Chapter 3: Key to Soil Subgroups

AA. Organic Cryosol

AAA. Organic Cryosols that have an ice layer >30 cm in thickness with the upper boundary within 1 m of the surface… Glacic Organic Cryosol

AAB. Other Organic Cryosols that have a mineral contact within 1 m of the surface and mainly fibric organic material above the contact… Terric Fibric Organic Cryosol

AAC. Other Organic Cryosols that have a mineral contact within 1 m of the surface and mainly mesic organic material above the contact… Terric Mesic Organic Cryosol

AAD. Other Organic Cryosols that have a mineral contact within 1 m of the surface and mainly humic organic material above the contact… Terric Humic Organic Cryosol

AAE. Other Organic Cryosols in which the organic material is dominantly fibric below a depth of 40 cm Fibric Organic Cryosol

AAF. Other Organic Cryosols in which the organic material is dominantly mesic below a depth of 40 cmMesic Organic Cryosol

AAG. Other Organic Cryosols in which the organic material is dominantly humic below a depth of 40 cmHumic Organic Cryosol

AB. Turbic Cryosol

ABA. Turbic Cryosols that have a gleyed layer similar to soils of the Gleysolic order… Gleysolic Turbic Cryosol

ABB. Other Turbic Cryosols that have organic horizons in the upper 1 m of the solum, are >15 cm in thickness, and have a pH ≥5.5 in some or all of the B horizons… Histic Eutric Turbic Cryosol

ABC. Other Turbic Cryosols that have organic horizons in the upper 1 m of the solum, are >15 cm in thickness, and have a pH <5.5 in some or all of the B horizons… Histic Dystric Turbic Cryosol

ABD. Other Turbic Cryosols that have organic horizons in the upper 1 m of the solum, are >15 cm in thickness, and have no B horizons… Histic Regosolic Turbic Cryosol

ABE. Other Turbic Cryosols that have a Bm horizon ≥10 cm in thickness and a pH ≥5.5 in some or all of the B horizons… Brunisolic Eutric Turbic Cryosol

ABF. Other Turbic Cryosols that have a Bm horizon ≥10 cm in thickness and a pH <5.5 in some or all of the B horizons… Brunisolic Dystric Turbic Cryosol

ABG. Other Turbic Cryosols that have a Bm horizon <10 cm in thickness and a pH ≥5.5 in some or all of the B horizons… Orthic Eutric Turbic Cryosol

ABH. Other Turbic Cryosols that have a Bm horizon <10 cm in thickness and a pH <5.5 in some or all of the B horizons… Orthic Dystric Turbic Cryosol

ABI. Other Turbic Cryosols… Regosolic Turbic Cryosol

AC. Static Cryosol

ACA. Static Cryosols that have a gleyed layer similar to soils of the Gleysolic order… Gleysolic Static Cryosol

ACB. Other Static Cryosols that have organic horizons in the upper 1 m of the solum, are >15 cm in thickness, and have a pH ≥5.5 in some or all of the B horizons… Histic Eutric Static Cryosol

ACC. Other Static Cryosols that have organic horizons in the upper 1 m of the solum, are >15 cm in thickness, and have a pH <5.5 in some or all of the B horizons… Histic Dystric Static Cryosol

ACD. Other Static Cryosols that have organic horizons in the upper 1 m of the solum, are >15 cm in thickness, and have no B horizons… Histic Regosolic Static Cryosol

ACE. Other Static Cryosols that have an eluvial horizon and a Bty horizon ≥10 cm in thickness… Luvisolic Static Cryosol

ACF. Other Static Cryosols that have a Bm horizon ≥10 cm in thickness and a pH ≥5.5 in some or all of the B horizons… Brunisolic Eutric Static Cryosol

ACG. Other Static Cryosols that have a Bm horizon ≥10 cm in thickness and a pH <5.5 in some or all of the B horizons… Brunisolic Dystric Static Cryosol

ACH. Other Static Cryosols that have a Bm horizon <10 cm in thickness and a pH ≥5.5 in some or all of the B horizons… Orthic Eutric Static Cryosol

ACI. Other Static Cryosols that have a Bm horizon <10 cm in thickness and a pH <5.5 in some or all of the B horizons… Orthic Dystric Static Cryosol

