Natural Resources
Conservation Service
Major Land Resource Area 080A
Major Land Resource Area
Accessed: 04/13/2026
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Select an ecological site
Select an ecological site using the list, keys, photos, briefcase, or quick search option located on this page. -
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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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frost free days
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Viewing 18 of 18
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i
Key Characteristics
- Resides north of Columbia River.
- Sites has less than 20% cover of trees over 13 feet in height.
- The site occurs on depressions, swales on flood plains or terraces.
- Soil are non-hydric and not saturated to the surface, but plants are water tolerant.
- Site elevation is approximately 6,000 to 7,600 feet; cryic temperature regime.
- Cryic temperature regime, elevations above 3,500 ft
- Site occurring on floodplains and low stream terraces
-
i
Key Characteristics
- Resides north of Columbia River.
- Sites has less than 20% cover of trees over 13 feet in height.
- The site occurs on depressions, swales on flood plains or terraces.
- Soil are non-hydric and not saturated to the surface, but plants are water tolerant.
- Site elevation is approximately 6,000 to 7,600 feet; cryic temperature regime.
- Cryic temperature regime, elevations above 3,500 ft
- Site occurring on floodplains and low stream terraces
-
i
Key Characteristics
- Resides north of Columbia River.
- Sites has less than 20% cover of trees over 13 feet in height.
- The site occurs on depressions, swales on flood plains or terraces.
- Soil are non-hydric and not saturated to the surface, but plants are water tolerant.
- Site elevation is approximately 6,000 to 7,600 feet; cryic temperature regime.
- Cryic temperature regime, elevations above 3,500 ft
- Site occurring on floodplains and low stream terraces
-
i
Key Characteristics
- Resides north of Columbia River.
- Sites has less than 20% cover of trees over 13 feet in height.
- The site occurs on depressions, swales on flood plains or terraces.
- Soil are non-hydric and not saturated to the surface, but plants are water tolerant.
- Site elevation is approximately 6,000 to 7,600 feet; cryic temperature regime.
- Cryic temperature regime, elevations above 3,500 ft
- Site occurring on floodplains and low stream terraces
-
i
Key Characteristics
- Resides north of Columbia River.
- Sites has less than 20% cover of trees over 13 feet in height.
- The site occurs on depressions, swales on flood plains or terraces.
- Soil are non-hydric and not saturated to the surface, but plants are water tolerant.
- Site elevation is approximately 6,000 to 7,600 feet; cryic temperature regime.
- Cryic temperature regime, elevations above 3,500 ft
- Site occurring on floodplains and low stream terraces
-
i
Key Characteristics
- Resides north of Columbia River.
- Sites has less than 20% cover of trees over 13 feet in height.
- The site occurs on depressions, swales on flood plains or terraces.
- Soil are non-hydric and not saturated to the surface, but plants are water tolerant.
- Site elevation is approximately 6,000 to 7,600 feet; cryic temperature regime.
- Cryic temperature regime, elevations above 3,500 ft
- Site occurring on floodplains and low stream terraces
-
i
Key Characteristics
- Resides north of Columbia River.
- Sites has less than 20% cover of trees over 13 feet in height.
- The site occurs on depressions, swales on flood plains or terraces.
- Soil are non-hydric and not saturated to the surface, but plants are water tolerant.
- Site elevation is approximately 6,000 to 7,600 feet; cryic temperature regime.
- Cryic temperature regime, elevations above 3,500 ft
- Site occurring on floodplains and low stream terraces
-
i
Key Characteristics
- Resides north of Columbia River.
- Sites has less than 20% cover of trees over 13 feet in height.
- The site occurs on depressions, swales on flood plains or terraces.
- Soil are non-hydric and not saturated to the surface, but plants are water tolerant.
- Site elevation is approximately 6,000 to 7,600 feet; cryic temperature regime.
- Cryic temperature regime, elevations above 3,500 ft
- Site occurring on floodplains and low stream terraces
-
i
Key Characteristics
- Resides north of Columbia River.
- Sites has less than 20% cover of trees over 13 feet in height.
- The site occurs on depressions, swales on flood plains or terraces.
- Soil are non-hydric and not saturated to the surface, but plants are water tolerant.
- Site elevation is approximately 6,000 to 7,600 feet; cryic temperature regime.
- Cryic temperature regime, elevations above 3,500 ft
- Site occurring on floodplains and low stream terraces
-
i
Key Characteristics
- Resides north of Columbia River.
- Sites has less than 20% cover of trees over 13 feet in height.
- The site occurs on depressions, swales on flood plains or terraces.
- Soil are non-hydric and not saturated to the surface, but plants are water tolerant.
- Site elevation is approximately 6,000 to 7,600 feet; cryic temperature regime.
