Major Land Resource Area 119X
Ouachita Mountains
Accessed: 11/21/2024
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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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Key Characteristics
- Soils formed in residuum and/or colluvium (summits, backslopes, and foot slopes of dissected plateaus, hills, and mountains).
- Soils are shallow or very shallow (Less than 50 cm depth), loamy or fine loamy (18 to 35 percent clay) in the particle size control section.
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Key Characteristics
- Soils formed in residuum and/or colluvium (summits, backslopes, and foot slopes of dissected plateaus, hills, and mountains).
- Soils are moderately deep, deep, or very deep (greater than 50 cm depth).
- Clayey or fine (35 to 60 percent clay) in particle size control section.
- Soils are well drained. A perched water table occurs below 30 cm, if present.
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i
Key Characteristics
- Soils formed in residuum and/or colluvium (summits, backslopes, and foot slopes of dissected plateaus, hills, and mountains).
- Soils are moderately deep, deep, or very deep (greater than 50 cm depth).
- Loamy or fine loamy (18 to 35 percent clay) in the particle size control section.
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i
Key Characteristics
- Soils formed in residuum and/or colluvium (summits, backslopes, and foot slopes of dissected plateaus, hills, and mountains).
- Soils are moderately deep, deep, or very deep (greater than 50 cm depth).
- Clayey or fine (35 to 60 percent clay) in particle size control section.
- Soils are moderately well drained with a perched water table between 20 to 30 cm during winter and spring.
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i
Key Characteristics
- Soils formed in alluvium (flood plains and terraces).
- Occasional (greater than 5 to 50 time in 100 years) to frequent (greater than 50 time in 100 years) flooding occurs.
- Occurs on narrow flood plains adjacent to upland drainageways on toe slopes of mountains. Soils are well drained.
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i
Key Characteristics
- Soils formed in alluvium (flood plains and terraces).
- Occasional (greater than 5 to 50 time in 100 years) to frequent (greater than 50 time in 100 years) flooding occurs.
- Occurs on nearly level, broad flood plains. Soils are poorly or very poorly drained.
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i
Key Characteristics
- Soils formed in alluvium (flood plains and terraces).
- Rare (1 to 5 times in 100 years) and very brief flooding may occur (less than 48 hours).
- Occurs on terraces adjacent to major streams and rivers. Soils are moderately well to well drained.
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i
Key Characteristics
- Soils formed in residuum and/or colluvium (summits, backslopes, and foot slopes of dissected plateaus, hills, and mountains).
- Soils are moderately deep, deep, or very deep (greater than 50 cm depth).
- Clayey or fine (35 to 60 percent clay) in particle size control section.
- Soils have enough surface rock fragments to impede plant growth.
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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 119X ES Key
I.
Soils formed in alluvium (flood plains and terraces).
A.
Occasional (greater than 5 to 50 time in 100 years) to frequent (greater than 50 time in 100 years) flooding occurs.
1-
Occurs on narrow flood plains adjacent to upland drainageways on toe slopes of mountains. Soils are well drained.
... NX119X01Y012 – Drainageway
2-
Occurs on nearly level, broad flood plains. Soils are poorly or very poorly drained.
... NX119X01Y018 – Poorly Drained Flood Plain
B.
Rare (1 to 5 times in 100 years) and very brief flooding may occur (less than 48 hours).
1-
Occurs on terraces adjacent to major streams and rivers. Soils are moderately well to well drained.
... NX119X01Y019 – Rarely Flooded Terrace
II.
Soils formed in residuum and/or colluvium (summits, backslopes, and foot slopes of dissected plateaus, hills, and mountains).
A.
Soils are shallow or very shallow (Less than 50 cm depth), loamy or fine loamy (18 to 35 percent clay) in the particle size control section.
... NX119X01Y003 – Shallow Upland
B.
Soils are moderately deep, deep, or very deep (greater than 50 cm depth).
1-
Loamy or fine loamy (18 to 35 percent clay) in the particle size control section.
... NX119X01Y007 – Loamy Upland
2-
Clayey or fine (35 to 60 percent clay) in particle size control section.
i.
Soils are well drained. A perched water table occurs below 30 cm, if present.
... NX119X01Y006 – Clayey Upland
iii.
Soils are moderately well drained with a perched water table between 20 to 30 cm during winter and spring.
... NX119X01Y008 – Seasonally Wet Upland
iv.
Soils have enough surface rock fragments to impede plant growth.
... NX119X01Y025 – Novaculite Upland
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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.
