Natural Resources
Conservation Service
Major Land Resource Area 136X
Major Land Resource Area
Accessed: 04/16/2026
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ProvisionalPX136X00X140/F136XY140VAMesic Temperature Regime, Low Terraces and Drains, Occasional Inundation -
ProvisionalPX136X00X150/F136XY150VAMesic Temperature Regime, Low Terraces and Drains, Rare Inundation
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ProvisionalPX136X00X230/F136XY230VAMesic Temperature Regime, Basic Upland Forest, Depth Restriction, Dry
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ProvisionalPX136X00X300/F136XY300VAMesic Temperature Regime, Acidic Upland Depressions and Heads of Drains, Wet
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ProvisionalPX136X00X330/F136XY330VAMesic Temperature Regime, Acidic Upland Forest, Depth Restriction, Dry-moist
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ProvisionalPX136X00X370/F136XY370VAMesic Temperature Regime, Acidic Upland Woodland, Depth Restriction, Dry
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ProvisionalPX136X00X400/F136XY400NCTriassic Basin Upland Woodland, Expansive Clay, Seasonally Wet and Dry
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ProvisionalPX136X00X700/F136XY700NCBasic Upland Flats and Depressions, Expansive Clay, Seasonally Wet and Dry
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ProvisionalPX136X00X815/F136XY815NCAcidic Upland Woodland, Depth Restriction, Seasonally Wet and Dry
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Ecological sites
Major Land Resource Areas
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Soil texture
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]
PX136X00X100 – Mesic Temperature Regime, Flood Plain Forest, Very Wet
PX136X00X100 – 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]
PX136X00X110 – Mesic Temperature Regime, Flood Plain Forest, Wet
PX136X00X110 – Mesic Temperature Regime, Flood Plain Forest, Wet
[Criteria]
PX136X00X120 – Mesic Temperature Regime, Flood Plain Forest, Moist
PX136X00X120 – Mesic Temperature Regime, Flood Plain Forest, Moist
[Criteria]
PX136X00X130 – Mesic Temperature Regime, Flood Plain Levee Forest, Sandy
PX136X00X130 – 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]
PX136X00X140 – Mesic Temperature Regime, Low Terraces and Drains, Occasional Inundation
PX136X00X140 – 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]
PX136X00X150 – Mesic Temperature Regime, Low Terraces and Drains, Rare Inundation
PX136X00X150 – Mesic Temperature Regime, Low Terraces and Drains, Rare Inundation
[Criteria]
PX136X00X160 – Mesic Temperature Regime, High Terraces, Very Rare Inundation
PX136X00X160 – 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]
PX136X00X200 – Mesic Temperature Regime, Basic Upland Flats and Depressions, Expansive Clay, Seasonally Wet and Dry
PX136X00X200 – 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]
PX136X00X210 – Mesic Temperature Regime, Basic Upland Woodland, Expansive Clay, Seasonally Wet and Dry
PX136X00X210 – 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]
PX136X00X220 – Mesic Temperature Regime, Basic Upland Forest, Moist
PX136X00X220 – Mesic Temperature Regime, Basic Upland Forest, Moist
[Criteria]
PX136X00X230 – Mesic Temperature Regime, Basic Upland Forest, Depth Restriction, Dry
PX136X00X230 – 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]
PX136X00X300 – Mesic Temperature Regime, Acidic Upland Depressions and Heads of Drains, Wet
PX136X00X300 – 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]
PX136X00X310 – Mesic Temperature Regime, Acidic Upland Forest, Seasonally Wet
PX136X00X310 – 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]
PX136X00X320 – Mesic Temperature Regime, Acidic Upland Forest, Moist
PX136X00X320 – Mesic Temperature Regime, Acidic Upland Forest, Moist
[Criteria]
PX136X00X330 – Mesic Temperature Regime, Acidic Upland Forest, Depth Restriction, Dry-moist
PX136X00X330 – 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]
PX136X00X340 – Mesic Temperature Regime, Acidic Upland Colluvial Forest
PX136X00X340 – Mesic Temperature Regime, Acidic Upland Colluvial Forest
Rolling Piedmont Plateau
Landscape is highly dissected (e.g., high hills, prominent ridges, monadnocks, etc.)
