Natural Resources
Conservation Service
Major Land Resource Area 136X
Major Land Resource Area
Accessed: 08/18/2026
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ProvisionalF136XY140VA/F136XY140VAMesic Temperature Regime, Low Terraces and Drains, Occasional Inundation -
ProvisionalF136XY150VA/F136XY150VAMesic Temperature Regime, Low Terraces and Drains, Rare Inundation
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ProvisionalF136XY230VA/F136XY230VAMesic Temperature Regime, Basic Upland Forest, Depth Restriction, Dry
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ProvisionalF136XY300VA/F136XY300VAMesic Temperature Regime, Acidic Upland Depressions and Heads of Drains, Wet
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ProvisionalF136XY330VA/F136XY330VAMesic Temperature Regime, Acidic Upland Forest, Depth Restriction, Dry-moist
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ProvisionalF136XY370VA/F136XY370VAMesic Temperature Regime, Acidic Upland Woodland, Depth Restriction, Dry
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ProvisionalF136XY400NC/F136XY400NCTriassic Basin Upland Woodland, Expansive Clay, Seasonally Wet and Dry
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ProvisionalF136XY700NC/F136XY700NCBasic Upland Flats and Depressions, Expansive Clay, Seasonally Wet and Dry
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ProvisionalF136XY815NC/F136XY815NCAcidic Upland Woodland, Depth Restriction, Seasonally Wet and Dry
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The soil temperature regime is mesic, residing outside the native range of loblolly pine
The soil temperature regime is thermic, residing inside the native range of loblolly pine
Parent materials are alluvium: FLOOD PLAINS AND BOTTOMLANDS
Parent materials are residuum, colluvium, or highly weathered, old alluvium: PIEDMONT UPLANDS
Active flood plains (site is subject to regular overbank flooding)
Above active flood plain (site is NOT subject to regular overbank flooding). Soils are better-developed.
The seasonal high water table is within 12 inches of the surface (backswamps, depressions, sloughs, and other wet areas on flood plains): FLOOD PLAINS, VERY WET
The depth to the seasonal high water table is ≥ 12 inches of the surface
[Criteria]
F136XY100VA – Mesic Temperature Regime, Flood Plain Forest, Very Wet
F136XY100VA – Mesic Temperature Regime, Flood Plain Forest, Very Wet
Nearly level flood plains
Sandy natural levees (> 70% sand throughout) adjacent to larger rivers and streams
The seasonal high water table is within 12 to 24 inches of surface (depth to low chroma colors > 12 inches and ≤ 24 inches): FLOOD PLAINS, WET
The depth to the seasonal high water table is ≥ 24 inches of the surface: FLOOD PLAIN, MOIST
[Criteria]
F136XY110VA – Mesic Temperature Regime, Flood Plain Forest, Wet
F136XY110VA – Mesic Temperature Regime, Flood Plain Forest, Wet
[Criteria]
F136XY120VA – Mesic Temperature Regime, Flood Plain Forest, Moist
F136XY120VA – Mesic Temperature Regime, Flood Plain Forest, Moist
[Criteria]
F136XY130NC – Mesic Temperature Regime, Flood Plain Levee Forest, Sandy
F136XY130NC – Mesic Temperature Regime, Flood Plain Levee Forest, Sandy
The seasonal high water table is within 12 inches of the surface (depth to low chroma colors ≤ 12 inches): LOW STREAM TERRACES AND DRAINAGEWAYS, VERY WET
The depth to the seasonal high water table is ≥ 12 inches of the surface
[Criteria]
F136XY140VA – Mesic Temperature Regime, Low Terraces and Drains, Occasional Inundation
F136XY140VA – Mesic Temperature Regime, Low Terraces and Drains, Occasional Inundation
Subsoil is red and highly weathered AND flooding frequency is none
Subsoil is NOT red and highly weathered, flooding frequency is rare or occasional
Proceed to I.B.: PIEDMONT UPLANDS
The seasonal high water table is within 12 to 18 inches of surface (depth to low chroma colors > 12 inches and ≤ 18 inches): LOW STREAM TERRACES AND DRAINAGEWAYS, WET
The depth to the seasonal high water table is ≥ 18 inches of the surface: HIGH STREAM TERRACES, MOIST
[Criteria]
F136XY150VA – Mesic Temperature Regime, Low Terraces and Drains, Rare Inundation
