Natural Resources
Conservation Service
Major Land Resource Area 191X
Major Land Resource Area
Accessed: 04/21/2026
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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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ProvisionalQX191X01X505/F191XY505MPVery Low Available Water Capacity Soils on Limestone Plateaus and Escarpments -
ProvisionalQX191X01X506/F191XY506MPSomewhat Poorly and Poorly Drained Valley Bottoms and Coastal Plains
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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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Ecological sites
Major Land Resource Areas
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precipitation
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Precipitation
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Soil texture
Soil texture is Loamy Sand or soil particle size is Loamy Skeletal; Soils are excessively or somewhat excessively drained…(Shioya, Takpochao Variant)
QX191X01X501 – Excessively and Somewhat Excessively Drained Coastal Strand
QX191X01X501 – Excessively and Somewhat Excessively Drained Coastal Strand
Soil texture or particle size are not as above; Soil is not excessively or somewhat excessively drained
Water-table depth is very shallow (0 to 10 inches); Soils are very poorly drained
Water-table depth not as above; Soils are not very poorly drained
Wet at ~ 0 inches; Surface soil is 8 inches muck over mucky clay loam…(Mesei variant)
QX191X01X005 – Very Poorly Drained Muck
QX191X01X005 – Very Poorly Drained Muck
Wet at ~ 9 inches; Surface soil is 2 inches mucky clay over clay…(Inarajan variant)
QX191X01X507 – Very Poorly Drained Mucky Clay
QX191X01X507 – Very Poorly Drained Mucky Clay
Landform is Coastal Plain; Soils are clays and sandy clay loams developed from argillaceous alluvium…(Inarajan)
QX191X01X506 – Somewhat Poorly and Poorly Drained Valley Bottoms and Coastal Plains
QX191X01X506 – Somewhat Poorly and Poorly Drained Valley Bottoms and Coastal Plains
Landform is Basin Floor Positions on Limestone Plateaus (see OSD); Soils are clays developed from tuff
QX191X01X004 – Somewhat Poorly and Poorly Drained Limestone Basins
QX191X01X004 – Somewhat Poorly and Poorly Drained Limestone Basins
Landform is Limestone Plateaus
Soils are deep (40 to 60 inches) and very deep (60 inches or greater)…(Kagman, Saipan, Yigo will be added)
QX191X01X502 – Deep and Very Deep Soils on Limestone Plateaus
QX191X01X502 – Deep and Very Deep Soils on Limestone Plateaus
Soils are very shallow (0 to 10 inches), shallow (10 to 20 inches), or moderately deep (20 to 40 inches)
Frequently shrouded in clouds and fog…(Luta “MOIST” Phase)
QX191X01X504 – Limestone Plateau Cloud Forest
QX191X01X504 – Limestone Plateau Cloud Forest
Not frequently shrouded in clouds and fog
Subsurface soils contain 0 to 12% rock frags > 3 inches
QX191X01X503 – Very Shallow to Moderately Deep Soils on Limestone Plateaus
QX191X01X503 – Very Shallow to Moderately Deep Soils on Limestone Plateaus
Subsurface soils contain 13 to 40% rock frags > 3 inches…(Ritidian, Takpochao, Luta “DRY” Phase)
QX191X01X505 – Very Low Available Water Capacity Soils on Limestone Plateaus and Escarpments
QX191X01X505 – Very Low Available Water Capacity Soils on Limestone Plateaus and Escarpments
Long term average mean annual precipitation
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- 140 – 500cm (55 – 197in)
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cm
Long term average frost free days
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- 350 – 366days
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days
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- 0 – 200m (0 – 700ft)
- 200 – 400m (700 – 1300ft)
- 400 – 600m (1300 – 2000ft)
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m
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- 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%
- 80 – 90%
- 90 – 100%
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%
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- Basin floor
- Coastal plain
- Depression
- Mangrove swamp
- Marsh
- Plateau
- Shore
- Valley
- Valley floor
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- Limestone, argillaceous
- Limestone, coral
- Limestone, unspecified
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- Alluvium
- Colluvium
- Loess
- Organic, unspecified
- Residuum
Soil surface texture
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- Clay
- Clay loam
- Loamy sand
- Sandy clay loam
- Silty clay
- Sandy loam
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Ecological site keys
ES Site Key, MLRA 191
I.
Soil texture is Loamy Sand or soil particle size is Loamy Skeletal; Soils are excessively or somewhat excessively drained…(Shioya, Takpochao Variant)
... QX191X01X501 – Excessively and Somewhat Excessively Drained Coastal Strand
II.
Soil texture or particle size are not as above; Soil is not excessively or somewhat excessively drained
A.
Water-table depth is very shallow (0 to 10 inches); Soils are very poorly drained
1
Wet at ~ 0 inches; Surface soil is 8 inches muck over mucky clay loam…(Mesei variant)
... QX191X01X005 – Very Poorly Drained Muck
2
Wet at ~ 9 inches; Surface soil is 2 inches mucky clay over clay…(Inarajan variant)
... QX191X01X507 – Very Poorly Drained Mucky Clay
B.
Water-table depth not as above; Soils are not very poorly drained
1
Landform is Coastal Plain; Soils are clays and sandy clay loams developed from argillaceous alluvium…(Inarajan)
... QX191X01X506 – Somewhat Poorly and Poorly Drained Valley Bottoms and Coastal Plains
2
Landform is Basin Floor Positions on Limestone Plateaus (see OSD); Soils are clays developed from tuff
... QX191X01X004 – Somewhat Poorly and Poorly Drained Limestone Basins
3
Landform is Limestone Plateaus
i.
Soils are deep (40 to 60 inches) and very deep (60 inches or greater)…(Kagman, Saipan, Yigo will be added)
... QX191X01X502 – Deep and Very Deep Soils on Limestone Plateaus
ii.
Soils are very shallow (0 to 10 inches), shallow (10 to 20 inches), or moderately deep (20 to 40 inches)
a.
Frequently shrouded in clouds and fog…(Luta “MOIST” Phase)
... QX191X01X504 – Limestone Plateau Cloud Forest
b.
Not frequently shrouded in clouds and fog
1)
Subsurface soils contain 0 to 12% rock frags > 3 inches
... QX191X01X503 – Very Shallow to Moderately Deep Soils on Limestone Plateaus
2)
Subsurface soils contain 13 to 40% rock frags > 3 inches…(Ritidian, Takpochao, Luta “DRY” Phase)
... QX191X01X505 – Very Low Available Water Capacity Soils on Limestone Plateaus and Escarpments
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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