ACJ. Other Static Cryosols… Regosolic Static Cryosol

BA. Folisol

BAA. Folisols that have an O horizon >10 cm in thickness below the F or H horizons… Histic Folisol

BAB. Other Folisols that have F or H horizons composed primarily of woody materials… Lignic Folisol

BAC. Other Folisols that are composed primarily of moderately decomposed F horizon within the control section… Hemic Folisol

BAD. Other Folisols that are composed primarily of well-decomposed H horizon within the control section… Humic Folisol

BB. Fibrisol

BBA. Fibrisols that have a hydric layer… Hydric Fibrisol

BBB. Other Fibrisols that have a terric layer at least 30 cm in thickness beneath the surface tier and a humic layer >12 cm in thickness within the control section… Terric Humic Fibrisol

BBC. Other Fibrisols that have a terric layer at least 30 cm in thickness beneath the surface tier and a mesic layer >25 cm in thickness within the control section… Terric Mesic Fibrisol

BBD. Other Fibrisols that have a terric layer at least 30 cm in thickness beneath the surface tier… Terric Fibrisol

BBE. Other Fibrisols that have a limnic layer >5 cm in thickness beneath the surface tier… Limnic Fibrisol

BBF. Other Fibrisols that have more than 5 cm combined thickness of cumulic layer or layers beneath the surface tier… Cumulic Fibrisol

BBG. Other Fibrisols that have a humic layer >12 cm in thickness in the middle or bottom tier… Humic Fibrisol

BBH. Other Fibrisols that have a mesic layer >25 cm in thickness in the middle or bottom tier… Mesic Fibrisol

BBI. Other Fibrisols… Typic Fibrisol

BC. Mesisol

BCA. Mesisols that have a Hydric layer… Hydric Mesisol

BCB. Other Mesisols that have a terric layer at least 30 cm in thickness beneath the surface tier and a humic layer >25 cm in thickness within the control section… Terric Humic Mesisol

BCC. Other Mesisols that have a terric layer at least 30 cm in thickness beneath the surface tier and a fibric layer >25 cm in thickness within the control section… Terric Fibric Mesisol

BCD. Other Mesisols that have a terric layer at least 30 cm in thickness beneath the surface tier… Terric Mesisol

BCE. Other Mesisols that have a limnic layer >5 cm in thickness beneath the surface tier… Limnic Mesisol

BCF. Other Mesisols that have more than 5 cm combined thickness of cumulic layer or layers beneath the surface tier… Cumulic Mesisol

BCG. Other Mesisols that have a humic layer >25 cm in thickness in the middle or bottom tier… Humic Mesisol

BCH. Other Mesisols that have a fibric layer >25 cm in thickness in the middle or bottom tier… Fibric Mesisol

BCI. Other Mesisols… Typic Mesisol

BD. Humisol

BDA. Humisols that have a hydric layer… Hydric Humisol

BDB. Other Humisols that have a terric layer at least 30 cm in thickness beneath the surface tier and a fibric layer >12 cm in thickness within the control section… Terric Fibric Humisol

BDC. Other Humisols that have a terric layer at least 30 cm in thickness beneath the surface tier and a mesic layer >25 cm in thickness within the control section… Terric Mesic Humisol

BDD. Other Humisols that have a terric layer at least 30 cm in thickness beneath the surface tier… Terric Humisol

BDE. Other Humisols that have a limnic layer >5 cm in thickness beneath the surface tier… Limnic Humisol

BDF. Other Humisols that have more than 5 cm combined thickness of cumulic layer or layers beneath the surface tier… Cumulic Humisol

BDG. Other Humisols that have a fibric layer >12 cm in thickness in the middle or bottom tier… Fibric Humisol

BDH. Other Humisols that have a mesic layer >25 cm in thickness in the middle or bottom tier… Mesic Humisol

BDI. Other Humisols… Typic Humisol

CA. Vertisol

CAA. Vertisols that have prominent mottles within 50 cm of the mineral soil surface… Gleysolic Vertisol

CAB. Other Vertisols that have faint to distinct mottles within 50 cm of the mineral soil surface… Gleyed Vertisol

CAC. Other Vertisols… Orthic Vertisol

CB. Humic Vertisol

CBA. Humic Vertisols that have prominent mottles within 50 cm of the mineral soil surface… Gleysolic Humic Vertisol

CBB. Other Humic Vertisols that have faint to distinct mottles within 50 cm of the mineral soil surface… Gleyed Humic Vertisol

CBC. Other Humic Vertisols… Orthic Humic Vertisol

DA. Humic Podzol

DAA. Humic Podzols that have an ortstein horizon at least 3 cm in thickness… Ortstein Humic Podzol

DAB. Other Humic Podzols that have a placic horizon within the control section… Placic Humic Podzol

DAC. Other Humic Podzols that have a duric horizon within the control section… Duric Humic Podzol

DAD. Other Humic Podzols that have a fragipan within the control section… Fragic Humic Podzol

DAE. Other Humic Podzols… Orthic Humic Podzol

DB. Ferro-Humic Podzol

DBA. Ferro-Humic Podzols that have an ortstein horizon at least 3 cm in thickness and have distinct to prominent mottles within 1 m of the mineral soil surface… Gleyed Ortstein Ferro-Humic Podzol

DBB. Other Ferro-Humic Podzols that have an ortstein horizon at least 3 cm in thickness… Ortstein Ferro-Humic Podzol

DBC. Other Ferro-Humic Podzols that have a placic horizon within the control section… Placic Ferro-Humic Podzol

DBD. Other Ferro-Humic Podzols that have a duric horizon within the control section… Duric Ferro-Humic Podzol

DBE. Other Ferro-Humic Podzols that have a fragipan within the control section… Fragic Ferro-Humic Podzol

DBF. Other Ferro-Humic Podzols that have a Bt horizon with its upper boundary more than 50 cm from the mineral soil surface… Luvisolic Ferro-Humic Podzol

DBG. Other Ferro-Humic Podzols that have an Ah horizon ≥10 cm in thickness and have distinct to prominent mottles within 1 m of the mineral soil surface… Gleyed Sombric Ferro-Humic Podzol

DBH. Other Ferro-Humic Podzols that have an Ah horizon ≥10 cm in thickness… Sombric Ferro-Humic Podzol

DBI. Other Ferro-Humic Podzols that have distinct to prominent mottles within 1 m of the mineral soil surface… Gleyed Ferro-Humic Podzol

DBJ. Other Ferro-Humic Podzols… Orthic Ferro-Humic Podzol

DC. Humo-Ferric Podzol

DCA. Humo-Ferric Podzols that have an ortstein horizon at least 3 cm in thickness and have distinct to prominent mottles within 1 m of the mineral soil surface… Gleyed Ortstein Humo-Ferric Podzol

DCB. Other Humo-Ferric Podzols that have an ortstein horizon at least 3 cm in thickness… Ortstein Humo-Ferric Podzol

DCC. Other Humo-Ferric Podzols that have a placic horizon within the control section… Placic Humo-Ferric Podzol

DCD. Other Humo-Ferric Podzols that have a duric horizon within the control section… Duric Humo-Ferric Podzol

DCE. Other Humo-Ferric Podzols that have a fragipan within the control section… Fragic Humo-Ferric Podzol

DCF. Other Humo-Ferric Podzols that have a Bt horizon with its upper boundary more than 50 cm from the mineral soil surface… Luvisolic Humo-Ferric Podzol

DCG. Other Humo-Ferric Podzols that have an Ah horizon ≥10 cm in thickness and distinct to prominent mottles within 1 m of the mineral soil surface… Gleyed Sombric Humo-Ferric Podzol

DCH. Other Humo-Ferric Podzols that have an Ah horizon ≥10 cm in thickness… Sombric Humo-Ferric Podzol

DCI. Other Humo-Ferric Podzols that have distinct to prominent mottles within 1 m of the mineral soil surface… Gleyed Humo-Ferric Podzol

DCJ. Other Humo-Ferric Podzols… Orthic Humo-Ferric Podzol

EA. Luvic Gleysol

EAA. Luvic Gleysols that have a slickenside horizon within 1 m of the mineral soil surface… Vertic Luvic Gleysol

EAB. Other Luvic Gleysols that have a solonetzic B horizon… Solonetzic Luvic Gleysol

EAC. Other Luvic Gleysols that have a fragipan within or below the Btg horizon… Fragic Luvic Gleysol

EAD. Other Luvic Gleysols that have a mineral-organic surface horizon that meets the requirements of the Ah or Ap horizon of Humic Gleysols… Humic Luvic Gleysol

