LOCATION MANTACHIE MS+AL AR FL KY LA NC TN TX VA

Established Series
Rev. WIS: RBH; PGM; GRB
09/2013

MANTACHIE SERIES

The Mantachie series consists of very deep, somewhat poorly drained, moderately permeable soils on flood plains of the Southern Coastal Plain (MLRA 133A). They formed in loamy alluvium. Near the type location, the mean annual temperature is about 63 degrees F., and the mean annual precipitation is about 53 inches. Slope is dominantly less than 1 percent but ranges up to 3 percent.

TAXONOMIC CLASS: Fine-loamy, siliceous, active, acid, thermic Fluventic Endoaquepts

TYPICAL PEDON: Mantachie fine sandy loam, in cropland on a 1 percent slope (Colors are for moist soil).

Ap--0 to 5 inches; dark grayish brown (10YR 4/2) fine sandy 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 7 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 ranges from 4 to 23 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 ranges from 27 to 80 inches or more.)

TYPE LOCATION: Lee County, Mississippi. Approximately 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 has hue of 10YR or 2.5Y, value of 3 to 5, and chroma of 1 to 4. Redoximorphic features in shades of yellow, brown or gray range from few to many. Some pedons do not have a dominant matrix color and are multicolored in shades of brown and gray. Texture is fine sandy loam, sandy loam, loam, silt loam, sandy clay loam or clay 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 7.5YR to 2.5Y, value of 4 to 6, and chroma of 3 to 8. Redoximorphic features in shades of gray, red, yellow or brown are few to many. Texture is loam, sandy clay loam or clay 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 loam, sandy clay loam or clay loam.

The Cg or C horizon, where present, it 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 fine sandy loam, sandy loam, loam, sandy clay loam or clay loam. Thin strata ranging from sand to clay material occur in many pedons.

COMPETING SERIES: There are no competing series in the same family.

GEOGRAPHIC SETTING: Mantachie soils are on flood plains of streams that drain areas of the Southern Coastal Plain. They formed in loamy alluvium. The climate is humid subtropical. 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 Bibb, Iuka, Jena, Kinston, Kirkville, Mimms, Mooreville, 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. In addition, Bibb soils have coarse-loamy control sections. The moderately well drained Iuka, Jena, Kirkville and Mooreville soils and the well-drained Ochlockonee and Riverview soils are on higher parts of natural levees. The poorly drained Mimms soils are on lower depressional areas, have more clay in the control sections and are kaolinitic. Mooreville soils are moderately well drained. In addition, Iuka, Kirkville and Ochlockonee soils have coarse-loamy control sections.

DRAINAGE AND PERMEABILITY: Somewhat poorly drained. Runoff is slow, and permeability is moderate.

USE AND VEGETATION: Many areas of Mantachie 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 SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Auburn, Alabama.

SERIES ESTABLISHED: Prentiss County, Mississippi; 1950.

REMARKS: Diagnostic horizons and features recognized in this pedon:

Ochric epipedon - the zone from the surface to a depth of about 5 inches (Ap horizon).

Cambic Horizon - the zone from 11 to 19 inches (Bw2 and Bw2 horizons).

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).

Mantachie soils are subject to rare to frequent flooding in the winter and early spring for brief to long duration, unless protected. The seasonal high water table ranges from 1.0 to 1.5 feet of the surface during periods of high rainfall.

Mantachie soils are in MLRA 133A.

ADDITIONAL DATA: Laboratory data is available on the National Soil Survey website at: http://ncsslabdatamart.sc.egov.usda.gov/querypage.aspx

Laboratory data was provided by Auburn University, Soil Characterization Laboratory, Auburn AL and the National Soil Survey Laboratory, Lincoln, NE.

Laboratory data for four pedons are from the Soil Genesis 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.

National Cooperative Soil Survey
U.S.A.