LOCATION KIRKVILLE MS+AL AR

Established Series
Rev. WIS: RBH; GRB
10/2018

KIRKVILLE SERIES

The Kirkville series consists of very deep, moderately well drained, moderately permeable soils on flood plains of the Blackland Prairie Major Land Resource Area (MLRA 135). They formed in loamy alluvium. Near the type location, the mean annual temperature is about 63 degrees F., and the mean annual rainfall is about 53 inches. Slopes range from 0 to 2 percent.

TAXONOMIC CLASS: Coarse-loamy, siliceous, active, thermic Fluvaquentic Dystrudepts

TYPICAL PEDON: Kirkville loam, in a nearly level pasture (Colors are for moist soil).

Ap--0 to 5 inches; dark grayish brown (10YR 4/2) loam; weak fine and medium granular structure; friable; common fine roots; few fine faint grayish brown (10YR 5/2) areas of iron depletions; strongly acid; clear wavy boundary. (4 to 9 inches thick)

A--5 to 9 inches; brown (10YR 4/3) loam; weak medium granular structure; friable; few fine roots; common fine black (10YR 2/1) spots and accretions; common fine faint grayish brown (10YR 5/2) areas of iron depletions; very strongly acid; clear wavy boundary. (0 to 6 inches thick)

Bw1--9 to 14 inches; brown (10YR 4/3) loam; weak coarse subangular blocky structure; very friable; few fine roots; common fine pores; few worm casts; few medium distinct yellowish brown (10YR 5/4) areas of iron depletions; very strongly acid; clear wavy boundary.

Bw2--14 to 29 inches; brown (10YR 4/3) sandy loam; weak coarse subangular blocky structure; friable; few fine roots; common fine pores; common medium faint grayish brown (10YR 5/2) areas of iron depletions and common fine distinct yellowish red (5YR 4/6) masses of iron accumulation; very strongly acid; clear wavy boundary. (Combined thickness of the Bw subhorizons ranges from 14 to 56 inches in thickness)

Bg1--29 to 43 inches; grayish brown (10YR 5/2) sandy loam; weak medium and coarse subangular blocky structure; friable; few fine roots; few fine pores; few fine soft red accretions; many coarse distinct yellowish brown (10YR 5/6) and strong brown (7.5YR 5/6) masses of iron accumulations; very strongly acid; gradual wavy boundary.

Bg2--43 to 61 inches; gray (10YR 6/1) sandy loam; weak medium subangular blocky structure; friable; few fine roots; few fine soft red accretions; few fine pores; many medium and coarse distinct strong brown (7.5YR 5/6) and yellowish brown (10YR 5/8) masses of iron accumulations; very strongly acid; gradual wavy boundary. (Combined thickness of the Bg horizons range from 0 to 50 inches in thickness)

Cg--61 to 72 inches; 34 percent gray (10YR 6/1), 33 percent strong brown (7.5YR 5/6) and 33 percent yellowish brown (10YR 5/8) sandy loam; structureless; very friable; few fine soft brown (10YR 4/3) accretions; the areas of gray are iron depletions and the areas of strong brown and yellowish brown are iron accumulations; very strongly acid.

TYPE LOCATION: Itawamba County, Mississippi. Approximately 9.0 miles east of Saltillo, Mississippi and about 550 feet south and 50 feet east of the northwest corner of NE1/4, SW1/4, Sec. 14, T. 8 S., R. 7 E.

RANGE IN CHARACTERISTICS: Solum thickness ranges from 30 to more than 60 inches. Soft accretions of material and concretions range from none to many throughout the profile. Reaction is very strongly acid or strongly acid throughout, except where the surface has been limed.

The A or Ap horizon has hue of 7.5YR to 2.5Y, value of 4 or 5, and chroma of 2 to 4, and chroma of 4. Texture is loamy sand, sandy loam, silt loam, loam, fine sandy loam.

The upper part of the Bw horizon has hue of 7.5YR to 2.5Y, value of 4 to 6, and chroma of 3 to 6. Redoximorphic features in shades of yellow and brown range from few to many. Texture is sandy loam, fine sandy loam, silt loam or loam.

The lower part of the Bw horizon has hue of 7.5YR to 2.5Y, value of 4 or 6, and chroma of 3 to 6; or there Is no dominant color and it is multicolored in shades of yellow, brown and gray. Redoximorphic features in shades of yellow, brown and gray range from few to many. Texture is sandy loam, fine sandy loam, silt loam or loam.

The Bg horizon, where present, has hue of 10YR or 2.5Y, value of 5 or 6, and chroma of 2 or less. Texture is loam, sandy loam, fine sandy loam, silt loam or loam.

The Cg horizon, where present, has hue of 10YR or 2.5Y, value of 5 or 6, and chroma of 2 or less; or there is no dominant color and is multicolored in shades of gray or brown. Texture is fine sandy loam, sandy loam, silt loam or loam.

COMPETING SERIES: The Iulus series is the only known series in the same family. Iulus soils are in the Western Coastal Plain Major Land Resource Area (MLRA 133B).

GEOGRAPHIC SETTING: Kirkville soils are on nearly level flood plains in the Blackland Prairie. They formed in loamy alluvium. Slopes range from 0 to 2 percent. The climate is humid subtropical. Near the type location, the mean annual temperature is 63 degrees F., and the mean annual precipitation is 53 inches.

GEOGRAPHICALLY ASSOCIATED SOILS: These include the Cascilla, Iuka, Jena, Mantachie, Nugent and Ochlockonee. All of these are on the nearly linear surfaces of flood plains. The Cascilla, Jena, Nugent and Ochlockonee soils are on slightly higher natural levees near stream channels and the Cascilla, Jena and Ochlockonee are well drained. In addition, Cascilla soils have fine-silty control sections. The excessively drained Nugent soils have sandy control sections and thin bedding planes of finer material in the upper 20 inches, Ochlockonee soils are structureless and have thin bedding planes in the upper 20 inches. Iuka soils are on similar positions but have stratification and are structureless. The somewhat poorly drained Mantachie soils are on slightly lower positions and have fine-loamy control sections.

DRAINAGE AND PERMEABILITY: Moderately well drained; runoff is slow; permeability is moderate.

USE AND VEGETATION: Most areas of Kirkville soils are used for crops and pasture. Common crops are cotton, corn, soybeans and oats. The native vegetation is dominated by bottomland hardwoods. Common trees are cherrybark oak, sweetgum, water oak, eastern cottonwood, yellow poplar with some intermingled loblolly pine.

DISTRIBUTION AND EXTENT: Mississippi, Alabama, and Arkansas. The series is of moderate extent.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Auburn, Alabama.

SERIES ESTABLISHED: Jefferson Davis County, Mississippi; 1972.

REMARKS: Diagnostic horizons and features recognized in this pedon:

Ochric epipedon - the zone from the surface to a depth of about 9 inches (Ap and A horizons).

Cambic horizon - the zone from 9 inches to 61 inches (Bw1, Bw2, Bg1 and Bg2 horizons).

Fluvaquentic features - redoximorphic depletions with chroma of 2 or less within 20 inches of the soil surface (Bw2 horizon).

Kirkville soil are flooded for brief to long duration one or two times a year from January through April unless protected, the seasonal high water table is at a depth of 18 to 30 inches from January through April.

Kirkville soils are in MLRA 135.

ADDITIONAL DATA: Laboratory data for the typical pedon are from the Soil Survey Laboratory, Beltsville, MD. (MS65418-65425). Physical data for one pedon published in Soil Survey of Tishmingo County, Mississippi (issued October 1983, p. 91)

National Cooperative Soil Survey
U.S.A.