Natural Resources
Conservation Service
Major Land Resource Area 147X
Major Land Resource Area
Accessed: 04/16/2026
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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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Ecological sites
Major Land Resource Areas
Ecological site photos
Tools
Filter by
interactive key
precipitation
frost free days
more..
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Type
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Filters
Interactive key
Precipitation
Frost free days
Elevation
Slope
Landform
Parent material origin
Parent material kind
Soil texture
Dichotomous Key
Outline (multiple leads)
Non [not] Human Transported Materials or Mine Spoil
Human Transported Materials or Mine Spoil
Mesic Soil Temperature Regime
Frigid uplands -- Frigid Mixed Sedimentary Uplands
F147XY015PA – Frigid Mixed Sedimentary Upland
F147XY015PA – Frigid Mixed Sedimentary Upland
Not floodwater (Alluvium) or wind-deposited (Eolian) materials, materials otherwise (Residuum, Colluvium)
Water deposited (Alluvium) or wind-deposited (Eolian) materials
Upland summits, shoulders, backslopes -- Residuum
Footslopes, benches, or toeslopes – colluvium
Acid shales, sandstones, and siltstones (mixed sedimentary) and sandstone dominated
Limestone and calcareous SS and shales (mixed limestone)
Acid shales, sandstones, and siltstones (mixed sedimentary)
Sandstone dominated
Bedrock <40” (100cm) -- Shallow to MD Acid Mixed Sedimentary Upland
F147XY008PA – Shallow Mixed Sedimentary Upland
F147XY008PA – Shallow Mixed Sedimentary Upland
Bedrock >40” (100 cm) - Deep Acid Mixed Sedimentary Upland
F147XY002PA – Mixed Sedimentary Upland
F147XY002PA – Mixed Sedimentary Upland
Bedrock <40” (100cm) - (combined with below)
Bedrock >40” (100 cm) -- Sandstone Upland
F147XY004PA – Sandstone Upland
F147XY004PA – Sandstone Upland
Bedrock <40” (100cm) – (combined with 10b - below)
F147XY003PA – Mixed Limestone Upland
F147XY003PA – Mixed Limestone Upland
Bedrock >40” (100cm) -- Mixed Limestone Upland
F147XY003PA – Mixed Limestone Upland
F147XY003PA – Mixed Limestone Upland
Acidic Shales, SS, and Siltstone (Mixed Sedimentary and Sandstone)
Limestone and Calcareous SS and Shales (Mixed Limestone)
Well Drained and MWD --combined with Deep Acid Mixed Sedimentary Upland (above)
F147XY002PA – Mixed Sedimentary Upland
F147XY002PA – Mixed Sedimentary Upland
Poorly Drained and SPD -- PD Acidic Mixed Sedimentary Toeslopes
F147XY005PA – Poorly Drained Mixed Sedimentary Toeslope
F147XY005PA – Poorly Drained Mixed Sedimentary Toeslope
Well Drained and MWD -- Mixed Limestone Lower slope
F147XY006PA – Mixed Limestone Lower Slope
F147XY006PA – Mixed Limestone Lower Slope
Poorly Drained and SPD -- combined with PD floodplains below)
F147XY011PA – Poorly Drained Fine Mixed Floodplain
F147XY011PA – Poorly Drained Fine Mixed Floodplain
Water deposited – Alluvium
Wind deposited - Eolian Deposits -- Combined with Loamy to Coarse Terrace (above)
F147XY007PA – Loamy To Coarse Terrace
F147XY007PA – Loamy To Coarse Terrace
Not-actively flooded to rarely-flooded deposits -Terraces
Floodplains and Drainageways
Well Drained and MWD -- Loamy to Coarse Terrace
F147XY007PA – Loamy To Coarse Terrace
F147XY007PA – Loamy To Coarse Terrace
Poorly Drained and SPD -- Fine Poorly Drained Alluvial Terrace
F147XY001PA – Poorly Drained Fine Alluvial Terrace
F147XY001PA – Poorly Drained Fine Alluvial Terrace
Shales, Sandstone, Limestones, and Siltstone
Marl, pure limestone, strongly carbonaceous
Moderately Well Drained to EWD
Poorly Drained to VPD -- Poorly Drained Fine Mixed Floodplain
F147XY011PA – Poorly Drained Fine Mixed Floodplain
F147XY011PA – Poorly Drained Fine Mixed Floodplain
Loamy -- Loamy Mixed Floodplain
F147XY009PA – Loamy Mixed Floodplain
F147XY009PA – Loamy Mixed Floodplain
Coarse textured -- Coarse Mixed Floodplain
F147XY010PA – Coarse Mixed Floodplain
F147XY010PA – Coarse Mixed Floodplain
Well Drained to MWD -- Calcareous Loamy Bottomland
