Natural Resources
Conservation Service
Major Land Resource Area 081A
Major Land Resource Area
Accessed: 05/13/2026
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1
Select an ecological site group
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2
Explore the ecological site group description
Next, learn more about the selected ecological site group and its characteristic dynamics by browsing the ecological site group description and exploring alternative state and transition model formats.
Ecological site group list
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Viewing 12 of 12
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i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying high elevation stratovolcano slopes
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying high elevation stratovolcano slopes
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying high elevation stratovolcano slopes
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying high elevation stratovolcano slopes
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying high elevation stratovolcano slopes
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying high elevation stratovolcano slopes
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying high elevation stratovolcano slopes
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying high elevation stratovolcano slopes
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying high elevation stratovolcano slopes
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying high elevation stratovolcano slopes
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying high elevation stratovolcano slopes
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying high elevation stratovolcano slopes
Briefcase
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Ecological site groups
Major Land Resource Areas
Ecological site group photos
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Interactive key
Additional water
Uplands
Perennial water
081AESG08 – Riparian
081AESG08 – Riparian
Ephemeral water
081AESG01 – Bottoms
081AESG01 – Bottoms
>75% bedrock outcrop
081AESG07 – Outcrops
081AESG07 – Outcrops
<75% bedrock outcrop
Surface SAR >8
081AESG09 – Saline Hills
081AESG09 – Saline Hills
Surface SAR <8
Gypsum >5% surface or >10% subsurface
081AESG05 – Gypsum
081AESG05 – Gypsum
Gypsum <5% surface and <10% subsurface
Subsurface EC >8 or surface EC >4
081AESG09 – Saline Hills
081AESG09 – Saline Hills
Subsurface EC <8 and surface EC <4
EC >1.5 surface or >2 subsurface
081AESG10 – Saline Uplands
081AESG10 – Saline Uplands
EC <1.5 surface and <2 subsurface
Depth <30cm
081AESG12 – Very Shallow
081AESG12 – Very Shallow
Depth: 30-55cm
081AESG11 – Shallow
081AESG11 – Shallow
Depth >55cm
Rock >30% surface or >30% subsurface
081AESG03 – Deep Rocky
081AESG03 – Deep Rocky
Rock <30% surface and <30% subsurface
Clay >30% surface or >35% subsurface
081AESG02 – Clay Uplands
081AESG02 – Clay Uplands
Clay <30% surface and <35% subsurface
Clay <20% or texture is Sandy Loam or sandier in surface
081AESG06 – Loamy Uplands
081AESG06 – Loamy Uplands
Clay >20% and texture is finer than Sandy Loam in surface
081AESG04 – Finer Uplands
081AESG04 – Finer Uplands
Additional water
Uplands
Perennial water - 041XESG09 Riparian
Ephemeral water - 040XESG01 Bottoms
Surface SAR >8 - 041XESG62 Thornscrub Saline Hills
Surface SAR <8
Gypsum >5% surface or >10% subsurface
Gypsum <5% surface and <10% subsurface
Elevation - <2500 ft - 083BESG54 Gypsum Desert
Elevation - 2500-3700 ft - 042AESG33 Gypsum Thornscrub
Elevation - 3700-4500 ft - 042BESG55 Gypsum Semi-Desert Grassland
Subsurface EC >8 or surface EC >4 - 041XESG62 Thornscrub Saline Hills
Subsurface EC <8 and surface EC <4
EC >1.5 surface or >2 subsurface
EC <1.5 surface and <2 subsurface
Elevation - <2500 ft - 040XESG58 Desert Saline Uplands
Elevation - 2500-3700 ft - 041XESG39 Thornscrub Saline Uplands
Depth <30cm
Depth: 30-55cm
Depth >55cm
Elevation - <2500 ft - 040XESG61 Very Shallow Desert
Elevation - 2500-3700 ft - 040XESG46 Very Shallow Thornscrub
Elevation - <2500 ft - 040XESG60 Shallow Desert
Elevation - 2500-3700 ft - 040XESG42 Shallow Thornscrub
Rock >30% surface or >30% subsurface - 040XESG25 Deep Rocky Thornscrub
Rock <30% surface and <30% subsurface
Clay >30% surface or >35% subsurface
Clay <30% surface and <35% subsurface
Elevation - <2500 ft - 040XESG51 Desert Clay Uplands
Elevation - 2500-3700 ft - 040XESG21 Thornscrub Clay Uplands
Clay <20% or texture is sandy loam or sandier in surface - 040XESG56 Desert Loamy Uplands
Clay >20% or texture is finer than sandy loam in surface - 040XESG53 Desert Finer Uplands
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Ecological site group keys
MLRA 81A
I.
Additional water
II.
Uplands
B.
<75% bedrock outcrop
2
Surface SAR <8
ii.
Gypsum <5% surface and <10% subsurface
b.
Subsurface EC <8 and surface EC <4
2)
EC <1.5 surface and <2 subsurface
c)
Depth >55cm
(2)
Rock <30% surface and <30% subsurface
(b)
Clay <30% surface and <35% subsurface
National Park Service
I.
Additional water
A.
Perennial water - 041XESG09 Riparian
B.
Ephemeral water - 040XESG01 Bottoms
II.
Uplands
A.
Surface SAR >8 - 041XESG62 Thornscrub Saline Hills
B.
Surface SAR <8
1
Gypsum >5% surface or >10% subsurface
i.
Elevation - <2500 ft - 083BESG54 Gypsum Desert
ii.
Elevation - 2500-3700 ft - 042AESG33 Gypsum Thornscrub
iii.
Elevation - 3700-4500 ft - 042BESG55 Gypsum Semi-Desert Grassland
2
Gypsum <5% surface and <10% subsurface
i.
Subsurface EC >8 or surface EC >4 - 041XESG62 Thornscrub Saline Hills
ii.
Subsurface EC <8 and surface EC <4
a.
EC >1.5 surface or >2 subsurface
1)
Elevation - <2500 ft - 040XESG58 Desert Saline Uplands
2)
Elevation - 2500-3700 ft - 041XESG39 Thornscrub Saline Uplands
b.
EC <1.5 surface and <2 subsurface
1)
Depth <30cm
a)
Elevation - <2500 ft - 040XESG61 Very Shallow Desert
b)
Elevation - 2500-3700 ft - 040XESG46 Very Shallow Thornscrub
2)
Depth: 30-55cm
a)
Elevation - <2500 ft - 040XESG60 Shallow Desert
b)
Elevation - 2500-3700 ft - 040XESG42 Shallow Thornscrub
3)
Depth >55cm
a)
Rock >30% surface or >30% subsurface - 040XESG25 Deep Rocky Thornscrub
b)
Rock <30% surface and <30% subsurface
(1)
Clay >30% surface or >35% subsurface
(a)
Elevation - <2500 ft - 040XESG51 Desert Clay Uplands
(b)
Elevation - 2500-3700 ft - 040XESG21 Thornscrub Clay Uplands
(2)
Clay <30% surface and <35% subsurface
(a)
Clay <20% or texture is sandy loam or sandier in surface - 040XESG56 Desert Loamy Uplands
(b)
Clay >20% or texture is finer than sandy loam in surface - 040XESG53 Desert Finer Uplands
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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