Natural Resources
Conservation Service
Ecological site R111XC010IN
Well Drained Overflow
Accessed: 11/21/2024
General information
Provisional. A provisional ecological site description has undergone quality control and quality assurance review. It contains a working state and transition model and enough information to identify the ecological site.
MLRA notes
Major Land Resource Area (MLRA): 111X–Indiana and Ohio Till Plain
A PROVISIONAL ECOLOGICAL SITE is a conceptual grouping of soil map unit components within a Major Land Resource Area (MLRA) based on the similarities in response to management. Although there may be wide variability in the productivity of the soils grouped into a Provisional Site, the soil vegetation interactions as expressed in the State and Transition Model are similar and the management actions required to achieve objectives, whether maintaining the existing ecological state or managing for an alternative state, are similar. Provisional Sites are likely to be refined into more precise group during the process of meeting the APPROVED ECOLOGICAL SITE DESCRIPTION criteria.
This PROVISIONAL ECOLOGICAL SITE has been developed to meet the standards established in the National Ecological Site Handbook. The information associated with this ecological site does not meet the Approved Ecological Site Description Standard, but it has been through a Quality Control and Quality Assurance processes to assure consistency and completeness. Further investigations, reviews and correlations are necessary before it becomes an Approved Ecological Site Description.
111C – Indiana and Ohio Till Plain, Northwestern Part. This MLRA is in the glaciated part of north-central Indiana and is dominated by glacial till plains broken in places by lake plains, outwash plains, and flood plains. Areas that parallel most of the major rivers and streams have deposits of sand.
Although it is an important agricultural region, MLRA 111C hosts a large proportion of Indiana’s biodiversity.
Classification relationships
Major Land Resource Area (MLRA)(USDA-Natural Resources Conservation Service, 2006)
USFS Ecological Regions (USDA, 2007):
Sections - Central Till Plains, Beech Maple (222H), South Central Great Lakes (222J), Central Till Plains and Grand Prairies (251D)
Subsections - Kalamazoo-Elkhart Moraines and Plains (222Jh), Steuben Interlobate Moraines (222Ji), Bluffton Till Plains (222Ha), Entrenched Valleys (222Hf), Miami-Scioto Plain-Tipton Till Plain (222Hb), Kankakee Sands (251Dg) and Eastern Grand Prairie (251Dd).
NatureServe Systems anticipated (NatureServe, 2011): Agriculture-Pasture/Hay, Agriculture-Cultivated Crops and Irrigated Agriculture, Harvested Forest-Grass Regeneration, Harvested Forest-Herbaceous Regeneration, Introduced Upland Vegetation – Treed, North-Central Interior Dry Oak Forest & Woodland, North-Central Interior Dry-Mesic Oak Forest & Woodland, North-Central Interior Oak Savanna, North-Central Oak Barrens, Ruderal Forest, Ruderal Upland-Old Field.
LANDFIRE Biophysical Settings anticipated (USGS, 2010): North-Central Interior Oak Savanna, North-Central Interior Dry-Mesic Oak Forest and Woodland, North-Central Interior Dry Oak Forest and Woodland, North Central Oak Barrens.
Ecological site concept
This site is an upland site formed on glacial outwash and colluvium parent materials in soils that are well drained or drier. There are 3 distinct states: 1. tall grass savanna, 2. fire suppressed state, and 3. agriculture state. Fire frequency and intensity, along with windthrow, and occasional droughty conditions, were the disturbance mechanisms that developed and then maintained this site. Since settlement, more than 80% of this site has been converted to agriculture with the majority being row crop agriculture. The most common practice involves grain rotations between corn and soybeans.
Associated sites
F111XC009IN |
Overflow Lower in slope and lower on the landscape |
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R111XC001IN |
Sand Dune Higher on the landscape, drier, sandier, and black oak is the dominant species. |
Similar sites
R111XC001IN |
Sand Dune Higher on the landscape, drier, sandier, and black oak is the dominant species. |
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Table 1. Dominant plant species
Tree |
(1) Quercus velutina |
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Shrub |
Not specified |
Herbaceous |
(1) Andropogon gerardii |
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