CHINA, SOTWIS, etc direct
sequence 0..1
Integer		 Sequence number in Soil Mapping Unit direct
share 0..1
Float		 Percentage share in Soil Mapping Unit direct
nsc 0..1
String		 National Soil Classification code direct
wrb_phases 0..1
String		 Detailed Soil Unit Symbol from WRB 2022 with phases direct
wrb4 0..1
String		 Soil Unit Symbol from World Reference Base 2022 (4-character code) direct
wrb2 0..1
String		 Soil Unit Symbol from WRB 2022 (2-character code) direct
fao90 0..1
String		 Soil Unit Symbol from FAO 1990 classification direct
root_depth_layer 0..1
String		 Rootable soil depth for specific layer direct
phase1 0..1
PhaseEnum		 Primary soil phase (Stony, Lithic, Petric, etc direct
phase2 0..1
PhaseEnum		 Secondary soil phase direct
roots 0..1
RootsEnum		 Obstacle to roots depth in cm (ESDB) direct
il 0..1
ILEnum		 Impermeable layer depth in cm (ESDB) direct
swr 0..1
SWREnum		 Soil Water Regime (ESDB) direct
drainage 0..1
DrainageEnum		 Reference soil drainage class direct
awc_layer 0..1
String		 Available Water Capacity for rootable soil depth direct
add_prop 0..1
AddPropEnum		 Additional soil properties (Gelic, Vertic) direct
layer 0..1
String		 Depth layer code (D1 through D7) direct
topdep 0..1
Integer		 Depth of top of layer direct
botdep 0..1
Integer		 Depth of bottom of layer direct
coarse 0..1
Float		 Coarse fragments percentage by volume direct
sand 0..1
Float		 Sand content percentage by weight direct
silt 0..1
Float		 Silt content percentage by weight direct
clay 0..1
Float		 Clay content percentage by weight direct
texture_usda 0..1
TextureUSDAEnum		 USDA soil texture class direct
texture_soter 0..1
TextureSOTEREnum		 SOTER soil texture class direct
bulk 0..1
Float		 Bulk density direct
ref_bulk 0..1
Float		 Reference bulk density direct
org_carbon 0..1
Float		 Organic carbon content percentage by weight direct
ph_water 0..1
Float		 pH measured in water direct
total_n 0..1
Float		 Total nitrogen content direct
cn_ratio 0..1
Float		 Carbon to nitrogen ratio (C/N) direct
cec_soil 0..1
Float		 Cation Exchange Capacity of soil direct
cec_clay 0..1
Float		 Cation Exchange Capacity of clay fraction direct
cec_eff 0..1
Float		 Effective Cation Exchange Capacity (ECEC) direct
teb 0..1
Float		 Total Exchangeable Bases direct
bsat 0..1
Float		 Base saturation percentage direct
alum_sat 0..1
Float		 Aluminium saturation percentage direct
esp 0..1
Float		 Exchangeable Sodium Percentage direct
tcarbon_eq 0..1
Float		 Calcium carbonate equivalent percentage by weight direct
gypsum 0..1
Float		 Gypsum content percentage by weight direct
elec_cond 0..1
Float		 Electric conductivity direct

Identifier and Mapping Information

Schema Source

  • from schema: https://w3id.org/bioepic-data/fao-soils/hwsd2

Mappings

Mapping Type Mapped Value
self hwsd2:SoilLayer
native hwsd2:SoilLayer

LinkML Source

Direct

name: SoilLayer
description: 'Detailed soil properties at a specific depth layer. Each Soil Mapping
  Unit

  can have multiple layers (typically D1 through D7) representing different

  soil horizons from surface to depth.


