Natural Resources
Conservation Service
Major Land Resource Area 074X
Major Land Resource Area
Accessed: 04/24/2026
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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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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 south 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 south 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 south 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 south 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 south 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 south 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 south 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 south 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 south 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 south aspects
Ecological site map
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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.
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
Alluvial Soils (floodplains, terraces, and interdunes)
Eolian Sandy Soils (generally soils with >52% sand)
Hills (undulating to hilly uplands)
Soils that have a seasonal or perennial high water table (<6 feet from surface)
Soils that do not have a seasonal or perennial high-water table (>6 feet from surface)
Soils with a water table <6 feet … HX074XY132KS - Subirrigated
HX074XY132 – Subirrigated
HX074XY132 – Subirrigated
Soils with high concentration of salts EC > 4 ds/m in the profile … HX074XY120KS - Saline Lowland
HX074XY120 – Saline Lowland
HX074XY120 – Saline Lowland
Soils with >52% sand in the surface … HX074XY123KS - Sandy Floodplain
HX074XY123 – Sandy Floodplain
HX074XY123 – Sandy Floodplain
Surface texture is >40% clay within 12" … HX074XY104KS - Clay Lowland
HX074XY104 – Clay Lowland
HX074XY104 – Clay Lowland
Site occurs on stream terraces … HX074XY114KS - Loamy Terrace
HX074XY114 – Loamy Terrace
HX074XY114 – Loamy Terrace
All other soils with a water table >6 feet … HX074XY113KS - Loamy Floodplain
HX074XY113 – Loamy Floodplain
HX074XY113 – Loamy Floodplain
Soils with >52% sand in the surface … HX074XY122KS - Sand Plains
HX074XY122 – Sand Plains
HX074XY122 – Sand Plains
Soil depth <20 inches to sandstone … HX074XY130KS - Shallow Sandstone
HX074XY130 – Shallow Sandstone
HX074XY130 – Shallow Sandstone
Soils on uplands with clay content >45% at depths <14 inches … HX074XY107KS - Clay Hills
HX074XY107 – Clay Hills
HX074XY107 – Clay Hills
All other … HX074XY115KS - Loamy Hills
HX074XY115 – Loamy Hills
HX074XY115 – Loamy Hills
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
- 130 – 150days
- 150 – 170days
—
days
- No filter
- 200 – 400m (700 – 1300ft)
- 400 – 600m (1300 – 2000ft)
- 600 – 800m
—
m
- No filter
- 0 – 3%
- 3 – 5%
- 5 – 10%
- 10 – 15%
- 15 – 20%
- 20 – 25%
- 25 – 30%
- 30 – 35%
- 35 – 40%
—
%
- No filter
- Depression
- Drainageway
- Dune
- Flood plain
- Hillslope
- Interdune
- Stream terrace
- Terrace
- No filter
- Sandstone and shale
- Sandstone, unspecified
- Shale, unspecified
- No filter
- Alluvium
- Eolian deposits
- Loess
- Residuum
Soil surface texture
- No filter
- Fine sandy loam
- Loam
- Loamy fine sand
- Loamy sand
- Silty clay
- Silty clay loam
- Silt loam
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Ecological site keys
MLRA 74
I.
Alluvial Soils (floodplains, terraces, and interdunes)
A.
Soils that have a seasonal or perennial high water table (<6 feet from surface)
B.
Soils that do not have a seasonal or perennial high-water table (>6 feet from surface)
i.
Soils with high concentration of salts EC > 4 ds/m in the profile … HX074XY120KS - Saline Lowland
... HX074XY120 – Saline Lowland
ii.
Soils with >52% sand in the surface … HX074XY123KS - Sandy Floodplain
... HX074XY123 – Sandy Floodplain
iii.
Surface texture is >40% clay within 12" … HX074XY104KS - Clay Lowland
... HX074XY104 – Clay Lowland
v.
All other soils with a water table >6 feet … HX074XY113KS - Loamy Floodplain
... HX074XY113 – Loamy Floodplain
II.
Eolian Sandy Soils (generally soils with >52% sand)
III.
Hills (undulating to hilly uplands)
A.
Soil depth <20 inches to sandstone … HX074XY130KS - Shallow Sandstone
... HX074XY130 – Shallow Sandstone
B.
Soils on uplands with clay content >45% at depths <14 inches … HX074XY107KS - Clay Hills
... HX074XY107 – Clay Hills
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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