LOCATION CARYTOWN MO+AR OKEstablished Series
TAXONOMIC CLASS: Fine, mixed, active, thermic Albic Natraqualfs
TYPICAL PEDON: Carytown silt loam - on less than one percent slope in pasture. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 9 inches; dark grayish brown (10YR 4/2) and dark gray (10YR 4/1) silt loam, light brownish gray (10YR 6/2) dry; weak thin platy structure; very friable; common worm channels and casts; common roots; few very fine chert fragments; slightly acid, gradual smooth boundary. (5 to 10 inches thick)
E--9 to 15 inches; grayish brown (10YR 5/2) silt loam; common medium faint light brownish gray (10YR 6/2) mottles; common medium faint dark brown (10YR 4/3) and dark yellowish brown (10YR 4/4) stains; weak thin platy structure; very friable; common roots; vesicular pores; common worm channels and casts; common small and medium dark concretions (oxides); medium acid; abrupt wavy boundary.
Btg1--15 to 18 inches; very dark grayish brown (10YR 3/2) clay; common fine prominent red (2.5YR 4/8) and a few fine faint dark gray (10YR 4/1), dark grayish brown (10YR 4/2) and very dark gray (10YR 3/1) mottles; weak coarse columnar structure parting to moderate fine and very fine angular blocky; extremely firm; few roots; many distinct clay films on faces of peds; few worm channels and casts; many fine dark concretions (oxides); few very fine fragments of chert; medium acid; gradual smooth boundary.
Btg2--18 to 25 inches; very dark grayish brown (2.5Y 3/2) and olive brown (2.5Y 4/4) clay; few fine distinct very dark gray (10YR 3/1) and fine prominent yellowish brown (10YR 5/8) mottles; moderate fine and very fine angular blocky structure; extremely firm; few roots; many distinct clay films on faces of peds; few fine dark concretions (oxides); few very fine fragments of chert; slightly acid; gradual smooth boundary.
Btg3--25 to 36 inches; olive brown (2.5Y 4/4) clay; few fine distinct very dark grayish brown (2.5Y 3/2) and prominent yellowish brown (10YR 5/8) mottles; moderate fine angular blocky structure; extremely firm; few roots; many distinct clay films on faces of peds; common slickensides; few fine dark concretions (oxides); slightly acid; gradual smooth boundary.
Btg4--36 to 48 inches; light olive brown (2.5Y 5/2) and grayish brown (2.5Y 5/4) clay; few fine distinct gray (5Y 5/1) and few fine prominent strong brown (7.5YR 5/8) mottles; weak fine and medium subangular and angular blocky structure; very firm; few roots; many distinct clay films on faces of peds; few fine dark concretions (oxides); neutral; gradual smooth boundary. (Combined thickness of the Bt horizons is 24 to 54 inches.)
Cg--48 to 72 inches; gray (5Y 5/1) silty clay loam; few fine faint gray (N 5/0 ) and dark gray (N 4/0 ) and few fine prominent strong brown (7.5YR 5/8) mottles; massive; few distinct clay films on vertical cleavage faces; mildly alkaline.
TYPE LOCATION: Barton County, Missouri; about 4 miles northwest of Golden City, Missouri; 875 feet east and 405 feet south of the northwest corner, sec. 19, T. 31 N., R. 29 W.
RANGE IN CHARACTERISTICS: Thickness of the solum ranges from 40 to more than 60 inches. Some pedons have carbonate concretions and gypsum crystals in the lower part.
The A horizon has hue of 10YR or 2.5Y, value of 3 or 4 moist and 5 or 6 dry, and chroma of 1 or 2. Horizons having moist value lower than 3.5 are less than 6 inches thick. The E horizon has hue of 10YR or 2.5Y, value of 4 to 6, and chroma of 2 to 3. Typically, this horizon is mottled with colors of lower value and higher chroma. Reaction ranges from strongly acid to neutral.
The Bt horizon has 10YR or 2.5Y hue, value of 3 or 4, and chroma of 1 to 4. Either the coatings of the ped or the matrix of the Bt horizon has dominant chromas of 2 or less. The upper 20 inches of the Bt horizon average between 40 and 60 percent clay. To a depth of about 36 inches, it ranges from medium acid to moderately alkaline, and below this depth from neutral to strongly alkaline.
COMPETING SERIES: There are no other series in the same family. Similar series in other families are the Bonn, Huey, Lafe, McCrory, and Verdun soils. Bonn, Huey, Lafe, McCrory, and Verdun soils have less clayey Bt horizons. In addition, the Bonn, Lafe, McCrory, and Verdun have albic horizons that tongue or interfinger into the natric horizon.
GEOGRAPHIC SETTING: The Carytown soils are on upland or terrace flats and depressions. Slope gradients are less than 2 percent. The soils are formed in sodium rich medium and fine textured residuum from shale or old alluvium, colluvium, or loess. Mean annual temperature ranges from 57 to 63 degrees F, and mean annual precipitation ranges from 35 to 45 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Parsons, Gerald, Lanton, Summit, Creldon, and Keeno soils, all of which lack 15 percent sodium in any part of the argillic horizon and are acid in the lower part of the sola. The Parsons, Gerald, Creldon, and Keeno soils are on higher positions. Lanton soils are on flood plains. Summit soils are on slopes either above or below the Carytown soils.
DRAINAGE AND PERMEABILITY: Poorly drained. Permeability is very slow and runoff is slow.
USE AND VEGETATION: About half of these soils are in pasture or hay and the remainder is cropped to corn, wheat, soybeans, and sorghums. Native vegetation was tall prairie grasses and scattered hardwoods.
DISTRIBUTION AND EXTENT: Southwestern Missouri, northeastern Oklahoma, and northwestern Arkansas. The series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Denver, Colorado
SERIES ESTABLISHED: Jasper County, Missouri, 1948.
REMARKS: More study is needed to determine if part or all of the argillic horizon has 15 percent sodium measured with ammonium acetate. The upper part of the Bt horizon has 16 percent exchangeable sodium measured by ammonium acetate at pH 7.0. The C horizon was measured by the same method and has 15 percent exchangeable sodium. It is borderline to a Typic subgroup, but will not be changed with limited laboratory data and most areas have been mapped.
Diagnostic horizons and features recognized in this series are: ochric epipedon - the zone from the surface of the soil to a depth of 15 inches (Ap and E horizons); albic horizons the zone from approximately 9 to 15 inches (E horizon); natric horizon - the zone from approximately 15 to 48 inches (Bt1, Bt2, Bt3, and Btg horizons); aquic moisture regime.