LOCATION MCKAMIE LA+AR OK TXEstablished Series
TAXONOMIC CLASS: Fine, mixed, superactive, thermic Vertic Hapludalfs
TYPICAL PEDON: McKamie are fine sandy loam - woodland. (Colors are for moist soils unless otherwise stated.)
A--0 to 4 inches; brown (7.5YR 4/3) silty clay loam; moderate fine granular structure; friable, moderately sticky, moderately plastic; many medium roots throughout and many medium roots throughout; moderately acid; clear smooth boundary. (2 to 6 inches thick)
Btss1--4 to 10 inches; yellowish red (5YR 4/6) clay; moderate medium prismatic parting to moderate medium angular blocky structure; firm, very sticky, very plastic; many medium roots throughout; 25 percent discontinuous faint red (2.5YR 4/6) clay films on faces of peds and 10 percent discontinuous distinct pressure faces on faces of peds and 5 percent discontinuous distinct slickensides (pedogenic); 4 percent medium prominent irregular very dark gray (10YR 3/1) manganese coatings on faces of peds; moderately acid; gradual smooth boundary.
Btss2--10 to 21 inches; red (2.5YR 4/6) clay; moderate medium prismatic parting to moderate medium angular blocky structure; firm, very sticky, very plastic; many fine roots throughout; 25 percent discontinuous faint red (2.5YR 4/6) clay films on faces of peds and 10 percent discontinuous distinct pressure faces on faces of peds and 5 percent discontinuous distinct slickensides (pedogenic) and discontinuous distinct dark grayish brown (10YR 4/2) organic stains on faces of peds; 2 percent medium prominent irregular very dark gray (10YR 3/1) manganese coatings on faces of peds; neutral; gradual smooth boundary.
Bt--21 to 31 inches; red (2.5YR 4/6) clay; moderate medium subangular blocky structure; firm, very sticky, very plastic; many fine roots throughout and many medium roots throughout; 25 percent discontinuous faint red (2.5YR 4/6) clay films on faces of peds; 1 percent fine prominent irregular very dark gray (10YR 3/1) manganese coatings on faces of peds; slightly alkaline; clear smooth boundary. (Combined clayey Btss and Bt horizons are 20 to 30 inches thick)
Btk--31 to 45 inches; yellowish red (5YR 5/6) silt loam; weak medium subangular blocky parting to weak coarse prismatic structure; friable, nonsticky, very plastic; common fine roots throughout; common fine low continuity tubular pores; 3 percent discontinuous faint red (2.5YR 4/6) clay films on faces of peds; 1 percent fine prominent irregular very dark gray (10YR 3/1) manganese coatings on faces of peds; slightly alkaline; gradual smooth boundary.
Bt'1--45 to 53 inches; yellowish red (5YR 5/6) silt loam; weak medium subangular blocky parting to weak coarse prismatic structure; friable, nonsticky, nonplastic; common fine roots throughout; common fine low continuity tubular pores; 2 percent discontinuous faint red (2.5YR 4/6) clay films on faces of peds; 1 percent fine prominent irregular very dark gray (10YR 3/1) manganese coatings on faces of peds; slightly alkaline; gradual smooth boundary.
Bt'2--53 to 59 inches; yellowish red (5YR 5/6) silt loam; weak medium subangular blocky parting to weak coarse prismatic structure; friable, nonsticky, nonplastic; common fine roots throughout; 2 percent discontinuous faint red (2.5YR 4/6) clay films on faces of peds; 1 percent fine prominent irregular very dark gray (10YR 3/1) manganese coatings on faces of peds; slightly alkaline; gradual smooth boundary.
