Major Land Resource Area 083D
Lower Rio Grande Plain
Accessed: 11/21/2024
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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
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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
- Permanent water table at/or near surface and ponded for most of year
-
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 floodplain 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 floodplain 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 floodplain or drainageway
- All others
- All others
- All others
- All others
- Low flood plain with loamy‐textured soils and prominent channel
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-
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
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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, higher in clay content, perch water more readily, and droughtier
-
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 MLRAs 83B, 83C, or 83D
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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 83D
I.
Depth to densic material less than 40 inches
A.
Soils with gravels in epipedon
1.
Greater than 15 percent of soil surface covered by large pebbles
2.
Less than 15 percent of soil surface covered by large pebbles
i.
Strongly cemented calcium carbonate within 20 inches
B.
Soils without gravels in epipedon
2.
All others
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
... R083DY006TX – Fresh Marsh
ii.
Soils with fluctuating water table levels and ponded after heavy rains
... R083DY007TX – Lakebed
2.
Soils in floodplain or drainageway
i.
Visible salts within 40 inches
ii.
All others
b.
All others
1)
Soils with deep sands and effervescent throughout profile
2)
All others
a)
Soils with a developed argillic horizon
b)
All others
ii)
Low flood plain with loamy‐textured soils and prominent channel
... R083DY013TX – Loamy Bottomland
B.
Soils on other landforms
1.
Visible salts within 24 inches
i.
Soils with sandy or sandy loam surface textures
ii.
All others
a.
Soils classifed as vertisols with high shrink‐swell potential
b.
Soils belonging to other taxonomic orders with low to moderate shrink‐swell potential
2.
All others
i.
Soils classifed as vertisols with high shrink‐swell potential
a.
Dark‐colored surface with value/chroma of 3/1 or darker and non‐sodic
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
a)
Soils with sandy textures greater than 80 inches deep
b)
All others
i)
Depth to argillic greater than 14 inches
1)
Textural change of argillic greater than 30 inches
2)
Textural change of argillic within than 30 inches
ii)
Depth to argillic less than 14 inches
1)
Subsoils slightly deeper, slightly lower in clay content, and more permeable
... R083DY023TX – Sandy Loam
2)
Subsoils slightly more shallow, higher in clay content, perch water more readily, and droughtier
... R083DY024TX – Tight Sandy Loam
2)
Soils with clay loam, sandy clay loam, or silty clay loam surface textures
b)
Soils in MLRA 83A
i)
Soils from center of Atascosa County east
ii)
Soils from center of Atascosa County west
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Ecological sites
Major Land Resource Areas
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.
