Ключи к почвенной таксономии 2014

also aquic conditions for some time in normal years (or artificial drainage).

Aquic Kandiustox

ECDH.  Other Kandiustox that have both:

1.  16 kg/m2 or more organic carbon between the mineral soil surface and a depth of 100 cm; and

2.  In all horizons at a depth between 25 and 125 cm from the mineral soil surface, more than 50 percent colors that have both of the following:

ECDI.  Other Kandiustox that have both:

1.  16 kg/m2 or more organic carbon between the mineral soil surface and a depth of 100 cm; and

2.  50 percent or more hue of 7.5YR or yellower and a color value, moist, of 6 or more at a depth between 25 and 125 cm from the mineral soil surface.

between 25 and 125 cm from the mineral soil surface, more than 50 percent colors that have both of the following:

1.  Hue of 2.5YR or redder; and

2.  A value, moist, of 3 or less.

Rhodic Kandiustox

ECDL.  Other Kandiustox that have 50 percent or more hue of 7.5YR or yellower and a color value, moist, of 6 or more at a depth between 25 and 125 cm from the mineral soil surface.

Xanthic Kandiustox

ECDM.  Other Kandiustox.

Typic Kandiustox

Sombriustox

Key to Subgroups

organic carbon between the mineral soil surface and a depth of 100 cm.

Humic Sombriustox

ECAD.  Other Sombriustox.

Typic Sombriustox

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Key to Suborders

CA.  Spodosols that have aquic conditions for some time in normal years (or artificial drainage) in one or more horizons within 50 cm of the mineral soil surface and have one or both of the following:

1.  A histic epipedon; or

2.  Within 50 cm of the mineral soil surface, redoximorphic features in an albic or a spodic horizon.

carbon in a layer 10 cm or more thick within the spodic horizon.

Humods, p. 277

CE.  Other Spodosols.

Orthods, p. 278

Aquods

Key to Great Groups

of the mineral soil surface in 50 percent or more of each pedon.

Placaquods, p. 275

Alaquods

Key to Subgroups

CABA.  Alaquods that have a lithic contact within 50 cm of the mineral soil surface.

Lithic Alaquods

CABB.  OtherAlaquods that have, in 90 percent or more of each pedon, a cemented horizon within 100 cm of the mineral soil surface.

Duric Alaquods

CABC.  OtherAlaquods that have a histic epipedon.

Histic Alaquods

CABD.  OtherAlaquods that:

1.  Within 200 cm of the mineral soil surface, have an argillic or kandic horizon that has a base saturation (by sum of cations) of 35 percent or more in some part; and

2.  Have a texture class (fine-earth fraction) of coarse sand, sand, fine sand, loamy coarse sand, loamy sand, or loamy fine sand throughout a layer extending from the mineral soil surface to the top of a spodic horizon at a depth of 75 to 125 cm.

Alfic ArenicAlaquods

CABE.  OtherAlaquods that:

1.  Have an argillic or kandic horizon within 200 cm of the mineral soil surface; and

2.  Have a texture class (fine-earth fraction) of coarse sand, sand, fine sand, loamy coarse sand, loamy sand, or loamy fine sand throughout a layer extending from the mineral soil

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surface to the top of a spodic horizon at a depth of 75 to 125 cm.

Arenic Ultic Alaquods

CABF.  OtherAlaquods that:

1.  Have an umbric epipedon; and

2.  Have a texture class (fine-earth fraction) of coarse sand, sand, fine sand, loamy coarse sand, loamy sand, or loamy fine sand throughout a layer extending from the mineral soil surface to the top of a spodic horizon at a depth of 75 cm or more.

Arenic Umbric Alaquods

CABG.  OtherAlaquods that have a texture class (fine-earth fraction) of coarse sand, sand, fine sand, loamy coarse sand, loamy sand, or loamy fine sand throughout a layer extending from the mineral soil surface to the top of a spodic horizon at a depth of 75 to 125 cm.

Arenic Alaquods

CABH.  OtherAlaquods that have a texture class (fine-earth fraction) of coarse sand, sand, fine sand, loamy coarse sand, loamy sand, or loamy fine sand throughout a layer extending from the mineral soil surface to the top of a spodic horizon at a depth of 125 cm or more.

Grossarenic Alaquods

CABI.  OtherAlaquods that have, within 200 cm of the mineral soil surface, an argillic or kandic horizon that has a base saturation (by sum of cations) of 35 percent or more in some part.

Cryaquods

Key to Subgroups

CAAA.  Cryaquods that have a lithic contact within 50 cm of the mineral soil surface.