F136XY150VA – Mesic Temperature Regime, Low Terraces and Drains, Rare Inundation
[Criteria]
F136XY160VA – Mesic Temperature Regime, High Terraces, Very Rare Inundation
F136XY160VA – Mesic Temperature Regime, High Terraces, Very Rare Inundation
Parent materials are NOT Triassic sedimentary rock
Parent materials are Triassic sedimentary rock: TRIASSIC BASIN UPLANDS
Parent materials are mafic intrusive rock AND base saturation ≥ 35% in the subsoil: BASIC UPLANDS
Parent materials are NOT mafic intrusive rock OR base saturation < 35%: ACIDIC UPLANDS
The seasonal high water table is within 12 inches of the surface (depth to low chroma colors ≤ 12): BASIC UPLANDS, SEASONALLY VERY WET
The depth to the seasonal high water table is ≥ 12 inches of the surface
Upland flats, upland depressions, heads of drains
[Criteria]
F136XY200VA – Mesic Temperature Regime, Basic Upland Flats and Depressions, Expansive Clay, Seasonally Wet and Dry
F136XY200VA – Mesic Temperature Regime, Basic Upland Flats and Depressions, Expansive Clay, Seasonally Wet and Dry
The seasonal high water table is within 12 to 40 inches of the surface (depth to low chroma colors is > 12 inches and ≤ 40 inches): BASIC UPLANDS, SEASONALLY WET
The depth to the seasonal high water table is ≥ 40 inches of the surface
[Criteria]
F136XY210VA – Mesic Temperature Regime, Basic Upland Woodland, Expansive Clay, Seasonally Wet and Dry
F136XY210VA – Mesic Temperature Regime, Basic Upland Woodland, Expansive Clay, Seasonally Wet and Dry
Depth to bedrock is ≥ 40 inches OR the available water storage capacity of the profile is ≥ 6 inches: BASIC UPLANDS, MOIST
Depth to bedrock is < 40 inches AND the available water storage capacity of the profile is < 6 inches: BASIC UPLANDS, DRY
[Criteria]
F136XY220VA – Mesic Temperature Regime, Basic Upland Forest, Moist
F136XY220VA – Mesic Temperature Regime, Basic Upland Forest, Moist
[Criteria]
F136XY230VA – Mesic Temperature Regime, Basic Upland Forest, Depth Restriction, Dry
F136XY230VA – Mesic Temperature Regime, Basic Upland Forest, Depth Restriction, Dry
The seasonal high water table is within 12 inches of the surface (depth to low chroma colors ≤ 12 inches): ACIDIC UPLANDS, SEASONALLY VERY WET
The depth to the seasonal high water table is ≥ 12 inches of the surface
Upland depressions, heads of drains, upland flats
[Criteria]
F136XY300VA – Mesic Temperature Regime, Acidic Upland Depressions and Heads of Drains, Wet
F136XY300VA – Mesic Temperature Regime, Acidic Upland Depressions and Heads of Drains, Wet
The seasonal high water table is within 12 to 40 inches of the surface (depth to low chroma colors is > 12 and < 40 inches): ACIDIC UPLANDS, SEASONALLY WET
The depth to the seasonal high water table is ≥ 40 inches of the surface
[Criteria]
F136XY310VA – Mesic Temperature Regime, Acidic Upland Forest, Seasonally Wet
F136XY310VA – Mesic Temperature Regime, Acidic Upland Forest, Seasonally Wet
Depth to bedrock is ≥ 40 inches OR the available water storage capacity of the profile is ≥ 4 inches
Depth to bedrock is < 40 inches AND the available water storage capacity of the profile is < 4 inches: ACIDIC UPLANDS, DRY
Rolling Piedmont plateau
Landscape is highly dissected
Depth to bedrock is ≥ 40 inches AND the available water storage capacity of the profile is ≥ 6 inches: ACIDIC UPLANDS, MOIST
Depth to bedrock is < 40 inches AND the available water storage capacity of the profile is < 6 inches: ACIDIC UPLANDS, DRY-MOIST
[Criteria]
F136XY320VA – Mesic Temperature Regime, Acidic Upland Forest, Moist
F136XY320VA – Mesic Temperature Regime, Acidic Upland Forest, Moist
[Criteria]
F136XY330VA – Mesic Temperature Regime, Acidic Upland Forest, Depth Restriction, Dry-moist
F136XY330VA – Mesic Temperature Regime, Acidic Upland Forest, Depth Restriction, Dry-moist
Lower landscape positions (footslopes and toeslopes) AND parent materials are colluvium, or a mixture of colluvium and slope alluvium
[Criteria]
F136XY340VA – Mesic Temperature Regime, Acidic Upland Colluvial Forest
F136XY340VA – Mesic Temperature Regime, Acidic Upland Colluvial Forest
Rolling Piedmont Plateau
Landscape is highly dissected (e.g., high hills, prominent ridges, monadnocks, etc.)
