Major Land Resource Area 133B

Western Coastal Plain

Accessed: 12/21/2024

Home / Esd catalog / MLRA 133B

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Land Resource Regions and Major Land Resource Areas of the United States, the Caribbean, and the Pacific Basin

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2

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Ecological site list

Provisional

F133BY001TX/F133BY001TX

Depression
i
Key Characteristics
1. Sites on uplands and terraces
2. Depressions on uplands and terraces
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Provisional

F133BY002TX/F133BY002TX

Seasonally Wet Upland
i
Key Characteristics
1. Sites on uplands and terraces
2. All others
3. Sites on uplands
4. Sites with prolonged seasonal wetness
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Provisional

F133BY003TX/F133BY003TX

Loamy Over Clayey Upland
i
Key Characteristics
1. Sites on uplands and terraces
2. All others
3. Sites on uplands
4. Sites without surface wetness, or only short duration after precipitation events
5. Sandy or sandy loam soils to 20 inches
6. Soils with heavy clay subsoil
7. Fine sandy loam surface textures over clayey subsoil, generally without high shrink-swell properties
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Provisional

F133BY004TX/F133BY004TX

Loamy Claypan Upland
i
Key Characteristics
1. Sites on uplands and terraces
2. All others
3. Sites on uplands
4. Sites without surface wetness, or only short duration after precipitation events
5. Sandy or sandy loam soils to 20 inches
6. Soils with heavy clay subsoil
7. Abrupt textural change with greater than 20 percent increase in clay, associated with high shrink-swell properties
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Provisional

F133BY005TX/F133BY005TX

Loamy Upland
i
Key Characteristics
1. Sites on uplands and terraces
2. All others
3. Sites on uplands
4. Sites without surface wetness, or only short duration after precipitation events
5. Sandy or sandy loam soils to 20 inches
6. Loamy soils throughout surface and subsoil
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Provisional

F133BY006TX/F133BY006TX

Northern Sandy Loam Upland
i
Key Characteristics
1. Sites on uplands and terraces
2. All others
3. Sites on uplands
4. Sites without surface wetness, or only short duration after precipitation events
5. Sandy or sandy loam soils to 20 inches
6. Sandy and sandy loam soils greater than 20 inches but less than 40 inches
7. Sites north of Nacogdoches
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Provisional

F133BY007TX/F133BY007TX

Southern Sandy Loam Upland
i
Key Characteristics
1. Sites on uplands and terraces
2. All others
3. Sites on uplands
4. Sites without surface wetness, or only short duration after precipitation events
5. Sandy or sandy loam soils to 20 inches
6. Sandy and sandy loam soils greater than 20 inches but less than 40 inches
7. Sites south of Nacogdoches
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Provisional

F133BY008TX/F133BY008TX

Northern Deep Sandy Upland
i
Key Characteristics
1. Sites on uplands and terraces
2. All others
3. Sites on uplands
4. Sites without surface wetness, or only short duration after precipitation events
5. Sandy or sandy loam soils to 20 inches
6. Sandy soils greater than 40 inches
7. Sandy soils extending greater than 40 inches but less than 80 inches
8. Sites north of Nacogdoches
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Provisional

F133BY009TX/F133BY009TX

Southern Deep Sandy Upland
i
Key Characteristics
1. Sites on uplands and terraces
2. All others
3. Sites on uplands
4. Sites without surface wetness, or only short duration after precipitation events
5. Sandy or sandy loam soils to 20 inches
6. Sandy soils greater than 40 inches
7. Sandy soils extending greater than 40 inches but less than 80 inches
8. Sites south of Nacogdoches
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Provisional

F133BY010TX/F133BY010TX

Very Deep Sandy Upland

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Provisional

F133BY011TX/F133BY011TX

Deep Sandy Terrace
i
Key Characteristics
1. Sites on uplands and terraces
2. All others
3. Sites on terraces
4. Other terraces
5. Sandy soils extending below 40 inches
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Provisional

F133BY012TX/F133BY012TX

Wet Terrace
i
Key Characteristics
1. Sites on uplands and terraces
2. All others
3. Sites on terraces
4. Sites with prolonged wetness after precipitation events
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Provisional

