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
Deep Loess Upland site having 0 to 12 percent Slopes and few restrictions for productivity in the soil. This site is found on the summits and interfluves in the dissected uplands found in level IV EPA Ecoregion 74a, Bluff Hills of the Mississippi Valley Loess Plains, within the Southern Mississippi Valley Loess Major Land Resource Area, south of the Big Black River in Mississippi and extending to LA. This site is also found in the Sicily Island area of the MLRA.
Southern Deep Loess Backslope - PROVISIONAL
Southern Deep Loess Backslope is differentiated from this site by slopes greater than 12%.
Southern Rolling Plains Loess Fragipan Upland - PROVISIONAL
Southern Rolling Plains Loess Fragipan Upland will be in a similar site position, however the root restriction will be due to Fragic properties in the soil.
Southern Rolling Plains Thin Loess Upland - PROVISIONAL
Southern Rolling Plains Thin Loess Upland will be in a similar site position, however it will have a thinner loess surface of the soil.
Table 1. Dominant plant species
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