Major Land Resource Area 077B
Southern High Plains, Northwestern Part
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 additional moisture from runoff
- Soils are very shallow (<10”(25cm) to root restricting layer
- Soil NOT highly calcareous (>15% CCE within top 20”(50cm))
- Soil depth shallow to sandstone bedrock(10-20” (25-50cm)) OR moderately deep to deep (>20” (>50cm), skeletal (>35% coarse fragments by volume in top 20” (50cm”))
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i
Key Characteristics
- Site that receives significant additional moisture from runoff of adjacent slopes or intermittent/perennial streams or a water table
- Site not saline
- Site not as above
- Soil Loamy at surface, 18-35% clay in the top 10”(25cm)
- Loamy soils without additional summer monsoonal moisture, elevation approximately 4000 feet or more
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i
Key Characteristics
- Site does NOT receive additional moisture from runoff
- Soil depth moderately deep to deep (>20” (50cm)) without root restricting layer that inhibits the productivity potential
- Soils affected by chemistry
- Soils highly calcareous (>15% CCE) violent effervescence
- High lime content soils without additional summer monsoonal moisture, elevation approximately 4000 feet or more, site commonly occurs on the leeward side of playa lakes and sideslopes of draws
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i
Key Characteristics
- Site does NOT receive additional moisture from runoff
- Soil depth moderately deep to deep (>20” (50cm)) without root restricting layer that inhibits the productivity potential
- Soils NOT affected by chemistry
- Soils are loamy texture
- Loamy site below about 4000 feet elevation
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i
Key Characteristics
- Site does NOT receive additional moisture from runoff
- Soils are very shallow (<10”(25cm) to root restricting layer
- Soil NOT highly calcareous (>15% CCE within top 20”(50cm))
- Soils very shallow(<10” (25cm)), but may include areas of exposed bedrock and pockets of deep soil
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i
Key Characteristics
- Site does NOT receive additional moisture from runoff
- Soil depth moderately deep to deep (>20” (50cm)) without root restricting layer that inhibits the productivity potential
- Soils affected by chemistry
- Soils highly calcareous (>15% CCE) violent effervescence
- High lime content soils with additional summer monsoonal moisture, elevation approximately 4000 feet or less
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i
Key Characteristics
- Site does NOT receive additional moisture from runoff
- Soil depth moderately deep to deep (>20” (50cm)) without root restricting layer that inhibits the productivity potential
- Soils affected by chemistry
- Site moderately to strongly saline (>8mmhos/cm) within 20” (50cm) and dominated by salt tolerant species
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i
Key Characteristics
- Site does NOT receive additional moisture from runoff
- Soil depth moderately deep to deep (>20” (50cm)) without root restricting layer that inhibits the productivity potential
- Soils NOT affected by chemistry
- Soils are sandy texture at the surface
- Deep sandy soils, elevation approximately 4500 feet or less, site has significant additional summer monsoonal moisture from convection storms
- Fine Sand
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i
Key Characteristics
- Site does NOT receive additional moisture from runoff
- Soil depth moderately deep to deep (>20” (50cm)) without root restricting layer that inhibits the productivity potential
- Soils NOT affected by chemistry
- Soils are sandy texture at the surface
- Deep sandy soils, elevation approximately 4500 feet or less, site has significant additional summer monsoonal moisture from convection storms
- Sandy Loam
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i
Key Characteristics
- Site does NOT receive additional moisture from runoff
- Soil depth moderately deep to deep (>20” (50cm)) without root restricting layer that inhibits the productivity potential
- Soils affected by chemistry
- Soils highly calcareous (>15% CCE) violent effervescence
- Sandy soils with Calcic horizon at 20 inches
-
i
Key Characteristics
- Site does NOT receive additional moisture from runoff
- Soils are very shallow (<10”(25cm) to root restricting layer
- Soils highly calcareous (>15% CCE within top 20” (50cm))
- Soil depth shallow (10-20” (25-50cm)) OR moderately deep to deep (>20” (>50cm), skeletal (>35% coarse fragments by volume in top 20” (50cm”))
-
i
Key Characteristics
- Site does NOT receive additional moisture from runoff
- Soil depth moderately deep to deep (>20” (50cm)) without root restricting layer that inhibits the productivity potential
- Soils NOT affected by chemistry
- Soils are loamy texture
- Loamy site above about 4000 feet elevation
-
i
Key Characteristics
- Site does NOT receive additional moisture from runoff
- Soil depth moderately deep to deep (>20” (50cm)) without root restricting layer that inhibits the productivity potential
- Soils affected by chemistry
- Soils highly calcareous (>15% CCE) violent effervescence