F133BY013TX/F133BY013TX

Terrace
i
Key Characteristics
1. Sites on uplands and terraces
2. All others
3. Sites on terraces
4. Other terraces
5. Other terraces
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Provisional

F133BY014TX/F133BY014TX

Creek Bottomland
i
Key Characteristics
1. Sites on bottomlands and alluvial drains
2. Bottomlands with other flooding regimes
3. Quick-flowing bottomlands with narrow channels and short duration flooding
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Provisional

F133BY015TX/F133BY015TX

Swamp
i
Key Characteristics
1. Sites on bottomlands and alluvial drains
2. Soils are semi-permanently flooded and frequently ponded
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Provisional

F133BY016TX/F133BY016TX

Sandy Bottomland
i
Key Characteristics
1. Sites on bottomlands and alluvial drains
2. Bottomlands with other flooding regimes
3. Other bottoms
4. Bottomlands with sandy soils
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Provisional

F133BY017TX/F133BY017TX

Loamy Bottomland
i
Key Characteristics
1. Sites on bottomlands and alluvial drains
2. Bottomlands with other flooding regimes
3. Other bottoms
4. Loamy or clayey bottomlands
5. Soils predominantly loamy
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Provisional

F133BY018TX/F133BY018TX

Clayey Bottomland
i
Key Characteristics
1. Sites on bottomlands and alluvial drains
2. Bottomlands with other flooding regimes
3. Other bottoms
4. Loamy or clayey bottomlands
5. Soils predominantly clayey
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Ecological site map

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Zoom in to display soil survey map units for an area of interest, and zoom out to display MLRAs. Select a map unit polygon to view ecological sites correlated to that map unit. View a brief description of an ecological site by clicking on its name in the map popup. Soil survey correlations may not be accurate, and ecological site classification of a location should always be verified in the field. Each selection may require the transfer of several hundred KB of data.

Ecological site keys

MLRA 133B

I. Sites on uplands and terraces

A. Depressions on uplands and terraces ... F133BY001TX – Depression

B. All others

1 Sites on uplands

i. Sites with prolonged seasonal wetness ... F133BY002TX – Seasonally Wet Upland

ii. Sites without surface wetness, or only short duration after precipitation events

a. Sandy or sandy loam soils to 20 inches

1) Sandy and sandy loam soils greater than 20 inches but less than 40 inches

a) Sites north of Nacogdoches ... F133BY006TX – Northern Sandy Loam Upland

b) Sites south of Nacogdoches ... F133BY007TX – Southern Sandy Loam Upland

2) Sandy soils greater than 40 inches

a) Sandy soils extending greater than 40 inches but less than 80 inches

i) Sites north of Nacogdoches ... F133BY008TX – Northern Deep Sandy Upland

ii) Sites south of Nacogdoches ... F133BY009TX – Southern Deep Sandy Upland

b) Sandy soils greater than 80 inches

b. Surface soil textures variable, but loamy or clayey subsoil

1) Loamy soils throughout surface and subsoil ... F133BY005TX – Loamy Upland

2) Soils with heavy clay subsoil

a) Fine sandy loam surface textures over clayey subsoil, generally without high shrink-swell properties ... F133BY003TX – Loamy Over Clayey Upland

b) Abrupt textural change with greater than 20 percent increase in clay, associated with high shrink-swell properties ... F133BY004TX – Loamy Claypan Upland

2 Sites on terraces

i. Sites with prolonged wetness after precipitation events ... F133BY012TX – Wet Terrace

ii. Other terraces

a. Sandy soils extending below 40 inches ... F133BY011TX – Deep Sandy Terrace

b. Other terraces ... F133BY013TX – Terrace

II. Sites on bottomlands and alluvial drains

A. Soils are semi-permanently flooded and frequently ponded ... F133BY015TX – Swamp

B. Bottomlands with other flooding regimes

1 Quick-flowing bottomlands with narrow channels and short duration flooding ... F133BY014TX – Creek Bottomland

2 Other bottoms

i. Bottomlands with sandy soils ... F133BY016TX – Sandy Bottomland

ii. Loamy or clayey bottomlands

a. Soils predominantly loamy ... F133BY017TX – Loamy Bottomland

b. Soils predominantly clayey ... F133BY018TX – Clayey Bottomland

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