Natural Resources
Conservation Service
Major Land Resource Area 149B
Major Land Resource Area
Accessed: 04/23/2026
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1
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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.
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precipitation
frost free days
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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.
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Add ecological sites and Major Land Resource Areas to your briefcase by clicking on the briefcase (
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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
Parent materials of redistributed recent eolian or non-submerged marine deposit
Parent materials otherwise (glacio-lacustrine, glacio-fluvial, glacial till, HAHT (Human-Assisted Human Transported), alluvium, organic material, submerged materials/deposit)
Soils moderately well-drained or less
R149BY012MA – Coastal Backbarrier Dune Flats
R149BY012MA – Coastal Backbarrier Dune Flats
Soils well-drained or better
Soils well-drained (combined outwash Go to 8b)
F149BY006NY – Well Drained Outwash
F149BY006NY – Well Drained Outwash
Soils excessively drained
R149BY002MA – Coastal Dunes
R149BY002MA – Coastal Dunes
Parent materials glacial in origin or old alluvium (NOT HAHT or predominantly organic material or submerged material/deposit)
Parent materials HAHT or organic material or submerged material/deposits
Glaciated parent materials water-deposited
Glaciated parent materials ice-deposited till
Glaciated parent materials quiet-water-deposited glacio-lacustrine or old alluvium
Glaciated parent materials active-water-deposited glacio-fluvial
Soils moderately well-drained or better
F149BY003MA – Well Drained Lake Plain
F149BY003MA – Well Drained Lake Plain
Soils somewhat poorly drained to poorly-drained
F149BY004NY – Wet Lake Plain
F149BY004NY – Wet Lake Plain
Soils well-drained or better
Soils moderately-well-drained or less
Soils excessively-well-drained
F149BY005MA – Dry Outwash
F149BY005MA – Dry Outwash
Soils well-drained
F149BY006NY – Well Drained Outwash
F149BY006NY – Well Drained Outwash
Soils moderately well-drained
F149BY007NY – Moist Outwash
F149BY007NY – Moist Outwash
Soils very-poorly-drained
F149BY008MA – Very Wet Outwash
F149BY008MA – Very Wet Outwash
Glaciated parent materials predominately serpentine
R149BY001NY – Serpentine Till Uplands
R149BY001NY – Serpentine Till Uplands
Glaciated parent materials otherwise (not Serpentine)
Glaciated parent materials of dense till (basal till)
Glaciated parent materials of sorted till (ablation till)
Soils well-drained
F149BY009MA – Well Drained Dense Till Uplands
F149BY009MA – Well Drained Dense Till Uplands
Soils poorly drained (or very poorly drained – go to 10b)
F149BY008MA – Very Wet Outwash
F149BY008MA – Very Wet Outwash
Soils well-drained
F149BY011MA – Well Drained Till Uplands
F149BY011MA – Well Drained Till Uplands
Soils moderately-well-drained
F149BY010MA – Moist Till Uplands
F149BY010MA – Moist Till Uplands
Parent Materials HAHT (Human-assisted Human-transported)
F149BY100NY – Urban Site Complex
F149BY100NY – Urban Site Complex
Parent materials of organic material (inland or tidal) or submerged material/deposit
Parent materials organic material (inland or tidal) GO TO MLRA 144A KEY
Parent materials submerged material/deposit (subaqueous soils) GO TO MLRA 144A KEY
Long term average mean annual precipitation
- No filter
- 100 – 120cm (39 – 47in)
- 120 – 140cm (47 – 55in)
—
cm
Long term average frost free days
- No filter
- 130 – 150days
- 150 – 170days
- 170 – 190days
- 190 – 210days
- 210 – 230days
—
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%
- 25 – 30%
- 30 – 35%
- 35 – 40%
- 40 – 45%
- 45 – 50%
- 50 – 60%
- 60 – 70%
—
%
- No filter
- Back-barrier flat
- Coastal plain
- Delta
- Depression
- Dike
- Drainageway
- Dune
- Glacial lake (relict)
- Ground moraine
- Hill
- Ice-contact slope
- Kettle
- Lake plain
- Lake terrace
- Lakebed
- Moraine
- Outwash plain
- Outwash terrace
- Pitted outwash plain
- Ridge
- Terrace
- No filter
- Granite and gneiss
- Igneous, metamorphic and sedimentary
- Sandstone and siltstone
- Schist, unspecified
- No filter
- Alluvium
- Eolian deposits
- Glaciofluvial deposits
- Glaciolacustrine deposits
- Lacustrine deposits
- Loess
- Marine deposits
- Outwash
- Till, ablation
- Till, unspecified
Soil surface texture
- No filter
- Coarse sand
- Fine sandy loam
- Loam
- Loamy coarse sand
- Loamy sand
- Sand
- Silt loam
- Sandy loam
- Very fine sandy loam
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Ecological site keys
PES KEY MLRA 149B
1a.
Parent materials of redistributed recent eolian or non-submerged marine deposit
2b.
Soils well-drained or better
1b.
Parent materials otherwise (glacio-lacustrine, glacio-fluvial, glacial till, HAHT (Human-Assisted Human Transported), alluvium, organic material, submerged materials/deposit)
4a.
Parent materials glacial in origin or old alluvium (NOT HAHT or predominantly organic material or submerged material/deposit)
5a.
Glaciated parent materials water-deposited
6a.
Glaciated parent materials quiet-water-deposited glacio-lacustrine or old alluvium
6b.
Glaciated parent materials active-water-deposited glacio-fluvial
8a.
Soils well-drained or better
8b.
Soils moderately-well-drained or less
5b.
Glaciated parent materials ice-deposited till
11b.
Glaciated parent materials otherwise (not Serpentine)
12a.
Glaciated parent materials of dense till (basal till)
12b.
Glaciated parent materials of sorted till (ablation till)
4b.
Parent materials HAHT or organic material or submerged material/deposits
15b.
Parent materials of organic material (inland or tidal) or submerged material/deposit
16a.
Parent materials organic material (inland or tidal) GO TO MLRA 144A KEY
16b.
Parent materials submerged material/deposit (subaqueous soils) GO TO MLRA 144A KEY
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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