Natural Resources
Conservation Service
Major Land Resource Area 077D
Major Land Resource Area
Accessed: 04/16/2026
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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
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precipitation
frost free days
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Viewing 10 of 10
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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
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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
Soils are calcareous
R077DY039TX – Draw 12-17" PZ
R077DY039TX – Draw 12-17" PZ
Soils are NOT calcareous
R077DY041TX – Lakebed 12-17" PZ
R077DY041TX – Lakebed 12-17" PZ
Soils are very shallow to shallow (8-20”(20-50cm) to root restricting layer
Soil depth moderately deep to very deep (>20” (50cm)) without root restricting layer that inhibits the productivity potential
Soils gravelly and calcareous, slightly higher position on the landscape than Very Shallow site. Mollic colored soil control section
R077DY048TX – Shallow 12-17" PZ
R077DY048TX – Shallow 12-17" PZ
Soils gravelly and calcareous, slightly lower landscape position than Shallow site, Ochric soil control section
R077DY049TX – Very Shallow 12-17" PZ
R077DY049TX – Very Shallow 12-17" PZ
Soil are gypsic
R077DY591TX – Gyp 12-17" PZ
R077DY591TX – Gyp 12-17" PZ
Soils affected by chemistry
Soils NOT affected by chemistry
Soils moderately deep with a cemented petrocalcic below
R077DY038TX – Clay Loam 12-17" PZ
R077DY038TX – Clay Loam 12-17" PZ
Sandy loam soil texture
R077DY040TX – High Lime 12-17" PZ
R077DY040TX – High Lime 12-17" PZ
Loam and Fine sandy loam soil texture
R077DY042TX – Limy Upland 12-17" PZ
R077DY042TX – Limy Upland 12-17" PZ
Soil surface texture is loamy fine sand to fine sand up to 15% slopes
R077DY045TX – Sand Hills 12-17" PZ
R077DY045TX – Sand Hills 12-17" PZ
Soil surface texture is loamy fine sand with <5% slope
R077DY046TX – Sandy 12-17" PZ
R077DY046TX – Sandy 12-17" PZ
Soil surface texture is fine sandy loamy
R077DY047TX – Sandy Loam 12-17" PZ
R077DY047TX – Sandy Loam 12-17" PZ
Long term average mean annual precipitation
- No filter
—
cm
Long term average frost free days
- No filter
- 150 – 170days
—
days
- No filter
- 400 – 600m (1300 – 2000ft)
- 600 – 800m (2000 – 2600ft)
- 800 – 1000m (2600 – 3300ft)
- 1000 – 1200m (3300 – 3900ft)
- 1200 – 1400m (3900 – 4600ft)
- 1400 – 1600m (4600 – 5200ft)
- 1600 – 1800m (5200 – 5900ft)
—
m
- No filter
- 0 – 3%
- 3 – 5%
- 5 – 10%
- 10 – 15%
—
%
- No filter
- Basin floor
- Drainageway
- Draw
- Dune
- Interdune
- Plain
- Playa dune
- Playa floor
- Playa rim
- Playa slope
- Playa step
- Ridge
- No filter
- Igneous, metamorphic and sedimentary
- No filter
- Alluvium
- Eolian deposits
- Eolian sands
- Lacustrine deposits
Soil surface texture
- No filter
- Clay
- Clay loam
- Fine sand
- Fine sandy loam
- Loam
- Loamy fine sand
- Sandy clay loam
- Very fine sandy loam
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Ecological site keys
MLRA 77D ES Key
I.
Site that receives significant additional moisture from runoff of adjacent slopes or intermittent/perennial streams or a water table
II.
Site does NOT receive additional moisture from runoff
A.
Soils are very shallow to shallow (8-20”(20-50cm) to root restricting layer
1
Soils gravelly and calcareous, slightly higher position on the landscape than Very Shallow site. Mollic colored soil control section
... R077DY048TX – Shallow 12-17" PZ
2
Soils gravelly and calcareous, slightly lower landscape position than Shallow site, Ochric soil control section
... R077DY049TX – Very Shallow 12-17" PZ
B.
Soil depth moderately deep to very deep (>20” (50cm)) without root restricting layer that inhibits the productivity potential
1
Soils affected by chemistry
2
Soils NOT affected by chemistry
i.
Soil surface texture is loamy fine sand to fine sand up to 15% slopes
... R077DY045TX – Sand Hills 12-17" PZ
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.
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