  Contains comprehensive physical properties (texture, bulk density), chemical

  properties (pH, organic carbon, nutrients), and cation exchange characteristics.'
from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
slots:
- id
- hwsd2_smu_id
- nsc_mu_source1
- nsc_mu_source2
- wise30s_smu_id
- hwsd1_smu_id
- coverage
- sequence
- share
- nsc
- wrb_phases
- wrb4
- wrb2
- fao90
- root_depth_layer
- phase1
- phase2
- roots
- il
- swr
- drainage
- awc_layer
- add_prop
- layer
- topdep
- botdep
- coarse
- sand
- silt
- clay
- texture_usda
- texture_soter
- bulk
- ref_bulk
- org_carbon
- ph_water
- total_n
- cn_ratio
- cec_soil
- cec_clay
- cec_eff
- teb
- bsat
- alum_sat
- esp
- tcarbon_eq
- gypsum
- elec_cond
class_uri: hwsd2:SoilLayer

Induced

name: SoilLayer
description: 'Detailed soil properties at a specific depth layer. Each Soil Mapping
  Unit

  can have multiple layers (typically D1 through D7) representing different

  soil horizons from surface to depth.


  Contains comprehensive physical properties (texture, bulk density), chemical

  properties (pH, organic carbon, nutrients), and cation exchange characteristics.'
from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
attributes:
  id:
    name: id
    description: Database internal ID
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    identifier: true
    alias: id
    owner: SoilLayer
    domain_of:
    - SoilMappingUnit
    - SoilLayer
    - WRBClass
    range: integer
    required: true
  hwsd2_smu_id:
    name: hwsd2_smu_id
    description: Soil Mapping Unit identifier in HWSD version 2
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: hwsd2_smu_id
    owner: SoilLayer
    domain_of:
    - SoilMappingUnit
    - SoilLayer
    range: integer
    required: true
  nsc_mu_source1:
    name: nsc_mu_source1
    description: National Soil Classification source 1
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: nsc_mu_source1
    owner: SoilLayer
    domain_of:
    - SoilLayer
    range: string
  nsc_mu_source2:
    name: nsc_mu_source2
    description: National Soil Classification source 2
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: nsc_mu_source2
    owner: SoilLayer
    domain_of:
    - SoilLayer
    range: string
  wise30s_smu_id:
    name: wise30s_smu_id
    description: Soil Mapping Unit identifier from WISE30s database
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: wise30s_smu_id
    owner: SoilLayer
    domain_of:
    - SoilMappingUnit
    - SoilLayer
    range: string
  hwsd1_smu_id:
    name: hwsd1_smu_id
    description: Soil Mapping Unit identifier from HWSD version 1
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: hwsd1_smu_id
    owner: SoilLayer
    domain_of:
    - SoilMappingUnit
    - SoilLayer
    range: integer
  coverage:
    name: coverage
    description: Data source coverage (ESDB, CHINA, SOTWIS, etc.)
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: coverage
    owner: SoilLayer
    domain_of:
    - SoilMappingUnit
    - SoilLayer
    range: CoverageEnum
  sequence:
    name: sequence
    description: Sequence number in Soil Mapping Unit
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: sequence
    owner: SoilLayer
    domain_of:
    - SoilLayer
    range: integer
  share:
    name: share
    description: Percentage share in Soil Mapping Unit
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: share
    owner: SoilLayer
    domain_of:
    - SoilMappingUnit
    - SoilLayer
    range: float
    minimum_value: 0
    maximum_value: 100
    unit:
      ucum_code: '%'
  nsc:
    name: nsc
    description: National Soil Classification code
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: nsc
    owner: SoilLayer
    domain_of:
    - SoilLayer
    range: string
  wrb_phases:
    name: wrb_phases
    description: Detailed Soil Unit Symbol from WRB 2022 with phases
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: wrb_phases
    owner: SoilLayer
    domain_of:
    - SoilMappingUnit
    - SoilLayer
    range: string
  wrb4:
    name: wrb4
    description: Soil Unit Symbol from World Reference Base 2022 (4-character code)
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: wrb4
    owner: SoilLayer
    domain_of:
    - SoilMappingUnit
    - SoilLayer
    range: string
  wrb2:
    name: wrb2
    description: Soil Unit Symbol from WRB 2022 (2-character code)
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: wrb2
    owner: SoilLayer
    domain_of:
    - SoilMappingUnit
    - SoilLayer
    range: string
  fao90:
    name: fao90
