Daily Archives: กุมภาพันธ์ 6th, 2012

BCDA.Lithic Haplosaprists

BCDA.Lithic Haplosaprists

Key to Subgroups 

BCDA. Haplosaprists that have a lithic contact within the control section. Lithic Haplosaprists 

Description of Subgroups 

BCDALithic Haplosaprists.—These soils differ from Typic Haplosaprists because they have a lithic contact within the control section. These soils are of very small extent in the United States.


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BCDB.Limnic Haplosaprists

BCDB.Limnic Haplosaprists

Key to Subgroups 

BCDB. Other Haplosaprists that have one or more limnic layers with a total thickness of 5 cm or more within the control section. Limnic Haplosaprists 

Description of Subgroups 

BCDBLimnic Haplosaprists.—These soils differ from Typic Haplosaprists because they have one or more limnic layers with a total thickness of 5 cm or more within the control section. These soils are of small extent, mostly in the Lake States in the United States.

Soil Families and Soil Series in Subgroup

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BCDC.Halic Terric Haplosaprists

BCDC.Halic Terric Haplosaprists

Key to Subgroups 

BCDC. Other Haplosaprists that have both:

1. Throughout a layer 30 cm or thick that has its upper boundary within the control section, an electrical conductivity of 30 dS/m or more (1:1soil:water) for 6 months or more during normal years; and

2. A mineral layer 30 cm or more thick that has its upper boundary within the control section, below the surface tier. Halic Terric Haplosaprists 

Description of Subgroups 

BCDCHalic Terric Haplosaprists.—These are the Haplosaprists that have an electrical conductivity of 30 dS/m or more in a layer 30 cm or more thick within 130 cm of the soil surface and have a mineral layer 30 cm or more thick. These soils do not have a lithic contact within a depth of 130 cm or limnic layers. Halic Terric Haplosaprists commonly occur near coastal areas that are inundated by the ocean.

Soil Families and Soil Series in Subgroup

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BCDD.Halic Haplosaprists

BCDD.Halic Haplosaprists

Key to Subgroups 

BCDD. Other Haplosaprists that have throughout a layer 30 cm or more thick within the control section, an electrical conductivity of 30 dS/m or more (1:1 soil:water) for 6 months or more during normal years. Halic Haplosaprists 

Description of Subgroups 

BCDDHalic Haplosaprists.—These are the Haplosaprists that have an electrical conductivity of 30 dS/m or more in a layer 30 cm or more thick within 130 cm of the soil surface. These soils do not have a lithic contact within a depth of 130 cm or limnic layers. Halic Haplosaprists commonly occur near coastal areas that are inundated by the ocean.

Soil Families and Soil Series in Subgroup

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BCDE.Terric Haplosaprists

BCDE.Terric Haplosaprists

Key to Subgroups 

BCDE. Other Haplosaprists that have a mineral layer 30 cm or more thick that has its upper boundary within the control section, below the surface tier. Terric Haplosaprists 

Description of Subgroups 

BCDETerric Haplosaprists.—These soils differ from Typic Haplosaprists because they have a mineral layer 30 cm or more thick that has its upper boundary within the control section, below the surface tier. These soils are widely distributed in the United States, mostly in the Eastern States. They are used mainly as woodland, cropland, or wildlife habitat.

Soil Families and Soil Series in Subgroup

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BCDF.Fluvaquentic Haplosaprists

BCDF.Fluvaquentic Haplosaprists

Key to Subgroups 

BCDF. Other Haplosaprists that have, within the organic materials, either one mineral layer 5 cm or more thick or two or more mineral layers of any thickness in the control section, below the surface tier. Fluvaquentic Haplosaprists 

Description of Subgroups 

BCDFFluvaquentic Haplosaprists.—These soils differ from Typic Haplosaprists because they have, within the organic materials, either one mineral layer 5 to 30 cm thick or two or more mineral layers of any thickness in the control section, below the surface tier. These soils are of very small extent in the United States.

Soil Families and Soil Series in Subgroup

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BCDG.Hemic Haplosaprists

BCDG.Hemic Haplosaprists

Key to Subgroups 

BCDG. Other Haplosaprists that have one or more layers of fibric or hemic materials with a total thickness of 25 cm or more in the control section, below the surface tier. Hemic Haplosaprists 

Description of Subgroups 

BCDGHemic Haplosaprists.—These soils differ from Typic Haplosaprists because they have one or more layers of fibric or hemic materials with a total thickness of 25 cm or more below the surface tier. These soils are of small extent, mostly in the Lake States in the United States.

Soil Families and Soil Series in Subgroup

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BCDH.Typic Haplosaprists

BCDH.Typic Haplosaprists

Key to Subgroups 

BCDH. Other Haplosaprists. Typic Haplosaprists 

Description of Subgroups 

BCDHTypic Haplosaprists.—The central concept or Typic subgroup of Haplosaprists is fixed on soils that do not have a lithic contact and do not have thick or thin mineral layers or intermittent mineral layers below the surface tier. A lithic contact is used in classifying the Lithic subgroup, as it is throughout this taxonomy. In addition, thick or thin mineral layers as well as intermittent mineral layers that are below the surface tier cause soils to be excluded from the Typic subgroup. The presence of layers of materials less decomposed than sapric materials is used as differentia for the Hemic subgroup. These soils are widely distributed in the United States, mostly in the Eastern States. They are used mainly as woodland, cropland, or wildlife habitat.

Soil Families and Soil Series in Subgroup

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BDAA.Typic Sulfohemists

BDAA.Typic Sulfohemists

Key to Subgroups 

BDAA. All Sulfohemists (provisionally). Typic Sulfohemists


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BDBA.Terric Sulfihemists

BDBA.Terric Sulfihemists

Key to Subgroups 

BDBA. Sulfihemists that have a mineral layer 30 cm or more thick that has its upper boundary within the control section, below the surface tier.Terric Sulfihemists 

Description of Subgroups 

BDBATerric Sulfihemists.—These soils differ from Typic Sulfihemists because they have a mineral layer 30 cm or more thick that has its upper boundary within the control section, below the surface tier. They are mainly in coastal marshes near the mouths of rivers or in the deltas of rivers on the east coast of the United States. They are locally extensive. These soils support native vegetation, mostly forbs and grasslike plants. They are used mainly as recreational areas or wildlife habitat.


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