Major Land Resource Area 138X
North-Central Florida Ridge
Accessed: 10/09/2025
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Key Characteristics
- Site occurs along major rivers and streams and experiences regular flooding, or would in the absence of water control structures
- Site occurs on a flood plain
- Spodic horizon within 30 inches, an argillic horizon below 40, or both. Some soils may have a mollic or umbric horizon. Some soils may lack a diagnostic horizon.
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i
Key Characteristics
- Site occurs along major rivers and streams and experiences regular flooding, or would in the absence of water control structures
- Site occurs on a flood plain
- Argillic horizon between 20 and 40 inches. Some soils may have a mollic or umbric horizon.
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i
Key Characteristics
- Site occurs along major rivers and streams and experiences regular flooding, or would in the absence of water control structures
- Site occurs on a flood plain
- Argillic horizon within 20 inches. Some soils may have a mollic or umbric horizon.
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i
Key Characteristics
- Site occurs along major rivers and streams and experiences regular flooding, or would in the absence of water control structures
- Site occurs on a stream terrace
- Deep dry sands
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i
Key Characteristics
- Site occurs along major rivers and streams and experiences regular flooding, or would in the absence of water control structures
- Site occurs on a stream terrace
- Argillic horizon below 40 inches, or is absent.
-
i
Key Characteristics
- Site occurs along major rivers and streams and experiences regular flooding, or would in the absence of water control structures
- Site occurs on a stream terrace
- Argillic horizon within 20 inches, or is absent.
-
i
Key Characteristics
- Site does not occur along major rivers and stream, or if it does occur near major rivers and streams it is not influenced by regular flooding events (even in the absence of water control structures)
- Site occurs in a closed depression (concave - concave slope shapes)
- Spodic horizon within 30 inches, an argillic horizon below 40, or both. Some soils may have a mollic or umbric horizon. Some soils may lack a diagnostic horizon.
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i
Key Characteristics
- Site does not occur along major rivers and stream, or if it does occur near major rivers and streams it is not influenced by regular flooding events (even in the absence of water control structures)
- Site occurs in a closed depression (concave - concave slope shapes)
- Argillic horizon between 20 and 40 inches. Some soils may have a mollic or umbric horizon.
-
i
Key Characteristics
- Site does not occur along major rivers and stream, or if it does occur near major rivers and streams it is not influenced by regular flooding events (even in the absence of water control structures)
- Site occurs in a closed depression (concave - concave slope shapes)
- Argillic horizon within 20 inches. Some soils may have a mollic or umbric horizon.
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i
Key Characteristics
- Site does not occur along major rivers and stream, or if it does occur near major rivers and streams it is not influenced by regular flooding events (even in the absence of water control structures)
- Site occurs on lowland flats
- Spodic horizon within 30 inches, an argillic horizon below 40, or both. Some soils may have a mollic or umbric horizon. Some soils may lack a diagnostic horizon.
-
i
Key Characteristics
- Site does not occur along major rivers and stream, or if it does occur near major rivers and streams it is not influenced by regular flooding events (even in the absence of water control structures)
- Site occurs on lowland flats
- Argillic horizon between 20 and 40 inches. Some soils may have a mollic or umbric horizon.
-
i
Key Characteristics
- Site does not occur along major rivers and stream, or if it does occur near major rivers and streams it is not influenced by regular flooding events (even in the absence of water control structures)
- Site occurs on lowland flats
- Argillic horizon within 20 inches. Some soils may have a mollic or umbric horizon.
-
i
Key Characteristics
- Site does not occur along major rivers and stream, or if it does occur near major rivers and streams it is not influenced by regular flooding events (even in the absence of water control structures)
- Site occurs on uplands
- Slope nearly level to gently sloping (0 to 8%)
- Depth to seasonal high water table (SHWT) 18 to 42 inches
- Argillic or spodic horizon below 40 inches, or is absent. Some soils may have a mollic or umbric horizon.