    description: Soil Unit Symbol from FAO 1990 classification
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: fao90
    owner: SoilLayer
    domain_of:
    - SoilMappingUnit
    - SoilLayer
    range: string
  root_depth_layer:
    name: root_depth_layer
    description: Rootable soil depth for specific layer
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: root_depth_layer
    owner: SoilLayer
    domain_of:
    - SoilLayer
    range: string
  phase1:
    name: phase1
    description: Primary soil phase (Stony, Lithic, Petric, etc.)
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: phase1
    owner: SoilLayer
    domain_of:
    - SoilMappingUnit
    - SoilLayer
    range: PhaseEnum
  phase2:
    name: phase2
    description: Secondary soil phase
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: phase2
    owner: SoilLayer
    domain_of:
    - SoilMappingUnit
    - SoilLayer
    range: PhaseEnum
  roots:
    name: roots
    description: Obstacle to roots depth in cm (ESDB)
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: roots
    owner: SoilLayer
    domain_of:
    - SoilMappingUnit
    - SoilLayer
    range: RootsEnum
  il:
    name: il
    description: Impermeable layer depth in cm (ESDB)
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: il
    owner: SoilLayer
    domain_of:
    - SoilMappingUnit
    - SoilLayer
    range: ILEnum
  swr:
    name: swr
    description: Soil Water Regime (ESDB)
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: swr
    owner: SoilLayer
    domain_of:
    - SoilLayer
    range: SWREnum
  drainage:
    name: drainage
    description: Reference soil drainage class
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: drainage
    owner: SoilLayer
    domain_of:
    - SoilMappingUnit
    - SoilLayer
    range: DrainageEnum
  awc_layer:
    name: awc_layer
    description: Available Water Capacity for rootable soil depth
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: awc_layer
    owner: SoilLayer
    domain_of:
    - SoilLayer
    range: string
    unit:
      ucum_code: mm
  add_prop:
    name: add_prop
    description: Additional soil properties (Gelic, Vertic)
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: add_prop
    owner: SoilLayer
    domain_of:
    - SoilMappingUnit
    - SoilLayer
    range: AddPropEnum
  layer:
    name: layer
    description: Depth layer code (D1 through D7)
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: layer
    owner: SoilLayer
    domain_of:
    - SoilLayer
    range: string
    pattern: ^D[1-7]$
  topdep:
    name: topdep
    description: Depth of top of layer
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: topdep
    owner: SoilLayer
    domain_of:
    - SoilLayer
    range: integer
    minimum_value: 0
    unit:
      ucum_code: cm
  botdep:
    name: botdep
    description: Depth of bottom of layer
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: botdep
    owner: SoilLayer
    domain_of:
    - SoilLayer
    range: integer
    minimum_value: 0
    unit:
      ucum_code: cm
  coarse:
    name: coarse
    description: Coarse fragments percentage by volume
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: coarse
    owner: SoilLayer
    domain_of:
    - SoilLayer
    range: float
    minimum_value: 0
    maximum_value: 100
    unit:
      ucum_code: '% volume'
  sand:
    name: sand
    description: Sand content percentage by weight
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: sand
    owner: SoilLayer
    domain_of:
    - SoilLayer
    range: float
    minimum_value: 0
    maximum_value: 100
    unit:
      ucum_code: '% weight'
  silt:
    name: silt
    description: Silt content percentage by weight
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: silt
    owner: SoilLayer
    domain_of:
    - SoilLayer
    range: float
    minimum_value: 0
    maximum_value: 100
    unit:
      ucum_code: '% weight'
  clay:
    name: clay
    description: Clay content percentage by weight
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: clay
    owner: SoilLayer
    domain_of:
    - SoilLayer
    range: float
    minimum_value: 0
    maximum_value: 100
    unit:
      ucum_code: '% weight'
  texture_usda:
    name: texture_usda
    description: USDA soil texture class
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: texture_usda
    owner: SoilLayer
    domain_of:
    - SoilMappingUnit
    - SoilLayer
    range: TextureUSDAEnum
  texture_soter:
    name: texture_soter
    description: SOTER soil texture class
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: texture_soter