[Criteria]
PX136X00X370 – Mesic Temperature Regime, Acidic Upland Woodland, Depth Restriction, Dry
PX136X00X370 – Mesic Temperature Regime, Acidic Upland Woodland, Depth Restriction, Dry
[Criteria]
PX136X00X380 – Mesic Temperature Regime, Acidic High Hills and Isolated Ridges, Depth Restriction, Dry
PX136X00X380 – 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]
PX136X00X200 – Mesic Temperature Regime, Basic Upland Flats and Depressions, Expansive Clay, Seasonally Wet and Dry
PX136X00X200 – 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]
PX136X00X400 – Triassic Basin Upland Woodland, Expansive Clay, Seasonally Wet and Dry
PX136X00X400 – Triassic Basin Upland Woodland, Expansive Clay, Seasonally Wet and Dry
[Criteria]
PX136X00X410 – Triassic Basin Upland Forest, Seasonally Wet
PX136X00X410 – 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]
PX136X00X420 – Triassic Basin Upland Forest, Moist
PX136X00X420 – Triassic Basin Upland Forest, Moist
[Criteria]
PX136X00X430 – Triassic Basin Upland Forest, Dry
PX136X00X430 – 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]
PX136X00X400 – Triassic Basin Upland Woodland, Expansive Clay, Seasonally Wet and Dry
PX136X00X400 – Triassic Basin Upland Woodland, Expansive Clay, Seasonally Wet and Dry
[Criteria]
PX136X00X410 – Triassic Basin Upland Forest, Seasonally Wet
PX136X00X410 – 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]
PX136X00X420 – Triassic Basin Upland Forest, Moist
PX136X00X420 – Triassic Basin Upland Forest, Moist
[Criteria]
PX136X00X430 – Triassic Basin Upland Forest, Dry
PX136X00X430 – 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]
PX136X00X600 – Flood Plain Forest, Very Wet
PX136X00X600 – 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]
PX136X00X610 – Flood Plain Forest, Wet
PX136X00X610 – Flood Plain Forest, Wet
[Criteria]
PX136X00X620 – Flood Plain Forest, Moist
PX136X00X620 – Flood Plain Forest, Moist
[Criteria]
PX136X00X630 – Flood Plain Levee Forest, Sandy
PX136X00X630 – 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]
PX136X00X640 – Low Terraces and Drains, Occasional Inundation
PX136X00X640 – 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]
PX136X00X650 – Low Terraces and Drains, Rare Inundation
PX136X00X650 – Low Terraces and Drains, Rare Inundation
[Criteria]
PX136X00X660 – High Terraces, Very Rare Inundation
PX136X00X660 – 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]
PX136X00X700 – Basic Upland Flats and Depressions, Expansive Clay, Seasonally Wet and Dry
PX136X00X700 – 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]
PX136X00X710 – Basic Upland Woodland, Expansive Clay, Seasonally Wet and Dry
PX136X00X710 – 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]
PX136X00X720 – Basic Upland Forest, Moist
PX136X00X720 – Basic Upland Forest, Moist
[Criteria]
PX136X00X730 – Basic Upland Forest, Depth Restriction, Dry
PX136X00X730 – 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]
PX136X00X800 – Acidic Upland Depressions and Heads of Drains, Wet
PX136X00X800 – 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]
PX136X00X810 – Acidic Upland Forest, Seasonally Wet
PX136X00X810 – Acidic Upland Forest, Seasonally Wet
[Criteria]
PX136X00X815 – Acidic Upland Woodland, Depth Restriction, Seasonally Wet and Dry
PX136X00X815 – 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]
PX136X00X820 – Acidic Upland Forest, Moist
PX136X00X820 – Acidic Upland Forest, Moist
[Criteria]
PX136X00X830 – Acidic Upland Forest, Depth Restriction, Dry-moist
PX136X00X830 – Acidic Upland Forest, Depth Restriction, Dry-moist
[Criteria]
PX136X00X835 – Piedmont Riverine Sandhills
PX136X00X835 – 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]
PX136X00X840 – Acidic Upland Colluvial Forest
PX136X00X840 – Acidic Upland Colluvial Forest
[Criteria]
PX136X00X850 – Acidic High Hills and Isolated Ridges, Dry-moist
PX136X00X850 – 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]
PX136X00X860 – Lower Piedmont Acidic River Bluff Forest
PX136X00X860 – Lower Piedmont Acidic River Bluff Forest
[Criteria]
PX136X00X870 – Lower Piedmont Acidic Upland Woodland, Depth Restriction, Dry
PX136X00X870 – 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]
PX136X00X880 – Acidic High Hills and Isolated Ridges, Depth Restriction, Dry
PX136X00X880 – Acidic High Hills and Isolated Ridges, Depth Restriction, Dry
Parent materials are fine-grained metasedimentary rock (phyllite, schist, slate, etc.)
Quartzite ridgetops
[Criteria]
PX136X00X900 – Talladega Upland and Pine Mountain Acidic High Hills and Ridges, Dry, Metasedimentary
PX136X00X900 – Talladega Upland and Pine Mountain Acidic High Hills and Ridges, Dry, Metasedimentary
[Criteria]
PX136X00X910 – Talladega Upland and Pine Mountain Quartzite Ridges, Dry
PX136X00X910 – 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]
... PX136X00X140 – 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]
... PX136X00X200 – 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]
... PX136X00X210 – 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]
... PX136X00X230 – 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]
... PX136X00X300 – 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]
... PX136X00X330 – 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]
... PX136X00X370 – Mesic Temperature Regime, Acidic Upland Woodland, Depth Restriction, Dry
(2)
Landscape is highly dissected (e.g., high hills, prominent ridges, monadnocks, etc.)
T
[Criteria]
... PX136X00X380 – 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]
... PX136X00X200 – 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]
... PX136X00X400 – 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]
... PX136X00X400 – 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]
... PX136X00X700 – 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]
... PX136X00X900 – 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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