Lithic Cryaquods

CAAB.  Other Cryaquods that have a placic horizon within

100 cm of the mineral soil surface in 50 percent or more of each pedon.

Placic Cryaquods

CAAC.  Other Cryaquods that have, in 90 percent or more of each pedon, a cemented horizon within 100 cm of the mineral soil surface.

Duric Cryaquods

CAAD.  Other Cryaquods that have andic soil properties throughout horizons that have a total thickness of 25 cm or more within 75 cm either of the mineral soil surface or of the top of an organic layer with andic soil properties, whichever is shallower.

Duraquods

Key to Subgroups

throughout horizons that have a total thickness of 25 cm or more within 75 cm either of the mineral soil surface or of the top of an organic layer with andic soil properties, whichever is shallower.

Andic Duraquods

CAEC.  Other Duraquods.

Typic Duraquods

Endoaquods

Key to Subgroups

throughout horizons that have a total thickness of 25 cm or more within 75 cm either of the mineral soil surface or of the top of an organic layer with andic soil properties, whichever is shallower.

Andic Endoaquods

Epiaquods

Key to Subgroups

throughout horizons that have a total thickness of 25 cm or more within 75 cm either of the mineral soil surface or of the top of an organic layer with andic soil properties, whichever is shallower.

Andic Epiaquods

CAFD.  Other Epiaquods that have, within 200 cm of the mineral soil surface, an argillic or kandic horizon that has a base saturation (by sum of cations) of 35 percent or more in some part.

Fragiaquods

Key to Subgroups

between 25 and 50 cm thick that meets all of the requirements for a plaggen epipedon except thickness.

Haploplaggic Fragiaquods

CACC.  Other Fragiaquods that have an argillic or kandic horizon within 200 cm of the mineral soil surface.

Argic Fragiaquods

CACD.  Other Fragiaquods.

Typic Fragiaquods

Placaquods

Key to Subgroups

CADA.  Placaquods that have andic soil properties throughout horizons that have a total thickness of 25 cm or more within 75 cm either of the mineral soil surface or of the top of an organic layer with andic soil properties, whichever is shallower.

Andic Placaquods

CADB.  Other Placaquods.

Typic Placaquods

Cryods

Key to Great Groups

CCA.  Cryods that have a placic horizon within 100 cm of the mineral soil surface in 50 percent or more of each pedon.

Placocryods, p. 277

CCB.  Other Cryods that have, in 90 percent or more of each pedon, a cemented horizon within 100 cm of the mineral soil surface.

Duricryods, p. 275

CCC.  Other Cryods that have 6.0 percent or more organic carbon throughout a layer 10 cm or more thick within the spodic horizon.

Humicryods, p. 276

CCD.  Other Cryods.

Haplocryods, p. 276

Duricryods

Key to Subgroups

CCBA.  Duricryods that have both:

1.  Redoximorphic features in one or more horizons within

75 cm of the mineral soil surface and also aquic conditions for some time in normal years (or artificial drainage); and

2.  Andic soil properties throughout horizons that have a total thickness of 25 cm or more within 75 cm either of the mineral soil surface or of the top of an organic layer with andic soil properties, whichever is shallower.

Aquandic Duricryods

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CCBB.  Other Duricryods that have andic soil properties throughout horizons that have a total thickness of 25 cm or more within 75 cm either of the mineral soil surface or of the top of an organic layer with andic soil properties, whichever is shallower.

Andic Duricryods

CCBC.  Other Duricryods that have redoximorphic features in one or more horizons within 75 cm of the mineral soil surface and also aquic conditions for some time in normal years (or artificial drainage).

Aquic Duricryods

CCBD.  Other Duricryods that are saturated with water in one or more layers within 100 cm of the mineral soil surface in normal years for either or both:

1.  20 or more consecutive days; or

2.  30 or more cumulative days.

Oxyaquic Duricryods

CCBE.  Other Duricryods that have 6.0 percent or more organic carbon throughout a layer 10 cm or more thick within the spodic horizon.

Humic Duricryods

CCBF.  Other Duricryods.

Typic Duricryods

Haplocryods

Key to Subgroups

CCDA.  Haplocryods that have a lithic contact within 50 cm of the mineral soil surface.

Lithic Haplocryods

CCDB.  Other Haplocryods that have both:

1.  Redoximorphic features in one or more horizons within

75 cm of the mineral soil surface and also aquic conditions for some time in normal years (or artificial drainage); and

2.  Andic soil properties throughout horizons that have a total thickness of 25 cm or more within 75 cm either of the mineral soil surface or of the top of an organic layer with andic soil properties, whichever is shallower.

