Natural Resources
Conservation Service
Major Land Resource Area 079X
Major Land Resource Area
Accessed: 04/21/2026
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 13 of 13
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 primarily on north or south aspects
- Site primarily found on moderate to steep north 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 primarily on north or south aspects
- Site primarily found on moderate to steep north 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 primarily on north or south aspects
- Site primarily found on moderate to steep north 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 primarily on north or south aspects
- Site primarily found on moderate to steep north 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 primarily on north or south aspects
- Site primarily found on moderate to steep north 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 primarily on north or south aspects
- Site primarily found on moderate to steep north 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 primarily on north or south aspects
- Site primarily found on moderate to steep north 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 primarily on north or south aspects
- Site primarily found on moderate to steep north 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 primarily on north or south aspects
- Site primarily found on moderate to steep north 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 primarily on north or south aspects
- Site primarily found on moderate to steep north 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 primarily on north or south aspects
- Site primarily found on moderate to steep north 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 primarily on north or south aspects
- Site primarily found on moderate to steep north 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 primarily on north or south aspects
- Site primarily found on moderate to steep north 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
Floodplains, Interdunes, and slight depressional areas
Sandy Soils (generally soils with >52% sand)
Plains and/or Uplands (smooth and level to gently undulating land)
Absorption Ratio
(lamella, if singular) are illuvial horizons less than 3 inches (7.5cm) thick and has more silicate clay within a sandier eluvial horizon.
Soils that have a seasonal or perennial high water table <2 feet from surface
Soils that have a seasonal or perennial high water table >2 feet and <6 feet from surface
Soils that do not have a seasonal or perennial high water table (<6 feet from surface)
Poorly drained soils with a water table <2’
R079XY133KS – Wet Subirrigated
R079XY133KS – Wet Subirrigated
Soils with a high concentration of salts SAR >13 at 7” from soil surface
R079XY120KS – Saline Subirrigated
R079XY120KS – Saline Subirrigated
All other somewhat poorly drained soils with a water table <6 feet
R079XY132KS – Subirrigated
R079XY132KS – Subirrigated
Soils with >70% sand in the surface
All other well drained soils on floodplains
R079XY113KS – Loamy Floodplain
R079XY113KS – Loamy Floodplain
Soils with >70% sand throughout the profile, >15% slope, short, steep, hummocky landform, no lamellae in the profile
R079XY103KS – Choppy Sands
R079XY103KS – Choppy Sands
Soils with >70% sand in the surface and clay increase from lamellae at 8” from soil surface
R079XY121KS – Sand Plains
R079XY121KS – Sand Plains
Soils with >52% sand in the surface, a clay increase, and Loamy subsurface texture
R079XY122KS – Sandy Loam
R079XY122KS – Sandy Loam
Shallow soils <20” to Permian red shale
R079XY180KS – Shallow Red Plains
R079XY180KS – Shallow Red Plains
Soils with visible salts >8” and SAR>13 at >4”
R079XY105KS – Sodic Plains
R079XY105KS – Sodic Plains
Soils >35% clay >10” from the surface
R079XY107KS – Clayey Plains
R079XY107KS – Clayey Plains
Soils calcareous to the surface
R079XY112KS – Limy Plains
R079XY112KS – Limy Plains
Moderately deep to deep, well drained upland soils
R079XY115KS – Loamy Plains
R079XY115KS – Loamy Plains
Long term average mean annual precipitation
- No filter
- 60 – 80cm (24 – 31in)
- 80 – 100cm (31 – 39in)
—
cm
Long term average frost free days
- No filter
- 150 – 170days
- 170 – 190days
—
days
- No filter
- 400 – 600m (1300 – 2000ft)
- 600 – 800m (2000 – 2600ft)
—
m
- No filter
- 0 – 3%
- 3 – 5%
- 5 – 10%
- 10 – 15%
- 15 – 20%
- 20 – 25%
- 25 – 30%
—
%
- No filter
- Depression
- Dune
- Flood plain
- Interdune
- Paleoterrace
- Pediment
- Terrace
- No filter
- Shale, unspecified
- No filter
- Alluvium
- Eolian deposits
- Eolian sands
- Residuum
Soil surface texture
- No filter
- Clay loam
- Fine sand
- Fine sandy loam
- Loam
- Loamy fine sand
- Loamy sand
- Sand
- Sandy clay loam
- Silty clay loam
- Silt loam
- Sandy loam
Print Options
Sections
Font
A
A
A
A
Other
Print
Ecological site keys
MLRA 79 Ecological Site Key
I.
Floodplains, Interdunes, and slight depressional areas
A.
Soils that have a seasonal or perennial high water table <2 feet from surface
B.
Soils that have a seasonal or perennial high water table >2 feet and <6 feet from surface
i.
Soils with a high concentration of salts SAR >13 at 7” from soil surface
... R079XY120KS – Saline Subirrigated
ii.
All other somewhat poorly drained soils with a water table <6 feet
... R079XY132KS – Subirrigated
C.
Soils that do not have a seasonal or perennial high water table (<6 feet from surface)
i.
Soils with >70% sand in the surface
II.
Sandy Soils (generally soils with >52% sand)
A.
Soils with >70% sand throughout the profile, >15% slope, short, steep, hummocky landform, no lamellae in the profile
... R079XY103KS – Choppy Sands
B.
Soils with >70% sand in the surface and clay increase from lamellae at 8” from soil surface
... R079XY121KS – Sand Plains
C.
Soils with >52% sand in the surface, a clay increase, and Loamy subsurface texture
... R079XY122KS – Sandy Loam
III.
Plains and/or Uplands (smooth and level to gently undulating land)
SAR=Sodium
Absorption Ratio
Lamellae
(lamella, if singular) are illuvial horizons less than 3 inches (7.5cm) thick and has more silicate clay within a sandier eluvial horizon.
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