Btk'--59 to 63 inches; yellowish red (5YR 5/6) very fine sandy loam; weak fine platy structure; friable, nonsticky, nonplastic; common fine roots throughout; common very fine low continuity tubular pores; 2 percent discontinuous faint yellowish red (5YR 4/6) clay films on faces of peds; 1 percent fine prominent irregular very dark gray (10YR 3/1) manganese coatings on faces of peds; 1 percent fine prominent irregular light gray (10YR 7/2) carbonate masses throughout; moderately alkaline; abrupt smooth boundary. (Combined thicknessof the Bt ang Btk horizons is 26 to 60 inches)
BCk--63 to 64 inches; red (2.5YR 4/6) silty clay loam; weak fine platy structure; firm, slightly sticky, nonplastic; common fine roots throughout; common very fine low continuity tubular pores; 15 percent fine prominent platy very dark gray (10YR 3/1) manganese coatings on horizontal faces of peds; 2 percent medium prominent irregular light gray (10YR 7/2) carbonate masses throughout; moderately alkaline; abrupt smooth boundary. (0 to 12 inches thick)
C1--64 to 72 inches; reddish yellow (5YR 6/6) and yellowish red (5YR 5/6) stratified very fine sandy loam; weak fine platy structure; friable, nonsticky, slightly plastic; common fine roots throughout; common very fine low continuity tubular pores; 1 percent fine prominent platy very dark gray (10YR 3/1) manganese coatings on horizontal faces of peds; slightly alkaline; abrupt smooth boundary.
C2--72 to 77 inches; yellowish red (5YR 5/6) and red (2.5YR 4/6) stratified very fine sandy loam to silty clay loam; weak fine platy structure; firm, slightly sticky, nonplastic; common fine roots throughout; 10 percent fine prominent platy black (10YR 2/1) manganese coatings on horizontal faces of peds; 1 percent fine prominent dendritic pale brown (10YR 6/3) iron depletions lining pores; slightly alkaline; abrupt smooth boundary.
C3--77 to 80 inches; reddish yellow (5YR 6/6) and red (2.5YR 4/6) stratified silty clay loam to silty clay; weak fine platy structure; firm, slightly sticky, slightly plastic; common fine roots throughout; 10 percent fine prominent platy black (10YR 2/1) manganese coatings on horizontal faces of peds; slightly alkaline; abrupt smooth boundary.
C4--80 to 84 inches; reddish yellow (5YR 6/6) and yellowish red (5YR 4/6) stratified very fine sandy loam; weak fine platy structure; very friable, nonsticky, nonplastic; common fine roots throughout; common fine low continuity tubular pores; 3 percent fine prominent platy very dark gray (10YR 3/1) manganese coatings on horizontal faces of peds; slightly alkaline; abrupt smooth boundary.
C5--84 to 87 inches; reddish yellow (5YR 6/6) and yellowish red (5YR 5/6) stratified very fine sandy loam; weak fine platy structure; very friable, nonsticky, nonplastic; slightly alkaline smooth boundary.
TYPE LOCATION: Bossier Parish, Louisiana; located about 12 miles south from the intersection with La. Highway 162 in Benton, La. on La. Highway 3 to the intersection of U.S. Highway 80 in Bossier City, La,; 6.6 miles east on U.S. Highway 79 to Red Chute, La., then 1.7 miles north on Belleview Road to pipeline access road, then 0.95 mile northwest to pipeline pumping station, then 1,750 feet west along powerline right of way, then 100 feet south into woods; SE1/4, SE1/4 Sec. 32, T. 19 N., R. 12 W., Latitude 32 degrees, 35 minutes, 17.96 seconds N., and
Longitude 93 degrees, 37 minutes, 10.59 seconds W., Bossier City, Louisiana USGS 7.5 Minute Quadrangle.
RANGE IN CHARACTERISTICS:
Solum thickness: 36 to 60 inches
Clay content in the Control Section: 35 to 60 percent
Redoximorphic features: Black manganese coatings and stains, and iron and manganese depletions in the subsoil and substratum
Other distinctive soil features: Slickensides and pressure faces in the upper part of the subsoil in some pedons.
Concentrated minerals: Secondary carbonates in the lower part of the solum
A or Ap horizon:
Color=Hue of 10YR or 7.5YR, value of 4 or 5, and chroma of 2 or 3.