Aquandic Haplocryods

CCDC.  Other Haplocryods that have andic soil properties throughout horizons that have a total thickness of 25 cm or more within 75 cm either of the mineral soil surface or of the top of an organic layer with andic soil properties, whichever is shallower.

Andic Haplocryods

in one or more horizons within 75 cm of the mineral soil surface and also aquic conditions for some time in normal years (or artificial drainage).

Aquic Haplocryods

CCDF.  Other Haplocryods that are saturated with water in one or more layers within 100 cm of the mineral soil surface in normal years for either or both:

1.  20 or more consecutive days; or

2.  30 or more cumulative days.

Oxyaquic Haplocryods

CCDG.  Other Haplocryods that have 1.1 percent or less organic carbon in the upper 10 cm of the spodic horizon.

Entic Haplocryods

CCDH.  Other Haplocryods.

Typic Haplocryods

Humicryods

Key to Subgroups

CCCA.  Humicryods that have a lithic contact within 50 cm of the mineral soil surface.

Lithic Humicryods

CCCB.  Other Humicryods that have both:

1.  Redoximorphic features in one or more horizons within

75 cm of the mineral soil surface and also aquic conditions for some time in normal years (or artificial drainage); and

2.  Andic soil properties throughout horizons that have a total thickness of 25 cm or more within 75 cm either of the mineral soil surface or of the top of an organic layer with andic soil properties, whichever is shallower.

Aquandic Humicryods

CCCC.  Other Humicryods that have andic soil properties throughout horizons that have a total thickness of 25 cm or more within 75 cm either of the mineral soil surface or of the top of an organic layer with andic soil properties, whichever is shallower.

Andic Humicryods

CCCD.  Other Humicryods that have a folistic epipedon.

Folistic Humicryods

CCCE.  Other Humicryods that have redoximorphic features

in one or more horizons within 75 cm of the mineral soil surface and also aquic conditions for some time in normal years (or artificial drainage).

Aquic Humicryods

CCCF.  Other Humicryods that are saturated with water in one or more layers within 100 cm of the mineral soil surface in normal years for either or both:

1.  20 or more consecutive days; or

2.  30 or more cumulative days.

Oxyaquic Humicryods

CCCG.  Other Humicryods.

Typic Humicryods

Placocryods

Key to Subgroups

CCAA.  Placocryods that have andic soil properties throughout horizons that have a total thickness of 25 cm or more within 75 cm either of the mineral soil surface or of the top of an organic layer with andic soil properties, whichever is shallower.

Andic Placocryods

CCAB.  Other Placocryods that have 6.0 percent or more organic carbon in a layer 10 cm or more thick within the spodic horizon.

Humic Placocryods

CCAC.  Other Placocryods.

Typic Placocryods

Gelods

Key to Great Groups

CBA.  Gelods that have 6.0 percent or more organic carbon throughout a layer 10 cm or more thick within the spodic horizon.

Humigelods, p. 277

CBB.  Other Gelods.

Haplogelods, p. 277

Haplogelods

Key to Subgroups

CBBA.  Haplogelods that have a lithic contact within 50 cm of the mineral soil surface.

Lithic Haplogelods

CBBB.  Other Haplogelods that have andic soil properties

throughout horizons that have a total thickness of 25 cm or more within 75 cm either of the mineral soil surface or of the top of an organic layer with andic soil properties, whichever is shallower.

Andic Haplogelods

CBBC.  Other Haplogelods that have redoximorphic features in one or more horizons within 75 cm of the mineral soil surface and also aquic conditions for some time in normal years (or artificial drainage).

Aquic Haplogelods

CBBD.  Other Haplogelods that have gelic materials within

200 cm of the mineral soil surface.

Turbic Haplogelods

CBBE.  Other Haplogelods.

Typic Haplogelods

Humigelods

Key to Subgroups

CBAA.  Humigelods that have a lithic contact within 50 cm of the mineral soil surface.

Lithic Humigelods

CBAB.  Other Humigelods that have andic soil properties throughout horizons that have a total thickness of 25 cm or more within 75 cm either of the mineral soil surface or of the top of an organic layer with andic soil properties, whichever is shallower.

Andic Humigelods

CBAC.  Other Humigelods that have redoximorphic features in one or more horizons within 75 cm of the mineral soil surface and also aquic conditions for some time in normal years (or artificial drainage).

Aquic Humigelods

CBAD.  Other Humigelods that have gelic materials within

200 cm of the mineral soil surface.

Turbic Humigelods

CBAE.  Other Humigelods.