F147XY012PA – Calcareous Loamy Bottomland
F147XY012PA – Calcareous Loamy Bottomland
Poorly Drained and SPD - Poorly Drained Calcareous Bottomland
F147XY013PA – Poorly Drained Calcareous Bottomland
F147XY013PA – Poorly Drained Calcareous Bottomland
Mine Spoil (Reserved)
Urban lands (Reserved)
Uplands – summits, shoulders, or backslopes - residuum
Footslopes, benches, or Toeslopes - colluvium
Terraces – rarely flooded or not flooded
Eolian Deposits - Combined with Loamy to Coarse Terrace
Floodplains and Drainageways
Mine Spoil
F147XY014PA – Mine Spoil Land
F147XY014PA – Mine Spoil Land
Frigid uplands
F147XY015PA – Frigid Mixed Sedimentary Upland
F147XY015PA – Frigid Mixed Sedimentary Upland
Urban uplands
F147XY016PA – Urban Uplands
F147XY016PA – Urban Uplands
Acidic Shales, SS, and Siltstone (Mixed Sedimentary)
Limestone and Calcareous SS and Shales (Mixed Limestone) –includes Pre-Wisconsinan tills
F147XY003PA – Mixed Limestone Upland
F147XY003PA – Mixed Limestone Upland
Sandstone dominated
F147XY004PA – Sandstone Upland
F147XY004PA – Sandstone Upland
Bedrock <40” (100cm)
F147XY008PA – Shallow Mixed Sedimentary Upland
F147XY008PA – Shallow Mixed Sedimentary Upland
Bedrock >40” (100 cm)
F147XY002PA – Mixed Sedimentary Upland
F147XY002PA – Mixed Sedimentary Upland
Acidic Shales, SS, and Siltstone (Mixed Sedimentary and Sandstone)
Limestone and Calcareous SS and Shales (Mixed Limestone)
Well Drained and MWD - combined with Deep Acid Mixed Sedimentary Upland
Poorly Drained and SPD
F147XY005PA – Poorly Drained Mixed Sedimentary Toeslope
F147XY005PA – Poorly Drained Mixed Sedimentary Toeslope
Well Drained and MWD
F147XY006PA – Mixed Limestone Lower Slope
F147XY006PA – Mixed Limestone Lower Slope
Poorly Drained and SPD - combined with PD floodplains
Well Drained and MWD
F147XY007PA – Loamy To Coarse Terrace
F147XY007PA – Loamy To Coarse Terrace
Poorly Drained and SPD
F147XY001PA – Poorly Drained Fine Alluvial Terrace
F147XY001PA – Poorly Drained Fine Alluvial Terrace
Shales, Sandstone, Limestones, and Siltstone Uplands
Marl, pure limestone, strongly carbonaceous
Well Drained to MWD
F147XY009PA – Loamy Mixed Floodplain
F147XY009PA – Loamy Mixed Floodplain
Well Drained to EWD
F147XY010PA – Coarse Mixed Floodplain
F147XY010PA – Coarse Mixed Floodplain
Poorly Drained to VPD
F147XY011PA – Poorly Drained Fine Mixed Floodplain
F147XY011PA – Poorly Drained Fine Mixed Floodplain
Well Drained to MWD
F147XY012PA – Calcareous Loamy Bottomland
F147XY012PA – Calcareous Loamy Bottomland
Poorly Drained and SPD
F147XY013PA – Poorly Drained Calcareous Bottomland
F147XY013PA – Poorly Drained Calcareous Bottomland
Long term average mean annual precipitation
- No filter
- 80 – 100cm (31 – 39in)
- 100 – 120cm (39 – 47in)
—
cm
Long term average frost free days
- No filter
- 90 – 110days
- 110 – 130days
- 130 – 150days
- 150 – 170days
—
days
- No filter
- 0 – 200m (0 – 700ft)
- 200 – 400m (700 – 1300ft)
- 400 – 600m (1300 – 2000ft)
- 600 – 800m (2000 – 2600ft)
- 800 – 1000m (2600 – 3300ft)
- 1000 – 1200m (3300 – 3900ft)
- 1200 – 1400m (3900 – 4600ft)
—
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%
- 70 – 80%
—
%
- No filter
- Alluvial fan
- Backswamp
- Cove
- Depression
- Fan
- Flood plain
- Hill
- Lake plain
- Mountain
- Mountain slope
- Natural levee
- Stream terrace
- Swale
- Terrace
- Valley
- No filter
- Conglomerate, unspecified
- Dolomite (dolostone)
- Limestone and shale
- Limestone, argillaceous
- Limestone, unspecified
- Sandstone and shale
- Sandstone and siltstone
- Sandstone, unspecified
- Shale and siltstone
- Shale, acid
- Shale, calcareous
- Shale, unspecified
- Siltstone, unspecified
- No filter
- Alluvium
- Colluvium
- Eolian deposits
- Lacustrine deposits
- Mine spoil or earthy fill
- Residuum
- Till, unspecified
Soil surface texture
- No filter
- Fine sandy loam
- Loam
- Loamy sand
- Sand
- Silty clay loam
- Silt loam
- Sandy loam
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Ecological site keys
147PES KEY dichotomous
1a.