[Criteria]
F136XY370VA – Mesic Temperature Regime, Acidic Upland Woodland, Depth Restriction, Dry
F136XY370VA – Mesic Temperature Regime, Acidic Upland Woodland, Depth Restriction, Dry
[Criteria]
F136XY380VA – Mesic Temperature Regime, Acidic High Hills and Isolated Ridges, Depth Restriction, Dry
F136XY380VA – Mesic Temperature Regime, Acidic High Hills and Isolated Ridges, Depth Restriction, Dry
The seasonal high water table is within 12 inches of the surface: TRIASSIC BASIN UPLANDS, SEASONALLY VERY WET
The depth to the seasonal high water table is ≥ 12 inches of the surface
Parent materials are strongly basic sedimentary rock (Triassic shale, siltstone, mudstone, etc.) and react with dilute hydrochloric acid
[Criteria]
F136XY200VA – Mesic Temperature Regime, Basic Upland Flats and Depressions, Expansive Clay, Seasonally Wet and Dry
F136XY200VA – Mesic Temperature Regime, Basic Upland Flats and Depressions, Expansive Clay, Seasonally Wet and Dry
The seasonal high water table is within 12 to 40 inches of the surface (depth to low chroma colors is between 12 to 40 inches): TRIASSIC BASIN UPLANDS, SEASONALLY WET
The depth to the seasonal high water table is ≥ 40 inches of the surface
Shrink-swell potential is very high (subsoil is sticky when wet, becoming hard when dry)
Shrink-swell potential is NOT very high
[Criteria]
F136XY400NC – Triassic Basin Upland Woodland, Expansive Clay, Seasonally Wet and Dry
F136XY400NC – Triassic Basin Upland Woodland, Expansive Clay, Seasonally Wet and Dry
[Criteria]
F136XY410NC – Triassic Basin Upland Forest, Seasonally Wet
F136XY410NC – Triassic Basin Upland Forest, Seasonally Wet
Depth to bedrock is ≥ 40 inches OR the available water storage capacity of the profile is ≥ 4 inches: TRIASSIC BASIN UPLANDS, MOIST TO DRY-MOIST
Depth to bedrock is < 40 inches AND the available water storage capacity of the profile is < 4 inches: TRIASSIC BASIN UPLANDS, DRY
[Criteria]
F136XY420NC – Triassic Basin Upland Forest, Moist
F136XY420NC – Triassic Basin Upland Forest, Moist
[Criteria]
F136XY430NC – Triassic Basin Upland Forest, Dry
F136XY430NC – Triassic Basin Upland Forest, Dry
Parent materials are Triassic sedimentary rock: TRIASSIC BASIN UPLANDS
Parent materials are NOT Triassic sedimentary rock
The seasonal high water table is within 12 to 40 inches of the surface (depth to low chroma colors is between 12 to 40 inches): TRIASSIC BASIN UPLANDS, SEASONALLY WET
The depth to the seasonal high water table is ≥ 40 inches of the surface
Shrink-swell potential is very high (subsoil is sticky when wet, becoming hard when dry)
Shrink-swell potential is NOT very high
[Criteria]
F136XY400NC – Triassic Basin Upland Woodland, Expansive Clay, Seasonally Wet and Dry
F136XY400NC – Triassic Basin Upland Woodland, Expansive Clay, Seasonally Wet and Dry
[Criteria]
F136XY410NC – Triassic Basin Upland Forest, Seasonally Wet
F136XY410NC – Triassic Basin Upland Forest, Seasonally Wet
Depth to bedrock is ≥ 40 inches OR the available water storage capacity of the profile is ≥ 4 inches: TRIASSIC BASIN UPLANDS, MOIST TO DRY-MOIST
Depth to bedrock is < 40 inches AND the available water storage capacity of the profile is < 4 inches: TRIASSIC BASIN UPLANDS, DRY
[Criteria]
F136XY420NC – Triassic Basin Upland Forest, Moist
F136XY420NC – Triassic Basin Upland Forest, Moist
[Criteria]
F136XY430NC – Triassic Basin Upland Forest, Dry
F136XY430NC – Triassic Basin Upland Forest, Dry
Parent materials are alluvium: FLOOD PLAINS AND BOTTOMLANDS
Parent materials are residuum, colluvium, or highly weathered, old alluvium: PIEDMONT UPLANDS
Active flood plains (site is subject to regular overbank flooding)
Above active flood plain (site is NOT subject to regular overbank flooding). Soils are better-developed.