Typic Humigelods

Humods

Key to Great Groups

CDA.  Humods that have a placic horizon within 100 cm of the mineral soil surface in 50 percent or more of each pedon.

Placohumods, p. 278

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CDB.  Other Humods that have, in 90 percent or more of each pedon, a cemented horizon within 100 cm of the mineral soil surface.

Durihumods, p. 278

CDC.  Other Humods that have a fragipan within 100 cm of the mineral soil surface.

Fragihumods, p. 278

CDD.  Other Humods.

Haplohumods, p. 278

Durihumods

Key to Subgroups

CDBA.  Durihumods that have andic soil properties throughout horizons that have a total thickness of 25 cm or more within 75 cm either of the mineral soil surface or of the top of an organic layer with andic soil properties, whichever is shallower.

Andic Durihumods

CDBB.  Other Durihumods.

Typic Durihumods

Fragihumods

Key to Subgroups

CDCA.  All Fragihumods (provisionally).

Typic Fragihumods

Haplohumods

Key to Subgroups

CDDA.  Haplohumods that have a lithic contact within 50 cm of the mineral soil surface.

Lithic Haplohumods

CDDB.  Other Haplohumods that have andic soil properties throughout horizons that have a total thickness of 25 cm or more within 75 cm either of the mineral soil surface or of the top of an organic layer with andic soil properties, whichever is shallower.

Andic Haplohumods

CDDC.  Other Haplohumods that have a surface horizon between 25 and 50 cm thick that meets all of the requirements for a plaggen epipedon except thickness.

Haploplaggic Haplohumods

CDDD.  Other Haplohumods.

Typic Haplohumods

Placohumods

Key to Subgroups

CDAA.  Placohumods that have andic soil properties throughout horizons that have a total thickness of 25 cm or more within 75 cm either of the mineral soil surface or of the top of an organic layer with andic soil properties, whichever is shallower.

Andic Placohumods

CDAB.  Other Placohumods.

Typic Placohumods

Orthods

Key to Great Groups

CEA.  Orthods that have, in 50 percent or more of each pedon, a placic horizon within 100 cm of the mineral soil surface.

Placorthods, p. 281

CEB.  Other Orthods that have, in 90 percent or more of each pedon, a cemented horizon within 100 cm of the mineral soil surface.

Durorthods, p. 279

CEC.  Other Orthods that have a fragipan within 100 cm of the mineral soil surface.

Fragiorthods, p. 279

CED.  Other Orthods that have less than 0.10 percent iron (by ammonium oxalate) in 75 percent or more of the spodic horizon.

Alorthods, p. 278

CEE.  Other Orthods.

Haplorthods, p. 280

Alorthods

Key to Subgroups

CEDA.  Alorthods that are saturated with water in one or more layers within 100 cm of the mineral soil surface in normal years for either or both:

1.  20 or more consecutive days; or

2.  30 or more cumulative days.

Oxyaquic Alorthods

CEDB.  OtherAlorthods that:

1.  Have a texture class (fine-earth fraction) of coarse sand, sand, fine sand, loamy coarse sand, loamy sand, or loamy fine sand throughout a layer extending from the mineral soil

surface to the top of a spodic horizon at a depth of 75 to 125 cm; and

2.  Have an argillic or kandic horizon below the spodic horizon.

Arenic Ultic Alorthods

CEDC.  OtherAlorthods that have a texture class (fine-earth fraction) of coarse sand, sand, fine sand, loamy coarse sand, loamy sand, or loamy fine sand throughout a layer extending from the mineral soil surface to the top of a spodic horizon at a depth of 75 to 125 cm.

Arenic Alorthods

CEDD.  OtherAlorthods that:

1.  Have a texture class (fine-earth fraction) of coarse sand, sand, fine sand, loamy coarse sand, loamy sand, or loamy fine sand throughout a layer extending from the mineral soil surface to the top of a spodic horizon at a depth of 125 cm or more; and

2.  Have, in 10 percent or more of each pedon, less than 3.0 percent organic carbon in the upper 2 cm of the spodic horizon.

Entic Grossarenic Alorthods

CEDE.  OtherAlorthods that have, in 10 percent or more of each pedon, less than 3.0 percent organic carbon in the upper 2 cm of the spodic horizon.

Entic Alorthods

CEDF.  OtherAlorthods that have a texture class (fine-earth fraction) of coarse sand, sand, fine sand, loamy coarse sand, loamy sand, or loamy fine sand throughout a layer extending from the mineral soil surface to the top of a spodic horizon at a depth of 125 cm or more.

mineral soil surface, an argillic or kandic horizon that has a base saturation (by sum of cations) of 35 percent or more in some part.