EAE. Other Luvic Gleysols that have either a Bgf horizon ≥10 cm in thickness, as well as a Btg horizon, or a Btgf horizon… Fera Luvic Glevsol

EAF. Other Luvic Gleysols… Orthic Luvic Gleysol

EB. Humic Gleysol

EBA. Humic Gleysols that have a slickenside horizon within 1 m of the mineral soil surface… Vertic Humic Gleysol

EBB. Other Humic Gleysols that have a solonetzic B horizon… Solonetzic Humic Gleysol

EBC. Other Humic Gleysols that have a Bgf horizon ≥10 cm in thickness… Fera Humic Gleysol

EBD. Other Humic Gleysols that lack a B horizon ≥10 cm in thickness… Rego Humic Gleysol

EBE. Other Humic Gleysols… Orthic Humic Gleysol

EC. Gleysol

ECA. Gleysols that have a slickenside horizon within 1 m of the mineral soil surface… Vertic Gleysol

ECB. Other Gleysols that have a solonetzic B horizon… Solonetzic Gleysol

ECC. Other Gleysols that have a Bgf horizon ≥10 cm in thickness… Fera Gleysol

ECD. Other Gleysols that lack a B horizon ≥10 cm in thickness… Rego Gleysol

ECE. Other Gleysols… Orthic Gleysol

FA. Vertic Solonetz

FAA. Vertic Solonetzs that have an Ah, Ahe, or Ap horizon with a color value >4.5 dry, a chroma usually >1.5 dry, and faint to distinct mottles within 50 cm of the mineral soil surface… Gleyed Brown Vertic Solonetz

FAB. Other Vertic Solonetzs that have an Ah, Ahe, or Ap horizon with a color value >4.5 dry and a chroma usually >1.5 dry… Brown Vertic Solonetz

FAC. Other Vertic Solonetzs that have an Ah, Ahe, or Ap horizon with a color value of 3.5-4.5 dry, a chroma usually >1.5 dry, and faint to distinct mottles within 50 cm of the mineral soil surface… Gleyed Dark Brown Vertic Solonetz

FAD. Other Vertic Solonetzs that have an Ah, Ahe, or Ap horizon with a color value of 3.5-4.5 dry and a chroma usually >1.5 dry… Dark Brown Vertic Solonetz

FAE. Other Vertic Solonetzs that have an Ah, Ahe, or Ap horizon with a color value <3.5 dry, a chroma usually >1.5 dry, and faint to distinct mottles within 50 cm of the mineral soil surface… Gleyed Black Vertic Solonetz

FAF. Other Vertic Solonetzs that have an Ah, Ahe, or Ap horizon with a color value <3.5 dry and a chroma usually >1.5 dry… Black Vertic Solonetz

FB. Solod

FBA. Solods that have an Ah, Ahe, or Ap horizon with a color value >4.5 dry, a chroma usually >1.5, and faint to distinct mottles within 50 cm of the mineral soil surface… Gleyed Brown Solod

FBB. Other Solods that have an Ah, Ahe, or Ap horizon with a color value >4.5 dry and a chroma usually >1.5… Brown Solod

FBC. Other Solods that have an Ah, Ahe, or Ap horizon with a color value of 3.5-4.5 dry, a chroma usually >1.5, and faint to distinct mottles within 50 cm of the mineral soil surface… Gleyed Dark Brown Solod

FBD. Other Solods that have an Ah, Ahe, or Ap horizon with a color value of 3.5-4.5 dry and a chroma usually >1.5… Dark Brown Solod

FBE. Other Solods that have an Ah, Ahe, or Ap horizon with a color value <3.5 dry, a chroma usually >1.5, and faint to distinct mottles within 50 cm of the mineral soil surface… Gleyed Black Solod

FBF. Other Solods that have an Ah, Ahe, or Ap horizon with a color value <3.5 dry and a chroma usually >1.5… Black Solod

FBG. Other Solods that have an Ah, Ahe, or Ap horizon with a color value of 3.5-4.5 dry, a chroma usually <2, and faint to distinct mottles within 50 cm of the mineral soil surface and are associated with a subhumid climate… Gleyed Dark Gray Solod