- Cryic temperature regime, elevations above 3,500 ft
- Site occurring on floodplains and low stream terraces
-
i
Key Characteristics
- Resides north of Columbia River.
- Sites has less than 20% cover of trees over 13 feet in height.
- The site occurs on depressions, swales on flood plains or terraces.
- Soil are non-hydric and not saturated to the surface, but plants are water tolerant.
- Site elevation is approximately 6,000 to 7,600 feet; cryic temperature regime.
- Cryic temperature regime, elevations above 3,500 ft
- Site occurring on floodplains and low stream terraces
-
i
Key Characteristics
- Resides north of Columbia River.
- Sites has less than 20% cover of trees over 13 feet in height.
- The site occurs on depressions, swales on flood plains or terraces.
- Soil are non-hydric and not saturated to the surface, but plants are water tolerant.
- Site elevation is approximately 6,000 to 7,600 feet; cryic temperature regime.
- Cryic temperature regime, elevations above 3,500 ft
- Site occurring on floodplains and low stream terraces
-
i
Key Characteristics
- Resides north of Columbia River.
- Sites has less than 20% cover of trees over 13 feet in height.
- The site occurs on depressions, swales on flood plains or terraces.
- Soil are non-hydric and not saturated to the surface, but plants are water tolerant.
- Site elevation is approximately 6,000 to 7,600 feet; cryic temperature regime.
- Cryic temperature regime, elevations above 3,500 ft
- Site occurring on floodplains and low stream terraces
-
i
Key Characteristics
- Resides north of Columbia River.
- Sites has less than 20% cover of trees over 13 feet in height.
- The site occurs on depressions, swales on flood plains or terraces.
- Soil are non-hydric and not saturated to the surface, but plants are water tolerant.
- Site elevation is approximately 6,000 to 7,600 feet; cryic temperature regime.
- Cryic temperature regime, elevations above 3,500 ft
- Site occurring on floodplains and low stream terraces
-
i
Key Characteristics
- Resides north of Columbia River.
- Sites has less than 20% cover of trees over 13 feet in height.
- The site occurs on depressions, swales on flood plains or terraces.
- Soil are non-hydric and not saturated to the surface, but plants are water tolerant.
- Site elevation is approximately 6,000 to 7,600 feet; cryic temperature regime.
- Cryic temperature regime, elevations above 3,500 ft
- Site occurring on floodplains and low stream terraces
-
i
Key Characteristics
- Resides north of Columbia River.
- Sites has less than 20% cover of trees over 13 feet in height.
- The site occurs on depressions, swales on flood plains or terraces.
- Soil are non-hydric and not saturated to the surface, but plants are water tolerant.
- Site elevation is approximately 6,000 to 7,600 feet; cryic temperature regime.
- Cryic temperature regime, elevations above 3,500 ft
- Site occurring on floodplains and low stream terraces
-
i
Key Characteristics
- Resides north of Columbia River.
- Sites has less than 20% cover of trees over 13 feet in height.
- The site occurs on depressions, swales on flood plains or terraces.
- Soil are non-hydric and not saturated to the surface, but plants are water tolerant.
- Site elevation is approximately 6,000 to 7,600 feet; cryic temperature regime.
- Cryic temperature regime, elevations above 3,500 ft
- Site occurring on floodplains and low stream terraces
-
i
Key Characteristics
- Resides north of Columbia River.
- Sites has less than 20% cover of trees over 13 feet in height.
- The site occurs on depressions, swales on flood plains or terraces.
- Soil are non-hydric and not saturated to the surface, but plants are water tolerant.
- Site elevation is approximately 6,000 to 7,600 feet; cryic temperature regime.
- Cryic temperature regime, elevations above 3,500 ft
- Site occurring on floodplains and low stream terraces
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
Run on hydrology (floodplains, depressions)
Run off or neutral hydrology (uplands, terrace)
Closed depressions or interdunal depressions on sand sheets
Floodplain or floodplain step
Loam textures with redox within 30 inches
R080AY025OK – Depressional Upland
R080AY025OK – Depressional Upland
Sand textures with redox within 50 inches
R080AY094OK – Wet Sandy Upland
R080AY094OK – Wet Sandy Upland
Ponded with redox within 10 inches
R080AY090OK – Ponded Bottomland
R080AY090OK – Ponded Bottomland
Not ponded
Natric or salts are present
No salts present
Sodic with prismatic structure in the subsurface horizons with red colors (7YR) and a SAR greater than 13.
R080AY001OK – Alkali Bottomland
R080AY001OK – Alkali Bottomland
Saline with a Columnar structure in the subsurface horizons with a brown surface colors (10YR) and an EC greater than 4 mmohs/cm.