The seasonal high water table is within 12 inches of the surface (backswamps, depressions, sloughs, and other wet areas on flood plains): FLOOD PLAINS, VERY WET
The depth to the seasonal high water table is ≥ 12 inches of the surface
[Criteria]
F136XY600NC – Flood Plain Forest, Very Wet
F136XY600NC – Flood Plain Forest, Very Wet
Nearly level flood plains
Sandy natural levees (> 70% sand throughout) adjacent to larger rivers and streams
The seasonal high water table is within 12 to 24 inches of surface (depth to low chroma colors > 12 inches and ≤ 24 inches): FLOOD PLAINS, WET
The depth to the seasonal high water table is ≥ 24 inches of the surface: FLOOD PLAINS, MOIST
[Criteria]
F136XY610GA – Flood Plain Forest, Wet
F136XY610GA – Flood Plain Forest, Wet
[Criteria]
F136XY620GA – Flood Plain Forest, Moist
F136XY620GA – Flood Plain Forest, Moist
[Criteria]
F136XY630GA – Flood Plain Levee Forest, Sandy
F136XY630GA – Flood Plain Levee Forest, Sandy
The seasonal high water table is within 12 inches of the surface (depth to low chroma colors ≤ 12 inches): LOW STREAM TERRACES AND DRAINAGEWAYS, VERY WET
The depth to the seasonal high water table is ≥ 12 inches of the surface
[Criteria]
F136XY640VA – Low Terraces and Drains, Occasional Inundation
F136XY640VA – Low Terraces and Drains, Occasional Inundation
Subsoil is red and highly weathered AND flooding frequency is none
Subsoil is NOT red and highly weathered, flooding frequency is rare or occasional
Proceed to II.B.2.: PIEDMONT UPLANDS
The seasonal high water table is within 12 to 18 inches of surface (depth to low chroma colors > 12 inches and ≤ 18 inches): LOW STREAM TERRACES AND DRAINAGEWAYS, WET
The depth to the seasonal high water table is ≥ 18 inches of the surface: HIGH STREAM TERRACES, MOIST
[Criteria]
F136XY650NC – Low Terraces and Drains, Rare Inundation
F136XY650NC – Low Terraces and Drains, Rare Inundation
[Criteria]
F136XY660NC – High Terraces, Very Rare Inundation
F136XY660NC – High Terraces, Very Rare Inundation
Parent materials are mafic intrusive rock AND base saturation ≥ 35% in the subsoil: BASIC UPLANDS
Parent materials are NOT mafic intrusive rock OR base saturation < 35%: ACIDIC UPLANDS
The seasonal high water table is within 12 inches of the surface (depth to low chroma colors ≤ 12 inches): BASIC UPLANDS, SEASONALLY VERY WET
The depth to the seasonal high water table is ≥ 12 inches of the surface
Upland flats, upland depressions, heads of drains
[Criteria]
F136XY700NC – Basic Upland Flats and Depressions, Expansive Clay, Seasonally Wet and Dry
F136XY700NC – Basic Upland Flats and Depressions, Expansive Clay, Seasonally Wet and Dry
The seasonal high water table is within 12 to 40 inches of the surface (depth to low chroma colors is between 12 to 40 inches): BASIC UPLANDS, SEASONALLY WET
The depth to the seasonal high water table is ≥ 40 inches of the surface
[Criteria]
F136XY710NC – Basic Upland Woodland, Expansive Clay, Seasonally Wet and Dry
F136XY710NC – Basic Upland Woodland, Expansive Clay, Seasonally Wet and Dry
Depth to bedrock is ≥ 40 inches OR the available water storage capacity of the profile is ≥ 6 inches: BASIC UPLANDS, MOIST
Depth to bedrock is < 40 inches AND the available water storage capacity of the profile is < 6 inches: BASIC UPLANDS, DRY
[Criteria]
F136XY720NC – Basic Upland Forest, Moist
F136XY720NC – Basic Upland Forest, Moist
[Criteria]
F136XY730SC – Basic Upland Forest, Depth Restriction, Dry
F136XY730SC – Basic Upland Forest, Depth Restriction, Dry
The seasonal high water table is within 12 inches of the surface (depth to low chroma colors ≤ 12 inches): ACIDIC UPLANDS, SEASONALLY VERY WET
The depth to the seasonal high water table is ≥ 12 inches of the surface
Upland depressions, heads of drains, upland flats
[Criteria]
F136XY800VA – Acidic Upland Depressions and Heads of Drains, Wet
F136XY800VA – Acidic Upland Depressions and Heads of Drains, Wet
The seasonal high water table is within 12 to 40 inches of the surface (depth to low chroma colors is > 12 and < 40 inches): ACIDIC UPLANDS, SEASONALLY WET
The depth to the seasonal high water table is ≥ 40 inches of the surface
Depth to bedrock is ≥ 40 inches OR the available water storage capacity of the profile is ≥ 6 inches
Depth to bedrock is < 40 inches AND the available water storage capacity of the profile is < 6 inches: ACIDIC UPLANDS, SEASONALLY WET, SEASONALLY DRY
[Criteria]
F136XY810SC – Acidic Upland Forest, Seasonally Wet
F136XY810SC – Acidic Upland Forest, Seasonally Wet
[Criteria]
F136XY815NC – Acidic Upland Woodland, Depth Restriction, Seasonally Wet and Dry
F136XY815NC – Acidic Upland Woodland, Depth Restriction, Seasonally Wet and Dry
Depth to bedrock is ≥ 40 inches OR the available water storage capacity of the profile is ≥ 4 inches
Depth to bedrock is < 40 inches AND the available water storage capacity of the profile is < 4 inches: ACIDIC UPLANDS, DRY
Rolling Piedmont plateau
Landscape is highly dissected (e.g., high hills, prominent ridges, monadnocks, etc.)
The particle-size family is coarse-loamy or finer (< 70 percent sand and > 15 percent clay in the subsoil)
Soils formed in sandy, old alluvium reworked by wind (≥ 70 percent sand and ≤ 15 percent clay in the subsoil)
Depth to bedrock is is ≥ 40 inches AND the available water storage capacity of the profile is ≥ 6 inches: ACIDIC UPLANDS, MOIST
Depth to bedrock is < 40 inches AND the available water storage capacity of the profile is < 6 inches: ACIDIC UPLANDS, DRY-MOIST
[Criteria]
F136XY820GA – Acidic Upland Forest, Moist
F136XY820GA – Acidic Upland Forest, Moist
[Criteria]
F136XY830NC – Acidic Upland Forest, Depth Restriction, Dry-moist
F136XY830NC – Acidic Upland Forest, Depth Restriction, Dry-moist
[Criteria]
F136XY835GA – Piedmont Riverine Sandhills
F136XY835GA – Piedmont Riverine Sandhills
Lower landscape positions (footslopes and toeslopes) AND parent materials are colluvium, or a mixture of colluvium and slope alluvium
Upper landscape positions (e.g., summits, shoulders, backslopes, etc.) AND parent materials are residuum
[Criteria]
F136XY840GA – Acidic Upland Colluvial Forest
F136XY840GA – Acidic Upland Colluvial Forest
[Criteria]
F136XY850AL – Acidic High Hills and Isolated Ridges, Dry-moist
F136XY850AL – Acidic High Hills and Isolated Ridges, Dry-moist
Lower Piedmont (ecoregions 45b, 45f)
NOT Lower Piedmont
River and stream bluffs formed through the cutting action of a moving body of water (slope ≥ 28% AND adjacent to a river or stream)
NOT river and stream bluffs
[Criteria]
F136XY860VA – Lower Piedmont Acidic River Bluff Forest
F136XY860VA – Lower Piedmont Acidic River Bluff Forest
[Criteria]
F136XY870GA – Lower Piedmont Acidic Upland Woodland, Depth Restriction, Dry
F136XY870GA – Lower Piedmont Acidic Upland Woodland, Depth Restriction, Dry
NOT Talladega Uplands (ecoregion 45d) or Pine Mountain Ridges (ecoregion 45h)
Talladega Uplands (45d) or Pine Mountain Ridges (45h) ecoregions
High hills, prominent ridges, monadnocks
[Criteria]
F136XY880GA – Acidic High Hills and Isolated Ridges, Depth Restriction, Dry
F136XY880GA – Acidic High Hills and Isolated Ridges, Depth Restriction, Dry
Parent materials are fine-grained metasedimentary rock (phyllite, schist, slate, etc.)
Quartzite ridgetops
[Criteria]
F136XY900AL – Talladega Upland and Pine Mountain Acidic High Hills and Ridges, Dry, Metasedimentary
F136XY900AL – Talladega Upland and Pine Mountain Acidic High Hills and Ridges, Dry, Metasedimentary
[Criteria]
F136XY910AL – Talladega Upland and Pine Mountain Quartzite Ridges, Dry
F136XY910AL – Talladega Upland and Pine Mountain Quartzite Ridges, Dry
Long term average mean annual precipitation
- No filter
- 100 – 120cm (39 – 47in)
- 120 – 140cm (47 – 55in)
- 140 – 500cm (55 – 197in)
—
cm
Long term average frost free days
- No filter
- 150 – 170days
- 170 – 190days
—
days
- No filter
- 0 – 200m (0 – 700ft)
- 200 – 400m (700 – 1300ft)
- 400 – 600m (1300 – 2000ft)
—
m
- No filter
- 0 – 3%
- 3 – 5%
- 5 – 10%
- 10 – 15%
- 15 – 20%
- 20 – 25%
- 25 – 30%
- 30 – 35%
- 35 – 40%
- 40 – 45%
- 45 – 50%
- 50 – 60%
—
%
- No filter
- Backswamp
- Depression
- Drainageway
- Flat
- Flood plain
- Flood-plain step
- Hill
- Hillslope
- Interfluve
- Natural levee
- Ridge
- Slough
- Stream terrace
- No filter
- Amphibolite
- Argillite
- Diabase
- Diorite
- Gabbro
- Gneiss
- Gneiss, hornblende
- Granite
- Igneous and metamorphic
- Igneous, metamorphic and sedimentary
- Metasedimentary, unspecified
- Metavolcanics
- Phyllite
- Quartzite
- Schist, unspecified
- Sedimentary, unspecified
- Slate
- No filter
- Alluvium
- Colluvium
- Eolian sands
- Residuum
- Slope alluvium
Soil surface texture
- No filter
- Clay loam
- Coarse sand
- Coarse sandy loam
- Fine sandy loam
- Loam
- Loamy coarse sand
- Loamy fine sand
- Loamy sand
- Sand
- Sandy clay loam
- Silty clay loam
- Silt loam
- Sandy loam
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Ecological site keys
MLRA 136 - Southern Piedmont
I.
The soil temperature regime is mesic, residing outside the native range of loblolly pine
A.
Parent materials are alluvium: FLOOD PLAINS AND BOTTOMLANDS
1
Active flood plains (site is subject to regular overbank flooding)
i.
The seasonal high water table is within 12 inches of the surface (backswamps, depressions, sloughs, and other wet areas on flood plains): FLOOD PLAINS, VERY WET
ii.
The depth to the seasonal high water table is ≥ 12 inches of the surface
a.
Nearly level flood plains
1)
The seasonal high water table is within 12 to 24 inches of surface (depth to low chroma colors > 12 inches and ≤ 24 inches): FLOOD PLAINS, WET
2)
The depth to the seasonal high water table is ≥ 24 inches of the surface: FLOOD PLAIN, MOIST
b.
Sandy natural levees (> 70% sand throughout) adjacent to larger rivers and streams
2
Above active flood plain (site is NOT subject to regular overbank flooding). Soils are better-developed.
i.
The seasonal high water table is within 12 inches of the surface (depth to low chroma colors ≤ 12 inches): LOW STREAM TERRACES AND DRAINAGEWAYS, VERY WET
T
[Criteria]
... F136XY140VA – Mesic Temperature Regime, Low Terraces and Drains, Occasional Inundation
ii.
The depth to the seasonal high water table is ≥ 12 inches of the surface
a.
Subsoil is red and highly weathered AND flooding frequency is none
1)
Proceed to I.B.: PIEDMONT UPLANDS
b.
Subsoil is NOT red and highly weathered, flooding frequency is rare or occasional
1)
The seasonal high water table is within 12 to 18 inches of surface (depth to low chroma colors > 12 inches and ≤ 18 inches): LOW STREAM TERRACES AND DRAINAGEWAYS, WET
2)
The depth to the seasonal high water table is ≥ 18 inches of the surface: HIGH STREAM TERRACES, MOIST
B.
Parent materials are residuum, colluvium, or highly weathered, old alluvium: PIEDMONT UPLANDS
1
Parent materials are NOT Triassic sedimentary rock
i.
Parent materials are mafic intrusive rock AND base saturation ≥ 35% in the subsoil: BASIC UPLANDS
a.
The seasonal high water table is within 12 inches of the surface (depth to low chroma colors ≤ 12): BASIC UPLANDS, SEASONALLY VERY WET
1)
Upland flats, upland depressions, heads of drains
T
[Criteria]
... F136XY200VA – Mesic Temperature Regime, Basic Upland Flats and Depressions, Expansive Clay, Seasonally Wet and Dry
b.
The depth to the seasonal high water table is ≥ 12 inches of the surface
1)
The seasonal high water table is within 12 to 40 inches of the surface (depth to low chroma colors is > 12 inches and ≤ 40 inches): BASIC UPLANDS, SEASONALLY WET
T
[Criteria]
... F136XY210VA – Mesic Temperature Regime, Basic Upland Woodland, Expansive Clay, Seasonally Wet and Dry
2)
The depth to the seasonal high water table is ≥ 40 inches of the surface
a)
Depth to bedrock is ≥ 40 inches OR the available water storage capacity of the profile is ≥ 6 inches: BASIC UPLANDS, MOIST
b)
Depth to bedrock is < 40 inches AND the available water storage capacity of the profile is < 6 inches: BASIC UPLANDS, DRY
T
[Criteria]
... F136XY230VA – Mesic Temperature Regime, Basic Upland Forest, Depth Restriction, Dry
ii.
Parent materials are NOT mafic intrusive rock OR base saturation < 35%: ACIDIC UPLANDS
a.
The seasonal high water table is within 12 inches of the surface (depth to low chroma colors ≤ 12 inches): ACIDIC UPLANDS, SEASONALLY VERY WET
1)
Upland depressions, heads of drains, upland flats
T
[Criteria]
... F136XY300VA – Mesic Temperature Regime, Acidic Upland Depressions and Heads of Drains, Wet
b.