- Loamy site with Calcic horizon at 20 inches
-
i
Key Characteristics
- Site does NOT receive additional moisture from runoff
- Soil depth moderately deep to deep (>20” (50cm)) without root restricting layer that inhibits the productivity potential
- Soils NOT affected by chemistry
- Soils are sandy texture at the surface
- Deep sandy soils, elevation approximately 4500 feet or more, site does not have significant additional summer monsoonal moisture from convection
-
i
Key Characteristics
- Site does NOT receive additional moisture from runoff
- Soil depth moderately deep to deep (>20” (50cm)) without root restricting layer that inhibits the productivity potential
- Soils NOT affected by chemistry
- Soils are sandy texture at the surface
- Deep sandy soils, elevation approximately 4500 feet or less, site has significant additional summer monsoonal moisture from convection storms
- loamy fine sand
-
i
Key Characteristics
- Site that receives significant additional moisture from runoff of adjacent slopes or intermittent/perennial streams or a water table
- Site not saline
- Site not as above
- Soil Sandy at surface, <18% clay in the top 10”(25cm)
-
i
Key Characteristics
- Site does NOT receive additional moisture from runoff
- Soil depth moderately deep to deep (>20” (50cm)) without root restricting layer that inhibits the productivity potential
- Soils affected by chemistry
- Soils highly calcareous (>15% CCE) violent effervescence
- High lime content soils with additional summer monsoonal moisture, elevation approximately 4000 feet or less, site commonly occurs on the leeward side of playa lakes and sideslope of draws
-
i
Key Characteristics
- Site that receives significant additional moisture from runoff of adjacent slopes or intermittent/perennial streams or a water table
- Site not saline
- Site not as above
- Soil Loamy at surface, 18-35% clay in the top 10”(25cm)
- Loamy soils with additional summer monsoonal moisture, elevation approximately 4000 feet or less
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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 77B ES Key
I.
Site that receives significant additional moisture from runoff of adjacent slopes or intermittent/perennial streams or a water table
A.
Site moderately to strongly saline (>8mmhos/cm) within 20” (50cm) and dominated by salt tolerant species
... R077BY058NM – Saline
B.
Site not saline
1
Loamy soils with fluctuating water table 1 to 4 feet below the surface for most of the growing season
... R077BY008NM – Meadows
2
Site not as above
i.
Soil Sandy at surface, <18% clay in the top 10”(25cm)
... R077BY700TX – Sandy Bottomland 12-17" PZ
ii.
Soil Loamy at surface, 18-35% clay in the top 10”(25cm)
a.
Loamy soils with additional summer monsoonal moisture, elevation approximately 4000 feet or less
... R077BY725TX – Draw 12-17" PZ
b.
Loamy soils without additional summer monsoonal moisture, elevation approximately 4000 feet or more
... R077BY007NM – Swales
II.
Site does NOT receive additional moisture from runoff
A.
Soils are very shallow (<10”(25cm) to root restricting layer
1
Soils highly calcareous (>15% CCE within top 20” (50cm))
i.
Soil depth shallow (10-20” (25-50cm)) OR moderately deep to deep (>20” (>50cm), skeletal (>35% coarse fragments by volume in top 20” (50cm”))
... R077BY031NM – Shallow
2
Soil NOT highly calcareous (>15% CCE within top 20”(50cm))
i.
Soils very shallow(<10” (25cm)), but may include areas of exposed bedrock and pockets of deep soil
... R077BY016NM – Very Shallow
ii.
Soil depth shallow to sandstone bedrock(10-20” (25-50cm)) OR moderately deep to deep (>20” (>50cm), skeletal (>35% coarse fragments by volume in top 20” (50cm”))
... R077BY005NM – Shallow Sandstone
B.
Soil depth moderately deep to deep (>20” (50cm)) without root restricting layer that inhibits the productivity potential
1
Soils affected by chemistry
i.
Site moderately to strongly saline (>8mmhos/cm) within 20” (50cm) and dominated by salt tolerant species
... R077BY019NM – Salt Flats
ii.
Soils highly calcareous (>15% CCE) violent effervescence
a.
High lime content soils with additional summer monsoonal moisture, elevation approximately 4000 feet or less
... R077BY016TX – Limy Upland 12-17" PZ
b.
High lime content soils without additional summer monsoonal moisture, elevation approximately 4000 feet or more, site commonly occurs on the leeward side of playa lakes and sideslopes of draws
... R077BY011NM – High Lime
c.
High lime content soils with additional summer monsoonal moisture, elevation approximately 4000 feet or less, site commonly occurs on the leeward side of playa lakes and sideslope of draws
... R077BY722TX – High Lime 12-17" PZ
2
Soils NOT affected by chemistry
i.
Soils are loamy texture
ii.
Soils are sandy texture at the surface
a.
Deep sandy soils, elevation approximately 4500 feet or more, site does not have significant additional summer monsoonal moisture from convection
... R077BY035NM – High Sandy Loam
b.
Deep sandy soils, elevation approximately 4500 feet or less, site has significant additional summer monsoonal moisture from convection storms
Ecological site photos
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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.