Non [not] Human Transported Materials or Mine Spoil
2a.
Mesic Soil Temperature Regime
3a.
Not floodwater (Alluvium) or wind-deposited (Eolian) materials, materials otherwise (Residuum, Colluvium)
4a.
Upland summits, shoulders, backslopes -- Residuum
5a.
Acid shales, sandstones, and siltstones (mixed sedimentary) and sandstone dominated
6a.
Acid shales, sandstones, and siltstones (mixed sedimentary)
7a.
Bedrock <40” (100cm) -- Shallow to MD Acid Mixed Sedimentary Upland
... F147XY008PA – Shallow Mixed Sedimentary Upland
7b.
Bedrock >40” (100 cm) - Deep Acid Mixed Sedimentary Upland
... F147XY002PA – Mixed Sedimentary Upland
6b.
Sandstone dominated
8A.
Bedrock <40” (100cm) - (combined with below)
5b.
Limestone and calcareous SS and shales (mixed limestone)
4b.
Footslopes, benches, or toeslopes – colluvium
10a.
Acidic Shales, SS, and Siltstone (Mixed Sedimentary and Sandstone)
11a.
Well Drained and MWD --combined with Deep Acid Mixed Sedimentary Upland (above)
... F147XY002PA – Mixed Sedimentary Upland
11b.
Poorly Drained and SPD -- PD Acidic Mixed Sedimentary Toeslopes
... F147XY005PA – Poorly Drained Mixed Sedimentary Toeslope
10b.
Limestone and Calcareous SS and Shales (Mixed Limestone)
12a.
Well Drained and MWD -- Mixed Limestone Lower slope
... F147XY006PA – Mixed Limestone Lower Slope
12b.
Poorly Drained and SPD -- combined with PD floodplains below)
... F147XY011PA – Poorly Drained Fine Mixed Floodplain
3b.
Water deposited (Alluvium) or wind-deposited (Eolian) materials
13a.
Water deposited – Alluvium
14a.
Not-actively flooded to rarely-flooded deposits -Terraces
15b.
Poorly Drained and SPD -- Fine Poorly Drained Alluvial Terrace
... F147XY001PA – Poorly Drained Fine Alluvial Terrace
14b.
Floodplains and Drainageways
16a.
Shales, Sandstone, Limestones, and Siltstone
17a.
Moderately Well Drained to EWD
17b.
Poorly Drained to VPD -- Poorly Drained Fine Mixed Floodplain
... F147XY011PA – Poorly Drained Fine Mixed Floodplain
16b.
Marl, pure limestone, strongly carbonaceous
19a.
Well Drained to MWD -- Calcareous Loamy Bottomland
... F147XY012PA – Calcareous Loamy Bottomland
19b.
Poorly Drained and SPD - Poorly Drained Calcareous Bottomland
... F147XY013PA – Poorly Drained Calcareous Bottomland
13b.
Wind deposited - Eolian Deposits -- Combined with Loamy to Coarse Terrace (above)
... F147XY007PA – Loamy To Coarse Terrace
2b.
Frigid uplands -- Frigid Mixed Sedimentary Uplands
... F147XY015PA – Frigid Mixed Sedimentary Upland
1b.
Human Transported Materials or Mine Spoil
20a.
Mine Spoil (Reserved)
20b.
Urban lands (Reserved)
MLRA 147
I.
Uplands – summits, shoulders, or backslopes - residuum
A.
Acidic Shales, SS, and Siltstone (Mixed Sedimentary)
B.
Limestone and Calcareous SS and Shales (Mixed Limestone) –includes Pre-Wisconsinan tills
... F147XY003PA – Mixed Limestone Upland
II.
Footslopes, benches, or Toeslopes - colluvium
A.
Acidic Shales, SS, and Siltstone (Mixed Sedimentary and Sandstone)
1
Well Drained and MWD - combined with Deep Acid Mixed Sedimentary Upland
B.
Limestone and Calcareous SS and Shales (Mixed Limestone)
2
Poorly Drained and SPD - combined with PD floodplains
III.
Terraces – rarely flooded or not flooded
IV.
Eolian Deposits - Combined with Loamy to Coarse Terrace
V.
Floodplains and Drainageways
A.
Shales, Sandstone, Limestones, and Siltstone Uplands
B.
Marl, pure limestone, strongly carbonaceous
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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