Natural Resources
Conservation Service
Major Land Resource Area 001X
Major Land Resource Area
Accessed: 04/20/2026
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1
Select an ecological site group
Select an ecological site group using the list, keys, photos, briefcase, or quick search option located on this page. -
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.
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Viewing 12 of 12
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i
Key Characteristics
- Site resides in north of the Columbia River
- Mesic areas in or near the Puget Sound that were modified by Pleistocene continental or alpine glaciation - LRU A Puget Lowlands
- Area is located in San Juan or Island Counties
- Area with soils that do not meet hydric criteria
- Forested areas
- Soils that are dry between 60 and 90 consecutive days in the soil moisture control section
- Between 75 and 90 days dry in the soil moisture control section
-
i
Key Characteristics
- Site resides in north of the Columbia River
- Mesic areas in or near the Puget Sound that were modified by Pleistocene continental or alpine glaciation - LRU A Puget Lowlands
- Area is located in San Juan or Island Counties
- Area with soils that do not meet hydric criteria
- Forested areas
- Soils that are dry between 60 and 90 consecutive days in the soil moisture control section
- Between 75 and 90 days dry in the soil moisture control section
-
i
Key Characteristics
- Site resides in north of the Columbia River
- Mesic areas in or near the Puget Sound that were modified by Pleistocene continental or alpine glaciation - LRU A Puget Lowlands
- Area is located in San Juan or Island Counties
- Area with soils that do not meet hydric criteria
- Forested areas
- Soils that are dry between 60 and 90 consecutive days in the soil moisture control section
- Between 75 and 90 days dry in the soil moisture control section
-
i
Key Characteristics
- Site resides in north of the Columbia River
- Mesic areas in or near the Puget Sound that were modified by Pleistocene continental or alpine glaciation - LRU A Puget Lowlands
- Area is located in San Juan or Island Counties
- Area with soils that do not meet hydric criteria
- Forested areas
- Soils that are dry between 60 and 90 consecutive days in the soil moisture control section
- Between 75 and 90 days dry in the soil moisture control section
-
i
Key Characteristics
- Site resides in north of the Columbia River
- Mesic areas in or near the Puget Sound that were modified by Pleistocene continental or alpine glaciation - LRU A Puget Lowlands
- Area is located in San Juan or Island Counties
- Area with soils that do not meet hydric criteria
- Forested areas
- Soils that are dry between 60 and 90 consecutive days in the soil moisture control section
- Between 75 and 90 days dry in the soil moisture control section
-
i
Key Characteristics
- Site resides in north of the Columbia River
- Mesic areas in or near the Puget Sound that were modified by Pleistocene continental or alpine glaciation - LRU A Puget Lowlands
- Area is located in San Juan or Island Counties
- Area with soils that do not meet hydric criteria
- Forested areas
- Soils that are dry between 60 and 90 consecutive days in the soil moisture control section
- Between 75 and 90 days dry in the soil moisture control section
-
i
Key Characteristics
- Site resides in north of the Columbia River
- Mesic areas in or near the Puget Sound that were modified by Pleistocene continental or alpine glaciation - LRU A Puget Lowlands
- Area is located in San Juan or Island Counties
- Area with soils that do not meet hydric criteria
- Forested areas
- Soils that are dry between 60 and 90 consecutive days in the soil moisture control section
- Between 75 and 90 days dry in the soil moisture control section
-
i
Key Characteristics
- Site resides in north of the Columbia River
- Mesic areas in or near the Puget Sound that were modified by Pleistocene continental or alpine glaciation - LRU A Puget Lowlands
- Area is located in San Juan or Island Counties
- Area with soils that do not meet hydric criteria
- Forested areas
- Soils that are dry between 60 and 90 consecutive days in the soil moisture control section
- Between 75 and 90 days dry in the soil moisture control section
-
i
Key Characteristics
- Site resides in north of the Columbia River
- Mesic areas in or near the Puget Sound that were modified by Pleistocene continental or alpine glaciation - LRU A Puget Lowlands
- Area is located in San Juan or Island Counties
- Area with soils that do not meet hydric criteria
- Forested areas
- Soils that are dry between 60 and 90 consecutive days in the soil moisture control section
- Between 75 and 90 days dry in the soil moisture control section
-
i
Key Characteristics
- Site resides in north of the Columbia River
- Mesic areas in or near the Puget Sound that were modified by Pleistocene continental or alpine glaciation - LRU A Puget Lowlands
- Area is located in San Juan or Island Counties
- Area with soils that do not meet hydric criteria
- Forested areas
- Soils that are dry between 60 and 90 consecutive days in the soil moisture control section
- Between 75 and 90 days dry in the soil moisture control section
-
i
Key Characteristics
- Site resides in north of the Columbia River
- Mesic areas in or near the Puget Sound that were modified by Pleistocene continental or alpine glaciation - LRU A Puget Lowlands
- Area is located in San Juan or Island Counties
- Area with soils that do not meet hydric criteria
- Forested areas
- Soils that are dry between 60 and 90 consecutive days in the soil moisture control section
- Between 75 and 90 days dry in the soil moisture control section
-
i
Key Characteristics
- Site resides in north of the Columbia River
- Mesic areas in or near the Puget Sound that were modified by Pleistocene continental or alpine glaciation - LRU A Puget Lowlands
- Area is located in San Juan or Island Counties
- Area with soils that do not meet hydric criteria
- Forested areas
- Soils that are dry between 60 and 90 consecutive days in the soil moisture control section
- Between 75 and 90 days dry in the soil moisture control section
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
001XESG08 – Riparian
001XESG08 – Riparian
Ephemeral water
Sand >50% & clay <25% for surface and subsurface
001XESG09 – Sandy Bottoms
001XESG09 – Sandy Bottoms
Sand <50% or clay >25% for surface and subsurface
001XESG01 – Bottoms
001XESG01 – Bottoms
>75% bedrock outcrop
001XESG07 – Outcrops
001XESG07 – Outcrops
<75% bedrock outcrop
Slope >35% & >40% surface rock
001XESG02 – Breaks
001XESG02 – Breaks
Slope <35% or <40% surface rock
Depth <30cm
001XESG12 – Very Shallow
001XESG12 – Very Shallow
Depth: 30-55cm
001XESG11 – Shallow
001XESG11 – Shallow
Depth >55cm
Rock >30% surface or >30% subsurface
001XESG04 – Deep Rocky
001XESG04 – Deep Rocky
Rock <30% surface and <30% subsurface
Clay >30% surface or >35% subsurface
001XESG03 – Clay Uplands
001XESG03 – Clay Uplands
Clay <30% surface and <35% subsurface
Sand >75% or texture is loamy sand or sandier in surface & subsurface
001XESG10 – Sandy Uplands
001XESG10 – Sandy Uplands
Sand <75% or texture is sandy loam or finer in surface & subsurface
Clay <20% or texture is sandy loam or sandier in surface
001XESG06 – Loamy Uplands
001XESG06 – Loamy Uplands
Clay >20% or texture is finer than sandy loam in surface
001XESG05 – Finer Uplands
001XESG05 – Finer Uplands
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Ecological site group keys
MLRA 1
I.
Additional water
B.
Ephemeral water
II.
Uplands
B.
<75% bedrock outcrop
2
Slope <35% or <40% surface rock
iii.
Depth >55cm
b.
Rock <30% surface and <30% subsurface
2)
Clay <30% surface and <35% subsurface
a)
Sand >75% or texture is loamy sand or sandier in surface & subsurface
... 001XESG10 – Sandy Uplands
b)
Sand <75% or texture is sandy loam or finer in surface & subsurface
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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