Durorthods

Key to Subgroups

CEBA.  Durorthods that have andic soil properties throughout horizons that have a total thickness of 25 cm or more within 75 cm either of the mineral soil surface or of the top of an organic layer with andic soil properties, whichever is shallower.

Andic Durorthods

CEBB.  Other Durorthods.

Typic Durorthods

Fragiorthods

Key to Subgroups

CECA.  Fragiorthods that have redoximorphic features in one or more horizons within 75 cm of the mineral soil surface and also aquic conditions for some time in normal years (or artificial drainage).

Aquic Fragiorthods

CECB.  Other Fragiorthods that:

1.  Are saturated with water in one or more layers within 100 cm of the mineral soil surface in normal years for either or both:

2.  Have, within 200 cm of the mineral soil surface, an argillic or kandic horizon that has a base saturation (by sum of cations) of 35 percent or more in some part.

Alfic Oxyaquic Fragiorthods

CECC.  Other Fragiorthods that are saturated with water in one or more layers within 100 cm of the mineral soil surface in normal years for either or both:

1.  20 or more consecutive days; or

2.  30 or more cumulative days.

Oxyaquic Fragiorthods

CECD.  Other Fragiorthods that have a surface horizon between 25 and 50 cm thick that meets all of the requirements for a plaggen epipedon except thickness.

Haploplaggic Fragiorthods

CECE.  Other Fragiorthods that have, within 200 cm of the mineral soil surface, an argillic or kandic horizon that has a base saturation (by sum of cations) of 35 percent or more in some part.

Alfic Fragiorthods

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one of the following:

1.  Atexture class of very fine sand, loamy very fine sand, or finer and all of the following:

value or chroma of 4 or more (crushed and smoothed sample); or

2.  Atexture class of loamy fine sand, fine sand, or coarser and either or both a moist color value or chroma of 4 or more (crushed and smoothed sample) in the upper 2.5 cm.

Entic Fragiorthods

CECH.  Other Fragiorthods.

Typic Fragiorthods

Haplorthods

Key to Subgroups

CEEA.  Haplorthods that have a lithic contact within 50 cm of the mineral soil surface and either:

1.  Aspodic horizon with a texture class of very fine sand, loamy very fine sand, or finer and all of the following:

value or chroma of 4 or more (crushed and smoothed sample); or

2.  Aspodic horizon with a texture class of loamy fine sand, fine sand, or coarser and either or both a moist color value or chroma of 4 or more (crushed and smoothed sample) in the upper 2.5 cm.

Entic Lithic Haplorthods

CEEB.  Other Haplorthods that have a lithic contact within 50 cm of the mineral soil surface.

Lithic Haplorthods

CEEC.  Other Haplorthods that have both: 1.  Fragic soil properties:

a.  In 30 percent or more of the volume of a layer 15 cm

or more thick that has its upper boundary within 100 cm of the mineral soil surface; or

b.  In 60 percent or more of the volume of a layer 15 cm or more thick; and

2.  Redoximorphic features in one or more horizons within

75 cm of the mineral soil surface and also aquic conditions for some time in normal years (or artificial drainage).

Fragiaquic Haplorthods

CEED.  Other Haplorthods that have both:

1.  Redoximorphic features in one or more horizons within

75 cm of the mineral soil surface and also aquic conditions for some time in normal years (or artificial drainage); and

2.  Within 200 cm of the mineral soil surface, an argillic or kandic horizon that has a base saturation (by sum of cations) of 35 percent or more in some part.

Aqualfic Haplorthods

CEEE.  Other Haplorthods that have redoximorphic features in one or more horizons within 75 cm of the mineral soil surface and also aquic conditions for some time in normal years (or artificial drainage) and either:

1.  Aspodic horizon with a texture class of very fine sand, loamy very fine sand, or finer and all of the following:

value or chroma of 4 or more (crushed and smoothed sample); or

2.  Aspodic horizon with a texture class of loamy fine sand, fine sand, or coarser and either or both a moist color value or chroma of 4 or more (crushed and smoothed sample) in the upper 2.5 cm.

Aquentic Haplorthods

CEEF.  Other Haplorthods that have redoximorphic features in one or more horizons within 75 cm of the mineral soil surface and also aquic conditions for some time in normal years (or artificial drainage).

Aquic Haplorthods

CEEG.  Other Haplorthods that have:

1.  Within 200 cm of the mineral soil surface, an argillic or kandic horizon that has a base saturation (by sum of cations) of 35 percent or more in some part; and

2.  Saturation with water in one or more layers within 100 cm of the mineral soil surface in normal years for either or both: