Major Land Resource Area 109X
Iowa and Missouri Heavy Till Plain
Accessed: 10/07/2024
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1
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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.
Ecological site list
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i
Key Characteristics
- Upland Summits, Shoulders, or Backslopes
- Bedrock > 20", or soft shale bedrock
- Loess >24" (dominantly loess)
- Alfisol
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Key Characteristics
- Upland Drainageways
- Moderately Well, Well Drained
- Not Mollic
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Key Characteristics
- Upland Summits, Shoulders, or Backslopes
- Bedrock > 20", or soft shale bedrock
- Little or no loess
- <15% slope
- Till
- Alfisol
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i
Key Characteristics
- Upland Summits, Shoulders, or Backslopes
- Bedrock > 20", or soft shale bedrock
- Little or no loess
- >14% slope
- Till
- Alfic
- North, East aspects
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i
Key Characteristics
- Upland Summits, Shoulders, or Backslopes
- Bedrock > 20", or soft shale bedrock
- Little or no loess
- <15% slope
- Interbedded shale, sandstone, siltstone, limestone residuum
- Alfisol
-
i
Key Characteristics
- Upland Summits, Shoulders, or Backslopes
- Bedrock > 20", or soft shale bedrock
- Little or no loess
- >14% slope
- Interbedded shale, sandstone, siltstone, limestone residuum
- Alfic
- North, East aspects
-
i
Key Characteristics
- Upland Summits, Shoulders, or Backslopes
- Bedrock > 20", or soft shale bedrock
- Little or no loess
- >14% slope
- Limestone residuum; loamy surface
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i
Key Characteristics
- Footslopes, High Loess-Covered Terraces
- Alfic
- High Loess-covered Stream/Outwash Terraces
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Key Characteristics
- Upland Summits, Shoulders, or Backslopes
- Bedrock > 20", or soft shale bedrock
- Little or no loess
- >14% slope
- Till
- Alfic
- South, West aspects
-
i
Key Characteristics
- Upland Summits, Shoulders, or Backslopes
- Bedrock > 20", or soft shale bedrock
- Little or no loess
- >14% slope
- Interbedded shale, sandstone, siltstone, limestone residuum
- Alfic
- South, West aspects
-
i
Key Characteristics
- Floodplains
- Not Ponded
- Adjacent to current/former channel
-
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Key Characteristics
- Floodplains
- Not Ponded
- Adjacent to Riverfront Forest (Somewhat Poorly, Poorly Drained)
-
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Key Characteristics
- Upland Summits, Shoulders, or Backslopes
- Bedrock > 20", or soft shale bedrock
- Loess >24" (dominantly loess)
- Mollisol/Mollic subgroup
- Claypan
-
i
Key Characteristics
- Upland Summits, Shoulders, or Backslopes
- Bedrock > 20", or soft shale bedrock
- Loess >24" (dominantly loess)
- Mollisol/Mollic subgroup
- No root restriction
-
i
Key Characteristics
- Floodplains
- Not Ponded
- Not adjacent to current/former channel
- Farthest from channel
- Moderately Well Drained; loamy
-
i
Key Characteristics
- Upland Summits, Shoulders, or Backslopes
- Bedrock > 20", or soft shale bedrock
- Little or no loess
- <15% slope
- Till
- Mollisol
-
i
Key Characteristics
- Upland Summits, Shoulders, or Backslopes
- Bedrock > 20", or soft shale bedrock
- Little or no loess
- >14% slope
- Till
- Mollic or Mollic intergrade
-
i
Key Characteristics
- Upland Summits, Shoulders, or Backslopes
- Bedrock > 20", or soft shale bedrock
- Little or no loess
- <15% slope
- Interbedded shale, sandstone, siltstone, limestone residuum
- Mollisol/Mollic subgroup
-
i
Key Characteristics
- Upland Summits, Shoulders, or Backslopes
- Bedrock > 20", or soft shale bedrock
- Little or no loess
- >14% slope
- Interbedded shale, sandstone, siltstone, limestone residuum
- Mollisol/Mollic subgroup
-
i
Key Characteristics
- Footslopes, High Loess-Covered Terraces
- Mollic
- Moderately Well, Well Drained
-
i
Key Characteristics
- Upland Summits, Shoulders, or Backslopes
- Bedrock < 20" to Limestone
-
i
Key Characteristics
- Upland Drainageways
- Moderately Well, Well Drained
- Mollic
-
i
Key Characteristics
- Upland Drainageways
- Somewhat Poorly, Poorly Drained
-
i
Key Characteristics
- Floodplains
- Not Ponded
- Not adjacent to current/former channel
- Farthest from channel
- WET FLOODPLAIN PRAIRIE Somewhat Poorly, Poorly Drained; clayey
-
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Key Characteristics
- Floodplains
- Ponded
-
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Key Characteristics
- Low Stream Terraces & Floodplain Steps (stepped up from active floodplain; variable flooding)
- Moderately Well, Well Drained
-
i
Key Characteristics
- Footslopes, High Loess-Covered Terraces
- Mollic
- Somewhat Poorly, Poorly Drained
-
i
Key Characteristics
- Low Stream Terraces & Floodplain Steps (stepped up from active floodplain; variable flooding)
- Somewhat Poorly, Poorly, Drained
-
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Key Characteristics
- Upland Summits, Shoulders, or Backslopes
- Bedrock > 20", or soft shale bedrock
- Little or no loess
- <15% slope
- Till
- Mollic subgroup
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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.