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.
Major Land Resource Area (MLRA): 134X–Southern Mississippi Valley Loess
MLRA 134, Southern Mississippi Valley Loess, is in Mississippi (39 percent), Tennessee (23 percent), Louisiana (15 percent), Arkansas (11 percent), Kentucky (9 percent), Missouri (2 percent), and Illinois (1 percent). It makes up about 26,520 square miles (68,715 square kilometers). The northern part of the area includes Paducah and Murray, Kentucky; Paragould, Jonesboro, and Forrest City, Arkansas; and Memphis, Dyersburg, Bartlett, and Germantown, Tennessee. The southern part includes Yazoo City, Clinton, and Jackson, Mississippi, and Baton Rouge, Opelousas, Lafayette, and New Iberia, Louisiana. This portion is the farthest southeast part of the MLRA in Louisiana. It is in the Mississippi Valley Loess Plains Section of the EPA Ecoregions in sub-section 74c, Southern rolling Plains. The dissected plains in this MLRA have a loess mantle that is thick at the valley wall and thins rapidly as distance from the valley wall increases. Although less dissected than the Bluff Hills (74a), the region has more irregular and dissected topography than adjacent 74b to the north in Mississippi. The historic forests contained shortleaf pine, loblolly pine, and upland oaks and hickories. Pine is naturally more prevalent here than in 74a and 74b. Land cover now is mostly mixed pine-hardwood forest, pine plantations, pasture, and cropland. The eastern boundary of this region is broad, with a gradual transition to the southern Coastal Plains.
Major Land Resource Area (MLRA) and Land Resource Unit (LRU) (USDA-Natural Resources Conservation Service, 2006)
EPA Level IV Ecoregion
The Natural Communities of Louisiana - (Louisiana Natural Heritage Program - Louisiana Department of Wildlife and Fisheries)
Ecological site concept
Nearly Level Upland Terraces found on the lower elevations on local landscape, slopes can range up to above 6 percent in some areas but generally less than 1 percent. Drainage ranges from Moderately well to Somewhat poorly, with none to rare Flooding frequency. Some soils restrictions could include a brittle fragipan or a soils horizon with fragic properties and potentially soil sodium these restrictions when present will generally occur between 11 and 30 inches below the soil surface. The site is found in level IV EPA Ecoregion 74c, Southern Rolling Plains of the Mississippi Valley Loess Plains, within the Southern Mississippi Valley Loess Major Land Resource Area.
Southern Rolling Plains Loess Fragipan Upland - PROVISIONAL
134XY105 Southern Rolling Plains Loess Fragipan Upland is found in a similar site position however it is better drained with greater slope.
Baton Rouge Terrace Southern Loess Low Terrace - PROVISIONAL
134XY123 Baton Rouge Terrace Southern Loess Low Terrace is Similar in landscape position and wetness, however is found in the Baton Rouge Terrace Portion of the MLRA to the south of this site.
Table 1. Dominant plant species
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