FBH. Other Solods that have an Ah, Ahe, or Ap horizon with a color value of 3.5-4.5 dry and a chroma usually <2 and are associated with a subhumid climate… Dark Gray Solod

FBI. Other Solods that have an Ah, Ahe, or Ap horizon with a color value >4.5 dry, a chroma usually <2, and faint to distinct mottles within 50 cm of the mineral soil surface and are associated with a subhumid climate… Gleyed Gray Solod

FBJ. Other Solods that have an Ah, Ahe, or Ap horizon with a color value >4.5 dry and a chroma usually <2 and are associated with a subhumid climate… Gray Solod

FC. Solodized Solonetz

FCA. Solodized Solonetzs that have an Ah, Ahe, or Ap horizon with a color value >4.5 dry, a chroma usually >1.5, and faint to distinct mottles within 50 cm of the mineral soil surface… Gleyed Brown Solodized Solonetz

FCB. Other Solodized Solonetzs that have an Ah, Ahe, or Ap horizon with a color value >4.5 dry and a chroma usually >1.5… Brown Solodized Solonetz

FCC. Other Solodized Solonetzs that have an Ah, Ahe, or Ap horizon with a color value of 3.5-4.5 dry, a chroma usually >1.5, and faint to distinct mottles within 50 cm of the mineral soil surface… Gleyed Dark Brown Solodized Solonetz

FCD. Other Solodized Solonetzs that have an Ah, Ahe, or Ap horizon with a color value of 3.5-4.5 dry and a chroma usually >1.5… Dark Brown Solodized Solonetz

FCE. Other Solodized Solonetzs that have an Ah, Ahe, or Ap horizon with a color value <3.5 dry, a chroma usually >1.5, and faint to distinct mottles within 50 cm of the mineral soil surface… Gleyed Black Solodized Solonetz

FCF. Other Solodized Solonetzs that have an Ah, Ahe, or Ap horizon with a color value <3.5 dry and a chroma usually >1.5… Black Solodized Solonetz

FCG. Other Solodized Solonetzs that have an Ah, Ahe, or Ap horizon with a color value of 3.5-4.5 dry, a chroma usually <2, and faint to distinct mottles within 50 cm of the mineral soil surface and are associated with a subhumid climate… Gleyed Dark Gray Solodized Solonetz

FCH. Other Solodized Solonetzs that have an Ah, Ahe, or Ap horizon with a color value of 3.5-4.5 dry and a chroma usually <2 and are associated with a subhumid climate… Dark Gray Solodized Solonetz

FCI. Other Solodized Solonetzs that have an Ah, Ahe, or Ap horizon with a color value >4.5 dry, a chroma usually <2, and faint to distinct mottles within 50 cm of the mineral soil surface and are associated with a subhumid climate… Gleyed Gray Solodized Solonetz

FCJ. Other Solodized Solonetzs that have an Ah, Ahe, or Ap horizon with a color value >4.5 dry and a chroma usually <2 and are associated with a subhumid climate… Gray Solodized Solonetz

FD. Solonetz

FDA. Solonetzs that have a strongly alkaline A horizon with pH (H2O) >8.5… Alkaline Solonetz

FDB. Other Solonetzs that have an Ah, Ahe, or Ap horizon with a color value >4.5 dry, a chroma usually >1.5, and faint to distinct mottles within 50 cm of the mineral soil surface… Gleyed Brown Solonetz

FDC. Other Solonetzs that have an Ah, Ahe, or Ap horizon with a color value >4.5 dry and a chroma usually >1.5… Brown Solonetz

FDD. Other Solonetzs that have an Ah, Ahe, or Ap horizon with a color value of 3.5-4.5 dry, a chroma usually >1.5, and faint to distinct mottles within 50 cm of the mineral soil surface… Gleyed Dark Brown Solonetz

FDE. Other Solonetzs that have an Ah, Ahe, or Ap horizon with a color value of 3.5-4.5 dry and a chroma usually >1.5… Dark Brown Solonetz

FDF. Other Solonetzs that have an Ah, Ahe, or Ap horizon with a color value <3.5 dry, a chroma usually >1.5, and faint to distinct mottles within 50 cm of the mineral soil surface… Gleyed Black Solonetz

FDG. Other Solonetzs that have an Ah, Ahe, or Ap horizon with a color value <3.5 dry and a chroma usually >1.5… Black Solonetz