Redoximorphic features= None
Texture=Very fine sandy loam, silty clay loam, fine sandy loam or silt loam
Other features=
Reaction=Strongly acid to slightly acid
E horizon: (where present)
Color=Hue of 10YR or 7.5YR, value of 5 to 7 and chroma of 2 to 4.
Redoximorphic features=None
Texture=Silt loam or very fine sandy loam
Other features=
Reaction=Strongly acid to slightly acid
Thickness=0 to 10 inches
Btss or upper part of the Bt horizon:
Color=Hue of 2.5YR or 5YR, value of 3 to 5, and chroma of 4 through 8.
Redoximorphic features=Black manganese coatings and stains
Texture=Clay
Other features=Slickensides are present in the upper part in some pedons.
Reaction=Very strongly acid to moderately acid in the upper part, but in some pedons it is alkaline or calcareous below about 30 inches.
Lower part of the Bt or Btk horizon:
Color=Hue of 2.5YR or 5YR, value of 3 to 5, and chroma of 4 through 8.
Redoximorphic features=Black manganese coatings and stains
Texture=Clay to very fine sandy loam
Other features=Lenses of coarser-textured material are common. Secondary carbonates are present in some pedons.
Reaction=Very strongly acid to moderately alkaline or calcareous.
BC horizon: (where present)
Color=Hue of 2.5YR or 5YR, value of 3 to 5, and chroma of 4 through 8.
Redoximorphic features=Black manganese coatings and stains, and iron and manganese depletions are few to common
Texture=Clay to very fine sandy loam
Other features=Lenses of coarser-textured material are common. Secondary carbonates are present in some pedons.
Reaction=Very strongly acid to moderately alkaline
2C horizon:
Color=Hue of 5YR or 2.5YR, value of 4 to 6 and chroma of 4 through 8
Redoximorphic features=Black manganese coatings and stains, and iron and manganese depletions are few to common.
Texture=Stratified layers of dominantly clay loam, silty clay loam, silt loam, and very fine sandy loam. Thickness of individual strata is variable.
Other features=None
Reaction=Very strongly acid to moderately alkaline
COMPETING SERIES: The Gladdice and White Store series are in the same family. Similar series are Boswell, Gore, Kolin, Mecklenburg, Morse, and Shubuta. Gladdice soils formed in residuum weathered from limestone. White Store soils are on Piedmont uplands and are underlain by Triassic rocks. Boswell soils have a lower base saturation and more gray iron depletions in the lower part of the B horizon. Gore soils have distinct or prominent redoximorphic features throughout. Kolin soils have intrusions of E material within the B horizon. Mecklenburg soils have lower base saturation. Morse soils are calcareous throughout. Shubuta soils have base saturation of less than 35 percent.
GEOGRAPHIC SETTING: These soils are on gently sloping to moderately steep dissected stream terraces of Pleistocene age. Dominant slopes ranges from 1 to 8 percent, but some slopes are as steep as 20 percent. McKamie soils formed in red clayey alluvium most likely washed from Permian red beds and associated sediments. Climate is warm and humid, mean annual precipitation is 48 inches, and mean annual temperature is 64 degrees F. near the type location.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Muskogee soils as well as the competing Gore and Morse soils. Muskogee soils have yellowish brown silty clay loam upper Bt horizons.
DRAINAGE AND PERMEABILITY: Well drained; medium to very rapid surface runoff; very slow permeability.
USE AND VEGETATION: A small part is used for growing crops and pasture. Most of the soil is in forest. Forest plantations are mostly of pine.
DISTRIBUTION AND EXTENT: Louisiana, southern Arkansas, eastern Oklahoma, and eastern Texas. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Bossier Parish, Louisiana; 1959.
REMARKS: The series was retypified at a new site in Bossier Parish that was sampled for NSSL analyses in 2000 (S00LA-015-003). The surface texture was determined to be silty clay loam through additional sampling. The series was also updated in 2004 to add value 5 to the range in characteristics for the Bt and BC horizons, and to allow loamy textures in the lower part of the subsoil below the control section.