-
i
Key Characteristics
- Site does not occur along major rivers and stream, or if it does occur near major rivers and streams it is not influenced by regular flooding events (even in the absence of water control structures)
- Site occurs on uplands
- Slope nearly level to gently sloping (0 to 8%)
- Depth to seasonal high water table (SHWT) 18 to 42 inches
- Argillic horizon between 20 and 40 inches.
-
i
Key Characteristics
- Site does not occur along major rivers and stream, or if it does occur near major rivers and streams it is not influenced by regular flooding events (even in the absence of water control structures)
- Site occurs on uplands
- Slope nearly level to gently sloping (0 to 8%)
- Depth to seasonal high water table (SHWT) 18 to 42 inches
- Argillic horizon within 20 inches.
-
i
Key Characteristics
- Site does not occur along major rivers and stream, or if it does occur near major rivers and streams it is not influenced by regular flooding events (even in the absence of water control structures)
- Site occurs on uplands
- Slope nearly level to gently sloping (0 to 8%)
- Depth to seasonal high water table (SHWT) 42 to 80 inches
- Argillic horizon below 40 inches, or is absent.
-
i
Key Characteristics
- Site does not occur along major rivers and stream, or if it does occur near major rivers and streams it is not influenced by regular flooding events (even in the absence of water control structures)
- Site occurs on uplands
- Slope nearly level to gently sloping (0 to 8%)
- Depth to seasonal high water table (SHWT) 42 to 80 inches
- Argillic horizon between 20 and 40 inches.
-
i
Key Characteristics
- Site does not occur along major rivers and stream, or if it does occur near major rivers and streams it is not influenced by regular flooding events (even in the absence of water control structures)
- Site occurs on uplands
- Slope nearly level to gently sloping (0 to 8%)
- Depth to seasonal high water table (SHWT) 42 to 80 inches
- Argillic horizon within 20 inches.
-
i
Key Characteristics
- Site does not occur along major rivers and stream, or if it does occur near major rivers and streams it is not influenced by regular flooding events (even in the absence of water control structures)
- Site occurs on uplands
- Slope nearly level to gently sloping (0 to 8%)
- Depth to seasonal high water table (SHWT) 42 to 80 inches
- Bedrock between 10 and 40 inches.
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i
Key Characteristics
- Site does not occur along major rivers and stream, or if it does occur near major rivers and streams it is not influenced by regular flooding events (even in the absence of water control structures)
- Site occurs on uplands
- Slope nearly level to gently sloping (0 to 8%)
- Depth to seasonal high water table (SHWT) greater than 80 inches
- Argillic horizon between 20 and 40 inches.
-
i
Key Characteristics
- Site does not occur along major rivers and stream, or if it does occur near major rivers and streams it is not influenced by regular flooding events (even in the absence of water control structures)
- Site occurs on uplands
- Slope nearly level to gently sloping (0 to 8%)
- Depth to seasonal high water table (SHWT) greater than 80 inches
- Argillic horizon within 20 inches.
-
i
Key Characteristics
- Site does not occur along major rivers and stream, or if it does occur near major rivers and streams it is not influenced by regular flooding events (even in the absence of water control structures)
- Site occurs on uplands
- Slope strongly sloping to very steep (>8 to 60%)
-
i
Key Characteristics
- Site does not occur along major rivers and stream, or if it does occur near major rivers and streams it is not influenced by regular flooding events (even in the absence of water control structures)
- Site occurs on xeric uplands
- Slope nearly level to gently sloping (0 to 8%)
-
i
Key Characteristics
- Site does not occur along major rivers and stream, or if it does occur near major rivers and streams it is not influenced by regular flooding events (even in the absence of water control structures)
- Site occurs on xeric uplands
- Slope strongly sloping to very steep (>8 to 60%)
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Ecological site keys
MLRA 138
Landscape
Site occurs along major rivers and streams and experiences regular flooding, or would in the absence of water control structures
Landform
Site occurs on a flood plain
Soil
Spodic horizon within 30 inches, an argillic horizon below 40, or both. Some soils may have a mollic or umbric horizon. Some soils may lack a diagnostic horizon.
