Major Land Resource Area 135B
Cretaceous Western Coastal Plain
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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i
Key Characteristics
- Site does not receive moisture from the surrounding landscape (uplands including summits, ridges, shoulders and side slopes of hills, mountains, and interfluves).
- Soil derived from parent material other than limestone.
- Slopes range from 1 to 60 percent and soils are moderately well to well drained.
- Greater than 35 percent rock fragments (loamy skeletal) in the particle size control section.
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i
Key Characteristics
- Site does not receive moisture from the surrounding landscape (uplands including summits, ridges, shoulders and side slopes of hills, mountains, and interfluves).
- Soil derived from parent material other than limestone.
- Slopes range from 0 to 3 percent and soils are somewhat poorly to poorly drained.
- Greater than 35 percent clay (fine or very fine) in the particle size control section.
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i
Key Characteristics
- Site does not receive moisture from the surrounding landscape (uplands including summits, ridges, shoulders and side slopes of hills, mountains, and interfluves).
- Soil derived from parent material other than limestone.
- Slopes range from 1 to 60 percent and soils are moderately well to well drained.
- Greater than 35 percent clay (fine or very fine) in the particle size control section and redoximorphic features below 2 feet (60 cm).
-
i
Key Characteristics
- Site does not receive moisture from the surrounding landscape (uplands including summits, ridges, shoulders and side slopes of hills, mountains, and interfluves).
- Soil derived from parent material other than limestone.
- Slopes range from 1 to 60 percent and soils are moderately well to well drained.
- 18 to 35 percent clay (fine-loamy or loamy) in the particle size control section.
-
i
Key Characteristics
- Site does not receive moisture from the surrounding landscape (uplands including summits, ridges, shoulders and side slopes of hills, mountains, and interfluves).
- Soil derived from limestone.
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i
Key Characteristics
- Site receives additional moisture from the surrounding landscape (floodplains and terraces) and soils formed in alluvium.
- Occurs on a terrace. Flooding is rare to none (1 to 5 times in 100 years).
- Soils are somewhat excessively to excessively drained with loamy fine sand or coarser in all horizons within the particle size control section.
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i
Key Characteristics
- Site receives additional moisture from the surrounding landscape (floodplains and terraces) and soils formed in alluvium.
- Occurs on a terrace. Flooding is rare to none (1 to 5 times in 100 years).
- Soils are moderately well to well drained with 18 to 35 percent clay in the particle size control section (fine-loamy, fine-silty).
-
i
Key Characteristics
- Site receives additional moisture from the surrounding landscape (floodplains and terraces) and soils formed in alluvium.
- Occurs on a terrace. Flooding is rare to none (1 to 5 times in 100 years).
- Soils are somewhat poorly or poorly drained, have greater than 18 percent clay in the particle size control section (coarse silty, coarse loamy, fine), and are characterized by wetness within 12 inches (30 cm) of the surface in winter and spring.
-
i
Key Characteristics
- Site receives additional moisture from the surrounding landscape (floodplains and terraces) and soils formed in alluvium.
- Occurs on a flood plain and are subject to occasional (greater than 5 to 50 times in 100 years) to frequent (greater than 50 times in 100 years) flooding of varying duration.
- Soils are somewhat poorly to poorly drained, characterized by wetness within 2 feet (60 cm) of the surface in the winter and spring, and have 35 to 60 percent clay in the particle size control section.
-
i
Key Characteristics
- Site receives additional moisture from the surrounding landscape (floodplains and terraces) and soils formed in alluvium.
- Occurs on a flood plain and are subject to occasional (greater than 5 to 50 times in 100 years) to frequent (greater than 50 times in 100 years) flooding of varying duration.
- Soils are moderately well to well drained, with redoximorphic features below 2 feet (30 cm), and have 18 to 35 percent clay in the particle size control section.
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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 135B Ecological Site Key
I.
Site receives additional moisture from the surrounding landscape (floodplains and terraces) and soils formed in alluvium.
A.
Occurs on a flood plain and are subject to occasional (greater than 5 to 50 times in 100 years) to frequent (greater than 50 times in 100 years) flooding of varying duration.
1-
Soils are somewhat poorly to poorly drained, characterized by wetness within 2 feet (60 cm) of the surface in the winter and spring, and have 35 to 60 percent clay in the particle size control section.
... PX135B01Y014 – Poorly Drained Flood Plain
2-
Soils are moderately well to well drained, with redoximorphic features below 2 feet (30 cm), and have 18 to 35 percent clay in the particle size control section.
... PX135B01Y015 – Well Drained Flood Plain
B.
Occurs on a terrace. Flooding is rare to none (1 to 5 times in 100 years).
1-
Soils are somewhat poorly or poorly drained, have greater than 18 percent clay in the particle size control section (coarse silty, coarse loamy, fine), and are characterized by wetness within 12 inches (30 cm) of the surface in winter and spring.
... PX135B01Y013 – Poorly Drained Terrace
2-
Soils are moderately well to well drained with 18 to 35 percent clay in the particle size control section (fine-loamy, fine-silty).
... PX135B01Y012 – Terrace
3-
Soils are somewhat excessively to excessively drained with loamy fine sand or coarser in all horizons within the particle size control section.
... PX135B01Y011 – Sandy Terrace
II.
Site does not receive moisture from the surrounding landscape (uplands including summits, ridges, shoulders and side slopes of hills, mountains, and interfluves).
B.
Soil derived from parent material other than limestone.
1-
Slopes range from 1 to 60 percent and soils are moderately well to well drained.
i.
18 to 35 percent clay (fine-loamy or loamy) in the particle size control section.
... PX135B01Y004 – Loamy Upland
ii.
Greater than 35 percent clay (fine or very fine) in the particle size control section and redoximorphic features below 2 feet (60 cm).
... PX135B01Y002 – Clayey Upland
iii.
Greater than 35 percent rock fragments (loamy skeletal) in the particle size control section.
... PX135B01X006 – Droughty Upland
2-
Slopes range from 0 to 3 percent and soils are somewhat poorly to poorly drained.
i.
Greater than 35 percent clay (fine or very fine) in the particle size control section.
... PX135B01Y001 – Poorly Drained Clayey 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.