R080AY068OK – Sandy Bottomland
R080AY068OK – Sandy Bottomland
Sandy surface (greater than 4 inches (10 cm))
R080AY068OK – Sandy Bottomland
R080AY068OK – Sandy Bottomland
Loam or clay surface (greater than 4 inches (10 cm))
>35% clay throughout the upper soil profile (20 inches (50 cm))
R080AY045OK – Clay Bottomland
R080AY045OK – Clay Bottomland
>18% clay but <35% clay throughout the upper soil profile (20 inches (50 cm))
R080AY050OK – Loamy Bottomland
R080AY050OK – Loamy Bottomland
Less than 20 inches (50 cm) to a restrictive layer
Greater than 20 inches (50 cm) to a restrictive layer.
Clay or Clay loam over red shale (>35% clay)
R080AY080OK – Shallow Clay Upland
R080AY080OK – Shallow Clay Upland
Loam or Sandy Loam over sandstone (clay >18% but <35%)
R080AY083OK – Shallow Upland
R080AY083OK – Shallow Upland
Surface salts and crusting visible.
R080AY091OK – Slickspot
R080AY091OK – Slickspot
No surface salts and crusting visible.
Loam surface (loam, silty loam, clay loam, fine sandy loam)
Sandy surface (sand, fine sand, loamy fine sand).
Abrupt texture change (increase in clay) within 30 inches of surface.
No abrupt texture change.
Mean annual air temperature >60 degrees
R080AY011OK – Claypan Upland (South)
R080AY011OK – Claypan Upland (South)
Mean annual air temperature <60 degrees
R080AY010OK – Claypan Upland (North)
R080AY010OK – Claypan Upland (North)
Sandy loam or sandy clay loam subsoils
R080AY073OK – Sandy Loam Upland
R080AY073OK – Sandy Loam Upland
Loam or clay loam subsoils
R080AY056OK – Loamy Upland
R080AY056OK – Loamy Upland
Dunes or hummocks with no argillic horizon (sand over sand) (clay <10%, sand >70%)
R080AY022OK – Dune
R080AY022OK – Dune
Low dunes or hummocks with argillic (Lamellae).
R080AY014OK – Deep Sand
R080AY014OK – Deep Sand
Long term average mean annual precipitation
- No filter
- 80 – 100cm (31 – 39in)
—
cm
Long term average frost free days
- No filter
- 170 – 190days
- 190 – 210days
—
days
- No filter
- 0 – 200m (0 – 700ft)
- 200 – 400m (700 – 1300ft)
- 400 – 600m (1300 – 2000ft)
- 600 – 800m (2000 – 2600ft)
—
m
- No filter
- 0 – 3%
- 3 – 5%
- 5 – 10%
- 10 – 15%
- 15 – 20%
- 20 – 25%
—
%
- No filter
- Backswamp
- Depression
- Dune
- Flood plain
- Hill
- Hillslope
- Interdune
- Interfluve
- Paleoterrace
- Sand sheet
- Terrace
- No filter
- Sandstone and shale
- Sandstone, unspecified
- Shale, clayey
- No filter
- Alluvium
- Eolian deposits
- Eolian sands
- Residuum
Soil surface texture
- No filter
- Clay
- Clay loam
- Fine sand
- Fine sandy loam
- Loam
- Loamy fine sand
- Sandy clay
- Silty clay
- Silty clay loam
- Silt loam
- Sandy loam
- Very fine sandy loam
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Ecological site keys
MLRA 80A Dichotomous Key
I.
Run on hydrology (floodplains, depressions)
A.
Closed depressions or interdunal depressions on sand sheets
B.
Floodplain or floodplain step
2
Not ponded
i.
Natric or salts are present
a.
Sodic with prismatic structure in the subsurface horizons with red colors (7YR) and a SAR greater than 13.
... R080AY001OK – Alkali Bottomland
b.
Saline with a Columnar structure in the subsurface horizons with a brown surface colors (10YR) and an EC greater than 4 mmohs/cm.
... R080AY068OK – Sandy Bottomland
ii.
No salts present
b.
Loam or clay surface (greater than 4 inches (10 cm))
1)
>35% clay throughout the upper soil profile (20 inches (50 cm))
... R080AY045OK – Clay Bottomland
2)
>18% clay but <35% clay throughout the upper soil profile (20 inches (50 cm))
... R080AY050OK – Loamy Bottomland
II.
Run off or neutral hydrology (uplands, terrace)
A.
Less than 20 inches (50 cm) to a restrictive layer
B.
Greater than 20 inches (50 cm) to a restrictive layer.
2
No surface salts and crusting visible.
i.
Loam surface (loam, silty loam, clay loam, fine sandy loam)
a.
Abrupt texture change (increase in clay) within 30 inches of surface.
b.
No abrupt texture change.
ii.
Sandy surface (sand, fine sand, loamy fine sand).
a.
Dunes or hummocks with no argillic horizon (sand over sand) (clay <10%, sand >70%)
... R080AY022OK – Dune
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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