The depth to the seasonal high water table is ≥ 12 inches of the surface
1)
The seasonal high water table is within 12 to 40 inches of the surface (depth to low chroma colors is > 12 and < 40 inches): ACIDIC UPLANDS, SEASONALLY WET
2)
The depth to the seasonal high water table is ≥ 40 inches of the surface
a)
Depth to bedrock is ≥ 40 inches OR the available water storage capacity of the profile is ≥ 4 inches
(1)
Rolling Piedmont plateau
(a)
Depth to bedrock is ≥ 40 inches AND the available water storage capacity of the profile is ≥ 6 inches: ACIDIC UPLANDS, MOIST
(b)
Depth to bedrock is < 40 inches AND the available water storage capacity of the profile is < 6 inches: ACIDIC UPLANDS, DRY-MOIST
T
[Criteria]
... F136XY330VA – Mesic Temperature Regime, Acidic Upland Forest, Depth Restriction, Dry-moist
(2)
Landscape is highly dissected
(a)
Lower landscape positions (footslopes and toeslopes) AND parent materials are colluvium, or a mixture of colluvium and slope alluvium
b)
Depth to bedrock is < 40 inches AND the available water storage capacity of the profile is < 4 inches: ACIDIC UPLANDS, DRY
(1)
Rolling Piedmont Plateau
T
[Criteria]
... F136XY370VA – Mesic Temperature Regime, Acidic Upland Woodland, Depth Restriction, Dry
(2)
Landscape is highly dissected (e.g., high hills, prominent ridges, monadnocks, etc.)
T
[Criteria]
... F136XY380VA – Mesic Temperature Regime, Acidic High Hills and Isolated Ridges, Depth Restriction, Dry
2
Parent materials are Triassic sedimentary rock: TRIASSIC BASIN UPLANDS
i.
The seasonal high water table is within 12 inches of the surface: TRIASSIC BASIN UPLANDS, SEASONALLY VERY WET
a.
Parent materials are strongly basic sedimentary rock (Triassic shale, siltstone, mudstone, etc.) and react with dilute hydrochloric acid
T
[Criteria]
... F136XY200VA – Mesic Temperature Regime, Basic Upland Flats and Depressions, Expansive Clay, Seasonally Wet and Dry
ii.
The depth to the seasonal high water table is ≥ 12 inches of the surface
a.
The seasonal high water table is within 12 to 40 inches of the surface (depth to low chroma colors is between 12 to 40 inches): TRIASSIC BASIN UPLANDS, SEASONALLY WET
1)
Shrink-swell potential is very high (subsoil is sticky when wet, becoming hard when dry)
T
[Criteria]
... F136XY400NC – Triassic Basin Upland Woodland, Expansive Clay, Seasonally Wet and Dry
2)
Shrink-swell potential is NOT very high
b.
The depth to the seasonal high water table is ≥ 40 inches of the surface
1)
Depth to bedrock is ≥ 40 inches OR the available water storage capacity of the profile is ≥ 4 inches: TRIASSIC BASIN UPLANDS, MOIST TO DRY-MOIST
2)
Depth to bedrock is < 40 inches AND the available water storage capacity of the profile is < 4 inches: TRIASSIC BASIN UPLANDS, DRY
II.
The soil temperature regime is thermic, residing inside the native range of loblolly pine
A.
Parent materials are Triassic sedimentary rock: TRIASSIC BASIN UPLANDS
1
The seasonal high water table is within 12 to 40 inches of the surface (depth to low chroma colors is between 12 to 40 inches): TRIASSIC BASIN UPLANDS, SEASONALLY WET
i.
Shrink-swell potential is very high (subsoil is sticky when wet, becoming hard when dry)
T
[Criteria]
... F136XY400NC – Triassic Basin Upland Woodland, Expansive Clay, Seasonally Wet and Dry
ii.
Shrink-swell potential is NOT very high
2
The depth to the seasonal high water table is ≥ 40 inches of the surface
i.
Depth to bedrock is ≥ 40 inches OR the available water storage capacity of the profile is ≥ 4 inches: TRIASSIC BASIN UPLANDS, MOIST TO DRY-MOIST
ii.
Depth to bedrock is < 40 inches AND the available water storage capacity of the profile is < 4 inches: TRIASSIC BASIN UPLANDS, DRY
B.
Parent materials are NOT Triassic sedimentary rock
1
Parent materials are alluvium: FLOOD PLAINS AND BOTTOMLANDS
i.
Active flood plains (site is subject to regular overbank flooding)
a.
The seasonal high water table is within 12 inches of the surface (backswamps, depressions, sloughs, and other wet areas on flood plains): FLOOD PLAINS, VERY WET
b.
The depth to the seasonal high water table is ≥ 12 inches of the surface
1)
Nearly level flood plains
a)
The seasonal high water table is within 12 to 24 inches of surface (depth to low chroma colors > 12 inches and ≤ 24 inches): FLOOD PLAINS, WET
b)
The depth to the seasonal high water table is ≥ 24 inches of the surface: FLOOD PLAINS, MOIST
2)
Sandy natural levees (> 70% sand throughout) adjacent to larger rivers and streams
ii.
Above active flood plain (site is NOT subject to regular overbank flooding). Soils are better-developed.
a.
The seasonal high water table is within 12 inches of the surface (depth to low chroma colors ≤ 12 inches): LOW STREAM TERRACES AND DRAINAGEWAYS, VERY WET
b.