    owner: SoilLayer
    domain_of:
    - SoilLayer
    range: TextureSOTEREnum
  bulk:
    name: bulk
    description: Bulk density
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: bulk
    owner: SoilLayer
    domain_of:
    - SoilLayer
    range: float
    minimum_value: 0
    maximum_value: 3
    unit:
      ucum_code: g/cm3
  ref_bulk:
    name: ref_bulk
    description: Reference bulk density
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: ref_bulk
    owner: SoilLayer
    domain_of:
    - SoilLayer
    range: float
    minimum_value: 0
    maximum_value: 3
    unit:
      ucum_code: g/cm3
  org_carbon:
    name: org_carbon
    description: Organic carbon content percentage by weight
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: org_carbon
    owner: SoilLayer
    domain_of:
    - SoilLayer
    range: float
    minimum_value: 0
    maximum_value: 100
    unit:
      ucum_code: '% weight'
  ph_water:
    name: ph_water
    description: pH measured in water
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: ph_water
    owner: SoilLayer
    domain_of:
    - SoilLayer
    range: float
    minimum_value: 0
    maximum_value: 14
    unit:
      ucum_code: -log(H+)
  total_n:
    name: total_n
    description: Total nitrogen content
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: total_n
    owner: SoilLayer
    domain_of:
    - SoilLayer
    range: float
    minimum_value: 0
    unit:
      ucum_code: g/kg
  cn_ratio:
    name: cn_ratio
    description: Carbon to nitrogen ratio (C/N)
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: cn_ratio
    owner: SoilLayer
    domain_of:
    - SoilLayer
    range: float
    minimum_value: 0
  cec_soil:
    name: cec_soil
    description: Cation Exchange Capacity of soil
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: cec_soil
    owner: SoilLayer
    domain_of:
    - SoilLayer
    range: float
    minimum_value: 0
    unit:
      ucum_code: cmolc/kg
  cec_clay:
    name: cec_clay
    description: Cation Exchange Capacity of clay fraction
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: cec_clay
    owner: SoilLayer
    domain_of:
    - SoilLayer
    range: float
    minimum_value: 0
    unit:
      ucum_code: cmolc/kg
  cec_eff:
    name: cec_eff
    description: Effective Cation Exchange Capacity (ECEC)
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: cec_eff
    owner: SoilLayer
    domain_of:
    - SoilLayer
    range: float
    minimum_value: 0
    unit:
      ucum_code: cmolc/kg
  teb:
    name: teb
    description: Total Exchangeable Bases
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: teb
    owner: SoilLayer
    domain_of:
    - SoilLayer
    range: float
    minimum_value: 0
    unit:
      ucum_code: cmolc/kg
  bsat:
    name: bsat
    description: Base saturation percentage
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: bsat
    owner: SoilLayer
    domain_of:
    - SoilLayer
    range: float
    minimum_value: 0
    maximum_value: 100
    unit:
      ucum_code: '% CECsoil'
  alum_sat:
    name: alum_sat
    description: Aluminium saturation percentage
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: alum_sat
    owner: SoilLayer
    domain_of:
    - SoilLayer
    range: float
    minimum_value: 0
    maximum_value: 100
    unit:
      ucum_code: '% ECEC'
  esp:
    name: esp
    description: Exchangeable Sodium Percentage
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: esp
    owner: SoilLayer
    domain_of:
    - SoilLayer
    range: float
    minimum_value: 0
    maximum_value: 100
    unit:
      ucum_code: '%'
  tcarbon_eq:
    name: tcarbon_eq
    description: Calcium carbonate equivalent percentage by weight
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: tcarbon_eq
    owner: SoilLayer
    domain_of:
    - SoilLayer
    range: float
    minimum_value: 0
    maximum_value: 100
    unit:
      ucum_code: '% weight'
  gypsum:
    name: gypsum
    description: Gypsum content percentage by weight
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: gypsum
    owner: SoilLayer
    domain_of:
    - SoilLayer
    range: float
    minimum_value: 0
    maximum_value: 100
    unit:
      ucum_code: '% weight'
  elec_cond:
    name: elec_cond
    description: Electric conductivity
    from_schema: https://w3id.org/bioepic-data/fao-soils/hwsd2
    rank: 1000
    alias: elec_cond
    owner: SoilLayer
    domain_of:
    - SoilLayer
    range: float
    minimum_value: 0
    unit:
      ucum_code: dS/m
class_uri: hwsd2:SoilLayer