LOCATION MANTACHIE MS+AL AR FL KY LA NC TN TX VAEstablished Series
TAXONOMIC CLASS: Fine-loamy, siliceous, active, acid, thermic Fluventic Endoaquepts
TYPICAL PEDON: Mantachie loam, on a 1 percent slope, in cropland. (Colors are for moist soil.)
Ap--0 to 5 inches; dark grayish brown (10YR 4/2) loam; weak fine granular structure; friable; common fine roots; few fine concretions of iron and manganese oxides; common fine distinct dark yellowish brown (10YR 4/4) masses of iron accumulation; slightly acid; abrupt smooth boundary. (3 to 8 inches thick)
A--5 to 11 inches; brown (10YR 4/3) fine sandy loam; weak fine granular structure; friable; few fine roots; few fine concretions of iron and manganese oxides; many fine and medium faint grayish brown (10YR 5/2) iron depletions; many fine and medium distinct light yellowish brown (10YR 6/4) masses of iron accumulation; very strongly acid; clear wavy boundary. (0 to 6 inches thick)
Bw1--11 to 15 inches; 40 percent grayish brown (10YR 5/2), 30 percent brown (10YR 4/3), and 30 percent dark yellowish brown (10YR 4/4) loam; weak fine subangular blocky structure; friable; few fine roots; few fine concretions of iron and manganese oxides; areas of grayish brown are iron depletions; areas of dark yellowish brown are masses of iron accumulation; very strongly acid; clear wavy boundary.
Bw2--15 to 19 inches; 60 percent strong brown (7.5YR 5/6) and 40 percent gray (10YR 5/1) loam; weak medium subangular blocky structure; friable; few fine roots; areas of gray are iron depletions; areas of strong brown are masses of iron accumulation; very strongly acid; gradual wavy boundary. (Combined thickness of the Bw horizon is 4 to 13 inches.)
Bg1--19 to 29 inches; gray (10YR 6/1) loam; weak medium subangular blocky structure; friable; few fine roots; many medium prominent strong brown (7.5YR 5/6) masses of iron accumulation; very strongly acid; gradual wavy boundary.
Bg2--29 to 48 inches; gray (10YR 5/1) loam; weak medium subangular blocky structure; friable; few fine roots; many medium prominent strong brown (7.5YR 5/6) and few fine prominent yellowish red (5YR 5/6) masses of iron accumulation; very strongly acid; gradual wavy boundary.
Bg3--48 to 61 inches; gray (10YR 6/1) loam; weak coarse subangular blocky structure; friable; few fine and medium concretions of iron and manganese oxides; many fine and medium prominent strong brown (7.5YR 5/6) and yellowish red (5YR 5/6) masses of iron accumulation; very strongly acid. (Combined thickness of the Bg horizon is 27 to 60 inches or more.)
TYPE LOCATION: Lee County, Mississippi; 14.0 miles northeast of Tupelo; 350 feet south of gravel road, 505 feet west and 330 feet south of the northeast corner of the NW1/4, SE1/4, sec. 1, T. 9 S., R. 6 E.
RANGE IN CHARACTERISTICS: The thickness of the solum ranges from 30 to more than 60 inches. Reaction is very strongly acid or strongly acid throughout the profile, except for surface layers that have been limed. Concretions and/or soft masses of iron and manganese oxides range from none to common throughout the profile. Content of gravel ranges from 0 to 10 percent, by volume, throughout the profile. Buried horizons, with colors and textures similar to those of the Bw or Bg horizons, occur in many pedons below a depth of 40 inches.
The A or Ap horizon commonly has hue of 10YR or 2.5Y, value of 3 to 5, and chroma of 1 to 4. Some pedons do not have a dominant matrix color and are multicolored in shades of brown and gray. Texture is clay loam, fine sandy loam, loam, sandy loam, or silt loam.
The Bw horizon commonly lacks a dominant matrix color and is multicolored in shades of gray, brown, red, and yellow; or it has hue of 10YR or 2.5Y, value of 4 to 6, and chroma of 3 to 8. Redoximorphic features in shades of gray, red, yellow, or brown are common or many. Texture is clay loam, sandy clay loam, or loam.
The Bg horizon has hue of 10YR or 2.5Y, value of 4 to 7, and chroma of 1 or 2. Redoximorphic features in shades of brown, yellow, gray, or red range from few to many. Texture is clay loam, sandy clay loam, or loam.
The Cg or C horizon, if it occurs, commonly has hue of 10YR or 2.5Y, value of 4 to 7, and chroma of 1 or 2. Redoximorphic features in shades of brown, yellow, gray, or red range from few to many. Texture is clay loam, sandy clay loam, loam, or sandy loam. Thin strata of finer- and coarser-textured material occur in many pedons.
COMPETING SERIES: There are no competing series in the same family. Closely related soils are the Enville, Iuka, and Mooreville series. Enville soils are coarse-loamy. Mooreville soils are moderately well drained. The moderately well drained Iuka soils are coarse-loamy.
GEOGRAPHIC SETTING: Mantachie soils are on flood plains of streams that drain areas of the Southern Coastal Plain Major Land Resource Area. They formed in loamy alluvium. Slopes range from 0 to 3 percent. Near the type location the mean annual temperature is about 63 degrees Fahrenheit, and the mean annual precipitation is about 53 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Iuka and Mooreville soils and the Bibb, Jena, Kinston, Kirkville, Ochlockonee and Riverview series. All of these soils are on the nearly lineal surfaces of flood plains. The poorly drained Bibb and Kinston soils are in depressed areas. The moderately well drained Iuka, Jena, and Mooreville soils, and the well drained Ochlockonee and Riverview soils are on higher parts of natural levees.
DRAINAGE AND PERMEABILITY: Mantachie soils are somewhat poorly drained. Runoff is slow, and permeability is moderate. These soils are subject to rare, occasional, or frequent flooding for brief to long duration, unless protected. The water table is within 1.0 to 1.5 feet of the surface during periods of high rainfall, generally in late winter and spring.
USE AND VEGETATION: Many areas of these soils have been cleared and are used for growing cotton, soybeans, corn, small grains, pasture, and hay. Some areas are in bottomland hardwoods or in loblolly or slash pine plantations. Common trees are green ash, eastern cottonwood, cherrybark oak, water oak, willow oak, loblolly pine, sweetgum, and yellow-poplar.
DISTRIBUTION AND EXTENT: Alabama, Arkansas, Florida, Kentucky, Louisiana, Mississippi, North Carolina, South Carolina, Tennessee, and Texas. The series is of large extent.
MLRA OFFICE RESPONSIBLE: Auburn, Alabama
SERIES ESTABLISHED: Prentiss County, Mississippi; 1950.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - the zone from the surface to a depth of about 5 inches (Ap horizon).
Fluventic features - (a) the zone from approximately 11 to 19 inches; have both a moist color value and chroma of 3 or more in 50 percent or more of the matrix (Bw1, Bw2 horizons); and (b) the zone from approximately 11 to 61 inches; have an irregular decrease in organic-carbon content (Bw and Bg horizons).
ADDITIONAL DATA: Laboratory data: Laboratory data for four pedons are from the Soil Gensis and Morphology Laboratory of the Mississippi Agricultural and Forestry Experiment Station, Mississippi State, Mississippi. Engineering test data for one pedon are published in Soil Survey of Lee County, Mississippi (issued March 1973) pp. 54-55.