The depth to the seasonal high water table is ≥ 12 inches of the surface
1)
Subsoil is red and highly weathered AND flooding frequency is none
a)
Proceed to II.B.2.: PIEDMONT UPLANDS
2)
Subsoil is NOT red and highly weathered, flooding frequency is rare or occasional
a)
The seasonal high water table is within 12 to 18 inches of surface (depth to low chroma colors > 12 inches and ≤ 18 inches): LOW STREAM TERRACES AND DRAINAGEWAYS, WET
b)
The depth to the seasonal high water table is ≥ 18 inches of the surface: HIGH STREAM TERRACES, MOIST
2
Parent materials are residuum, colluvium, or highly weathered, old alluvium: PIEDMONT UPLANDS
i.
Parent materials are mafic intrusive rock AND base saturation ≥ 35% in the subsoil: BASIC UPLANDS
a.
The seasonal high water table is within 12 inches of the surface (depth to low chroma colors ≤ 12 inches): BASIC UPLANDS, SEASONALLY VERY WET
1)
Upland flats, upland depressions, heads of drains
T
[Criteria]
... F136XY700NC – Basic Upland Flats and Depressions, Expansive Clay, Seasonally Wet and Dry
b.
The depth to the seasonal high water table is ≥ 12 inches of the surface
1)
The seasonal high water table is within 12 to 40 inches of the surface (depth to low chroma colors is between 12 to 40 inches): BASIC UPLANDS, SEASONALLY WET
2)
The depth to the seasonal high water table is ≥ 40 inches of the surface
a)
Depth to bedrock is ≥ 40 inches OR the available water storage capacity of the profile is ≥ 6 inches: BASIC UPLANDS, MOIST
b)
Depth to bedrock is < 40 inches AND the available water storage capacity of the profile is < 6 inches: BASIC UPLANDS, DRY
ii.
Parent materials are NOT mafic intrusive rock OR base saturation < 35%: ACIDIC UPLANDS
a.
The seasonal high water table is within 12 inches of the surface (depth to low chroma colors ≤ 12 inches): ACIDIC UPLANDS, SEASONALLY VERY WET
1)
Upland depressions, heads of drains, upland flats
b.
The depth to the seasonal high water table is ≥ 12 inches of the surface
1)
The seasonal high water table is within 12 to 40 inches of the surface (depth to low chroma colors is > 12 and < 40 inches): ACIDIC UPLANDS, SEASONALLY WET
a)
Depth to bedrock is ≥ 40 inches OR the available water storage capacity of the profile is ≥ 6 inches
b)
Depth to bedrock is < 40 inches AND the available water storage capacity of the profile is < 6 inches: ACIDIC UPLANDS, SEASONALLY WET, SEASONALLY DRY
2)
The depth to the seasonal high water table is ≥ 40 inches of the surface
a)
Depth to bedrock is ≥ 40 inches OR the available water storage capacity of the profile is ≥ 4 inches
(1)
Rolling Piedmont plateau
(a)
The particle-size family is coarse-loamy or finer (< 70 percent sand and > 15 percent clay in the subsoil)
(1)
Depth to bedrock is is ≥ 40 inches AND the available water storage capacity of the profile is ≥ 6 inches: ACIDIC UPLANDS, MOIST
(2)
Depth to bedrock is < 40 inches AND the available water storage capacity of the profile is < 6 inches: ACIDIC UPLANDS, DRY-MOIST
(b)
Soils formed in sandy, old alluvium reworked by wind (≥ 70 percent sand and ≤ 15 percent clay in the subsoil)
(2)
Landscape is highly dissected (e.g., high hills, prominent ridges, monadnocks, etc.)
(a)
Lower landscape positions (footslopes and toeslopes) AND parent materials are colluvium, or a mixture of colluvium and slope alluvium
(b)
Upper landscape positions (e.g., summits, shoulders, backslopes, etc.) AND parent materials are residuum
b)
Depth to bedrock is < 40 inches AND the available water storage capacity of the profile is < 4 inches: ACIDIC UPLANDS, DRY
(1)
Lower Piedmont (ecoregions 45b, 45f)
(a)
River and stream bluffs formed through the cutting action of a moving body of water (slope ≥ 28% AND adjacent to a river or stream)
(b)
NOT river and stream bluffs
(2)
NOT Lower Piedmont
(a)
NOT Talladega Uplands (ecoregion 45d) or Pine Mountain Ridges (ecoregion 45h)
(1)
High hills, prominent ridges, monadnocks
(b)
Talladega Uplands (45d) or Pine Mountain Ridges (45h) ecoregions
(1)
Parent materials are fine-grained metasedimentary rock (phyllite, schist, slate, etc.)
T
[Criteria]
... F136XY900AL – Talladega Upland and Pine Mountain Acidic High Hills and Ridges, Dry, Metasedimentary
(2)
Quartzite ridgetops
The Ecosystem Dynamics Interpretive Tool is an information system framework developed by the USDA-ARS Jornada Experimental Range, USDA Natural Resources Conservation Service, and New Mexico State University.
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