Natural Resources
Conservation Service
Major Land Resource Area 077B
Major Land Resource Area
Accessed: 04/16/2026
Previous
Sections
Next
Next steps
-
1
Select an ecological site
Select an ecological site using the list, keys, photos, briefcase, or quick search option located on this page. -
2
Explore the ecological site description
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.
Ecological site list
Tools
Search
Filter by
interactive key
precipitation
frost free days
more..
clear all
Sort by
id
name
stage
Viewing 20 of 20
View all
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Not as above
- Site found on all aspects
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Not as above
- Site found on all aspects
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Not as above
- Site found on all aspects
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Not as above
- Site found on all aspects
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Not as above
- Site found on all aspects
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Not as above
- Site found on all aspects
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Not as above
- Site found on all aspects
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Not as above
- Site found on all aspects
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Not as above
- Site found on all aspects
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Not as above
- Site found on all aspects
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Not as above
- Site found on all aspects
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Not as above
- Site found on all aspects
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Not as above
- Site found on all aspects
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Not as above
- Site found on all aspects
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Not as above
- Site found on all aspects
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Not as above
- Site found on all aspects
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Not as above
- Site found on all aspects
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Not as above
- Site found on all aspects
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Not as above
- Site found on all aspects
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Not as above
- Site found on all aspects
Ecological site map
Basemap
Topo
Road
Aerial
Hybrid
Find me
Find point
Full screen
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.
Briefcase
Add ecological sites and Major Land Resource Areas to your briefcase by clicking on the briefcase (
) icon wherever it occurs. Drag and drop items to reorder. Cookies are used to store briefcase items between browsing sessions. Because of this, the number of items that can be added to your briefcase is limited, and briefcase items added on one device and browser cannot be accessed from another device or browser. Users who do not wish to place cookies on their devices should not use the briefcase tool. Briefcase cookies serve no other purpose than described here and are deleted whenever browsing history is cleared.
Ecological sites
Major Land Resource Areas
Ecological site photos
Tools
Filter by
interactive key
precipitation
frost free days
more..
clear all
Type
Image size
Done
Filters
Interactive key
Precipitation
Frost free days
Elevation
Slope
Landform
Parent material origin
Parent material kind
Soil texture
Site that receives significant additional moisture from runoff of adjacent slopes or intermittent/perennial streams or a water table
Site does NOT receive additional moisture from runoff
Site moderately to strongly saline (>8mmhos/cm) within 20” (50cm) and dominated by salt tolerant species
R077BY058NM – Saline
R077BY058NM – Saline
Site not saline
Loamy soils with fluctuating water table 1 to 4 feet below the surface for most of the growing season
R077BY008NM – Meadows
R077BY008NM – Meadows
Site not as above
Soil Sandy at surface, <18% clay in the top 10”(25cm)
R077BY700TX – Sandy Bottomland 12-17" PZ
R077BY700TX – Sandy Bottomland 12-17" PZ
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
R077BY725TX – Draw 12-17" PZ
R077BY725TX – Draw 12-17" PZ
Loamy soils without additional summer monsoonal moisture, elevation approximately 4000 feet or more
R077BY007NM – Swales
R077BY007NM – Swales
Soils are very shallow (<10”(25cm) to root restricting layer
Soil depth moderately deep to deep (>20” (50cm)) without root restricting layer that inhibits the productivity potential
Soils highly calcareous (>15% CCE within top 20” (50cm))
Soil NOT 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”))
R077BY031NM – Shallow
R077BY031NM – Shallow
Soils very shallow(<10” (25cm)), but may include areas of exposed bedrock and pockets of deep soil
R077BY016NM – Very Shallow
R077BY016NM – Very Shallow
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
R077BY005NM – Shallow Sandstone
Soils affected by chemistry
Soils NOT affected by chemistry
Site moderately to strongly saline (>8mmhos/cm) within 20” (50cm) and dominated by salt tolerant species
R077BY019NM – Salt Flats
R077BY019NM – Salt Flats
Soils highly calcareous (>15% CCE) violent effervescence
High lime content soils with additional summer monsoonal moisture, elevation approximately 4000 feet or less
R077BY016TX – Limy Upland 12-17" PZ
R077BY016TX – Limy Upland 12-17" PZ
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
R077BY011NM – High Lime
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
R077BY722TX – High Lime 12-17" PZ
Loamy site with Calcic horizon at 20 inches
R077BY034NM – Deep Loamy Plains
R077BY034NM – Deep Loamy Plains
Sandy soils with Calcic horizon at 20 inches
R077BY028NM – Sandy Plains
R077BY028NM – Sandy Plains
Soils are loamy texture
Soils are sandy texture at the surface
Loamy site above about 4000 feet elevation
R077BY033NM – Loamy
R077BY033NM – Loamy
Loamy site below about 4000 feet elevation
R077BY014TX – Deep Hardland 12-17" PZ
R077BY014TX – Deep Hardland 12-17" PZ
Deep sandy soils, elevation approximately 4500 feet or more, site does not have significant additional summer monsoonal moisture from convection
R077BY035NM – High Sandy Loam
R077BY035NM – High Sandy Loam
Deep sandy soils, elevation approximately 4500 feet or less, site has significant additional summer monsoonal moisture from convection storms
loamy fine sand
R077BY658TX – Sandy 12-17" PZ
R077BY658TX – Sandy 12-17" PZ
Fine Sand
R077BY020TX – Sand Hills 12-17" PZ
R077BY020TX – Sand Hills 12-17" PZ
Sandy Loam
R077BY021TX – Sandy Loam 12-17" PZ
R077BY021TX – Sandy Loam 12-17" PZ
Long term average mean annual precipitation
- No filter
- 40 – 50cm (16 – 20in)
—
cm
Long term average frost free days
- No filter
- 130 – 150days
- 150 – 170days
- 170 – 190days
- 190 – 210days
—
days
- No filter
- 600 – 800m (2000 – 2600ft)
- 800 – 1000m (2600 – 3300ft)
- 1000 – 1200m (3300 – 3900ft)
- 1200 – 1400m (3900 – 4600ft)
- 1400 – 1600m (4600 – 5200ft)
- 1600 – 1800m (5200 – 5900ft)
- 1800 – 2000m (5900 – 6600ft)
- 2000 – 2200m (6600 – 7200ft)
- 2200 – 2400m (7200 – 7900ft)
—
m
- No filter
- 0 – 3%
- 3 – 5%
- 5 – 10%
- 10 – 15%
- 15 – 20%
- 20 – 25%
—
%
- No filter
- Alluvial fan
- Alluvial flat
- Drainageway
- Draw
- Dune
- Ephemeral stream
- Headwall
- Hill
- Hillslope
- Interdune
- Mesa
- Plain
- Playa
- Playa dune
- Playa floor
- Ridge
- Sand sheet
- Terrace
- No filter
- Igneous, metamorphic and sedimentary
- No filter
- Alluvium
- Eolian deposits
- Lacustrine deposits
Soil surface texture
- No filter
- Clay loam
- Fine sand
- Fine sandy loam
- Loam
- Loamy fine sand
- Loamy sand
- Sandy clay loam
- Silty clay loam
- Sandy loam
Print Options
Sections
Font
A
A
A
A
Other
Print
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
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.
Accessibility statement