Major Land Resource Area 083A
Northern Rio Grande Plain
Accessed: 12/30/2024
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1
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2
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Next, learn more about the selected ecological site and its characteristic dynamics by browsing the ecological site description and exploring alternative state and transition model formats.
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i
Key Characteristics
- Depth to densic material less than 40 inches
- Soils with gravels in epipedon
- Greater than 15 percent of soil surface covered by large pebbles
-
i
Key Characteristics
- Depth to densic material less than 40 inches
- Soils with gravels in epipedon
- Less than 15 percent of soil surface covered by large pebbles
- Strongly cemented calcium carbonate less than 20 inches
-
i
Key Characteristics
- Depth to densic material less than 40 inches
- Soils with gravels in epipedon
- Less than 15 percent of soil surface covered by large pebbles
- All others
-
i
Key Characteristics
- Depth to densic material less than 40 inches
- Soils without gravels in epipedon
- Soils with sandy loam or loam surface texture
-
i
Key Characteristics
- Depth to densic material less than 40 inches
- Soils without gravels in epipedon
- All others
-
i
Key Characteristics
- Soils are deep to very deep, greater than 40 inches
- Soils on depressions, drainageways, or flood plains
- Soils in a closed depression
- Soils with fluctuating water table levels and ponded after heavy rains
-
i
Key Characteristics
- Soils are deep to very deep, greater than 40 inches
- Soils on depressions, drainageways, or flood plains
- Soils in flood plain or drainageway
- Visible salts less than 40 inches
-
i
Key Characteristics
- Soils are deep to very deep, greater than 40 inches
- Soils on depressions, drainageways, or flood plains
- Soils in flood plain or drainageway
- All others
- Soils with fine surface textures (clay and silty clay)
-
i
Key Characteristics
- Soils are deep to very deep, greater than 40 inches
- Soils on depressions, drainageways, or flood plains
- Soils in flood plain or drainageway
- All others
- All others
- Soils with deep sands and effervescent throughout profile
-
i
Key Characteristics
- Soils are deep to very deep, greater than 40 inches
- Soils on depressions, drainageways, or flood plains
- Soils in flood plain or drainageway
- All others
- All others
- All others
- Soils with a developed argillic horizon
-
i
Key Characteristics
- Soils are deep to very deep, greater than 40 inches
- Soils on depressions, drainageways, or flood plains
- Soils in flood plain or drainageway
- All others
- All others
- All others
- All others
- Upland drainageway without defined, prominent channel
-
i
Key Characteristics
- Soils are deep to very deep, greater than 40 inches
- Soils on depressions, drainageways, or flood plains
- Soils in flood plain or drainageway
- All others
- All others
- All others
- All others
- Low flood plain with loamy soils and prominent channel
-
i
Key Characteristics
- Soils are deep to very deep, greater than 40 inches
- Soils on other landforms
- Visible salts less than 24 inches
- All others
- Soils belonging to other taxonomic orders with low to moderate shrink‐swell potential
-
i
Key Characteristics
- Soils are deep to very deep, greater than 40 inches
- Soils on other landforms
- All others
- Soils classified as vertisols with high shrink‐swell potential
- Dark‐colored surface with value/chroma of 3/1 or darker and non‐sodic
-
i
Key Characteristics
- Soils are deep to very deep, greater than 40 inches
- Soils on other landforms
- All others
- All others
- Soil profile is effervescent to the surface
-
i
Key Characteristics
- Soils are deep to very deep, greater than 40 inches
- Soils on other landforms
- All others
- All others
- All others
- Soils with fine sandy loam, sandy loam, or loamy sand surface textures
- Soils with sandy textures greater than 80 inches deep
-
i
Key Characteristics
- Soils are deep to very deep, greater than 40 inches
- Soils on other landforms
- All others
- All others
- All others
- Soils with fine sandy loam, sandy loam, or loamy sand surface textures
- All others
- Depth to argillic greater than 14 inches
- Textural change of argillic greater than 30 inches
-
i
Key Characteristics
- Soils are deep to very deep, greater than 40 inches
- Soils on other landforms
- All others
- All others
- All others
- Soils with fine sandy loam, sandy loam, or loamy sand surface textures
- All others
- Depth to argillic greater than 14 inches
- Textural change of argillic less than than 30 inches
-
i
Key Characteristics
- Soils are deep to very deep, greater than 40 inches
- Soils on other landforms
- All others
- All others
- All others
- Soils with fine sandy loam, sandy loam, or loamy sand surface textures
- All others
- Depth to argillic less than 14 inches
- Subsoils slightly deeper, slightly lower in clay content, and more permeable
-
i
Key Characteristics
- Soils are deep to very deep, greater than 40 inches
- Soils on other landforms
- All others
- All others
- All others
- Soils with fine sandy loam, sandy loam, or loamy sand surface textures
- All others
- Depth to argillic less than 14 inches
- Subsoils slightly more shallow, more droughty, higher in clay content, and perch water more readily
-
i
Key Characteristics
- Soils are deep to very deep, greater than 40 inches
- Soils on other landforms
- All others
- All others
- All others
- Soils with clay loam, sandy clay loam, or silty clay loam surface textures
- Soils in MLRA 83A
- Soils from center of Atascosa County east
-
i
Key Characteristics
- Soils are deep to very deep, greater than 40 inches
- Soils on other landforms
- All others
- All others
- All others
- Soils with clay loam, sandy clay loam, or silty clay loam surface textures
- Soils in MLRA 83A
- Soils from center of Atascosa County west
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 83A
I.
Depth to densic material less than 40 inches
A.
Soils with gravels in epipedon
2
Less than 15 percent of soil surface covered by large pebbles
B.
Soils without gravels in epipedon
II.
Soils are deep to very deep, greater than 40 inches
A.
Soils on depressions, drainageways, or flood plains
1
Soils in a closed depression
i.
Permanent water table at/or near surface and ponded for most of year
ii.
Soils with fluctuating water table levels and ponded after heavy rains
... R083AY007TX – Lakebed
2
Soils in flood plain or drainageway
ii.
All others
b.
All others
2)
All others
b)
All others
B.
Soils on other landforms
1
Visible salts less than 24 inches
i.
Soils with sandy or sandy loam surface textures
ii.
All others
a.
Soils classified as vertisols with high shrink‐swell potential
b.
Soils belonging to other taxonomic orders with low to moderate shrink‐swell potential
... R083AY016TX – Saline Clay Loam
2
All others
i.
Soils classified as vertisols with high shrink‐swell potential
a.
Dark‐colored surface with value/chroma of 3/1 or darker and non‐sodic
... R083AY017TX – Blackland
b.
Lighter‐colored surface and sodic
ii.
All others
b.
All others
1)
Soils with fine sandy loam, sandy loam, or loamy sand surface textures
b)
All others
i)
Depth to argillic greater than 14 inches
ii)
Depth to argillic less than 14 inches
1)
Subsoils slightly deeper, slightly lower in clay content, and more permeable
... R083AY023TX – Sandy Loam
2)
Subsoils slightly more shallow, more droughty, higher in clay content, and perch water more readily
... R083AY024TX – Tight Sandy Loam
2)
Soils with clay loam, sandy clay loam, or silty clay loam surface textures
a)
Soils in MLRAs 83B, 83C, or 83D
b)
Soils in MLRA 83A
Ecological site photos
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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.