... PX138X00Y010 – Sandy Flood Plain Marshes and Swamps
Soil
Argillic horizon between 20 and 40 inches. Some soils may have a mollic or umbric horizon.
... PX138X00Y020 – Sandy Over Loamy Flood Plain Marshes and Swamps
Soil
Argillic horizon within 20 inches. Some soils may have a mollic or umbric horizon.
... PX138X00Y030 – Loamy and Clayey Flood Plain Marshes and Swamps
Landform
Site occurs on a stream terrace
Soil
Argillic horizon below 40 inches, or is absent.
... PX138X00Y050 – Sandy or Sandy Over Loamy Upland Pine on Stream Terraces
Soil
Argillic horizon within 20 inches, or is absent.
... PX138X00Y060 – Loamy and Clayey Bottomland Forests on Stream Terraces
Landscape
Site does not occur along major rivers and stream, or if it does occur near major rivers and streams it is not influenced by regular flooding events (even in the absence of water control structures)
Landform
Site occurs in a closed depression (concave - concave slope shapes)
Soil
Spodic horizon within 30 inches, an argillic horizon below 40, or both. Some soils may have a mollic or umbric horizon. Some soils may lack a diagnostic horizon.
... PX138X00Y070 – Sandy Depression Basin and Dome Swamps
Soil
Argillic horizon between 20 and 40 inches. Some soils may have a mollic or umbric horizon.
... PX138X00Y080 – Sandy Over Loamy Depression Basin and Dome Swamps
Soil
Argillic horizon within 20 inches. Some soils may have a mollic or umbric horizon.
... PX138X00Y090 – Loamy and Clayey Depression Bottomland Forests
Landform
Site occurs on lowland flats
Soil
Spodic horizon within 30 inches, an argillic horizon below 40, or both. Some soils may have a mollic or umbric horizon. Some soils may lack a diagnostic horizon.
... PX138X00Y100 – Sandy Lowland Flats
Soil
Argillic horizon between 20 and 40 inches. Some soils may have a mollic or umbric horizon.
... PX138X00Y110 – Sandy Over Loamy Lowland Flats
Soil
Argillic horizon within 20 inches. Some soils may have a mollic or umbric horizon.
... PX138X00Y120 – Loamy and Clayey Lowland Flats
Landform
Site occurs on uplands
Slope
Slope nearly level to gently sloping (0 to 8%)
SHWT
Depth to seasonal high water table (SHWT) 18 to 42 inches
Soil
Argillic or spodic horizon below 40 inches, or is absent. Some soils may have a mollic or umbric horizon.
... PX138X00Y130 – Moist Sandy Upland Pine
Soil
Argillic horizon between 20 and 40 inches.
... PX138X00Y140 – Moist Sandy Over Loamy Upland Pine
SHWT
Depth to seasonal high water table (SHWT) 42 to 80 inches
SHWT
Depth to seasonal high water table (SHWT) greater than 80 inches
Soil
Argillic horizon between 20 and 40 inches.
... PX138X00Y200 – Very Dry Sandy Over Loamy Upland Pine
Slope
Slope strongly sloping to very steep (>8 to 60%)
... PX138X00Y220 – Sandy Upland Mixed Forests on Steep Slopes
Landform
Site occurs on xeric uplands
Slope
Slope nearly level to gently sloping (0 to 8%)
... PX138X00Y230 – Sandhill or Scrub on Gentle Slopes of Uplands
Slope
Slope strongly sloping to very steep (>8 to 60%)
... PX138X00Y240 – Sandhill or Scrub on Steep Slopes of Uplands
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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.
