LOCATION SCHOLTEN MOEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, siliceous, active, mesic Typic Fragiudults
TYPICAL PEDON: Scholten gravelly silt loam - on a northeast facing convex slope of 6 percent in pasture at an elevation of 1,485 feet. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 6 inches; dark grayish brown (10YR 4/2) and brown (10YR 4/3) gravelly silt loam, light brownish gray (10YR 6/2) dry; weak very fine granular structure; very friable; many fine roots; 25 percent chert gravel; neutral; abrupt smooth boundary. (3 to 8 inches thick)
E--6 to 9 inches; light yellowish brown (10YR 6/4) and yellowish brown (10YR 5/4) gravelly silt loam; weak fine platy structure; very friable; common very fine roots; 30 percent chert gravel; neutral; clear wavy boundary. (0 to 6 inches thick)
Bt--9 to 24 inches; yellowish brown (10YR 5/6) very gravelly silty clay loam; moderate fine subangular blocky structure; friable; many fine roots; few faint clay films on faces of peds; 45 percent chert gravel; extremely acid; clear smooth boundary. (5 to l8 inches thick)
2Btx--24 to 33 inches; mottled pale brown (10YR 6/3), light brownish gray (10YR 6/2), strong brown (7.5YR 5/6), and dark red (2.5YR 3/6) very gravelly silt loam; weak fine and medium platy structure; very firm; about 70 percent brittleness; 55 percent chert gravel; extremely acid; abrupt smooth boundary. (6 to 36 inches thick)
3Bt--33 to 60 inches; dark red (2.5YR 3/6) gravelly clay; moderate angular blocky structure; firm; common distinct clay films on faces of peds; common fine prominent light gray (10YR 7/1) and prominent light brownish gray (10YR 6/2) iron depletions; 20 percent chert gravel; extremely acid.
TYPE LOCATION: Barry County, Missouri; about 1 mile northwest of the community of Butterfield or 500 feet south and 1,550 feet west of the northeast corner of sec. 35, T. 24 N., R. 28 W; USGS Purdy, Missouri quadrangle.
RANGE IN CHARACTERISTICS:
Depth to Bedrock: greater than 80 inches
Depth to fragipan: 14 to 36 inches
Particle size control section: averages 35 to 65 percent rock fragments.
A or Ap horizon
Hue: 10YR
Value: 3 to 5
Chroma: 2 or 3
Fine-earth: silt loam, loam, or silt
Total rock fragments: 5 to 65 percent; 5 to 65 percent gravel and 0 to 5 percent cobbles
Reaction: extremely acid to neutral
Note: Where the color value is less than 3.5, the thickness is less than 6 inches.
E horizon
Hue: 10YR
Value: 4 to 6
Chroma: 2 to 4
Fine-earth: silt loam, silt, or loam
Total rock fragments: 10 to 65 percent; 10 to 65 percent gravel and 0 to 10 percent cobbles
Reaction: extremely acid to neutral
BE horizon (where present)
Hue: 10YR
Value: 4 or 5
Chroma: 2 to 6
Fine-earth: silt loam or silt
Total rock fragments: 10 to 65 percent; 10 to 65 percent gravel and 0 to 10 percent cobbles
Reaction: strongly acid to slightly acid
Bt horizon
Hue: 5YR to 10YR
Value: 4 to 6
Chroma: 3 to 6
Fine-earth: silt loam, loam, clay loam, or silty clay loam
Total rock fragments: 10 to 75 percent; 10 to 75 percent gravel and 0 to 20 percent cobbles
Reaction: extremely acid to neutral
Note: Some pedons have clay depletions with chroma 2 or less in the lower Bt horizon.
2Bx, Btx or 2Btx horizon
Hue: 2.5YR to 10YR
Value: 4 to 6
Chroma: 3 to 6
Clay depletions and gray seams
Value: 5 to 7
Chroma: 1 or 2
Fine-earth: silt loam, loam, clay loam, or silty clay loam
Total rock fragments: 15 to 85 percent; 15 to 85 percent gravel and 0 to 30 percent cobbles
Reaction: moderately acid to extremely acid
3Bt or 4Bt horizon
Hue: 10R to 10YR
Value: 3 to 6
Chroma: 4 to 8
Fine-earth: silty clay, clay, silty clay loam, or clay loam
Total rock fragments: 15 to 85 percent; 10 to 85 percent gravel and 0 to 25 percent cobbles
Reaction: extremely acid to strongly acid
COMPETING SERIES: There are no other series in the same family. Similar soils include the Keeno, Nixa, and Wilderness series. Keeno and Wilderness soils have more than 35 percent base saturation at the critical depth. Keeno soils also have a mollic epipedon. Nixa soils do not have an argillic horizon above the fragipan.
GEOGRAPHIC SETTING: The Scholten soils are on slopes and ridges on a rolling to gently rolling landscape at the heads of drains. These soils formed in colluvium and the underlying residuum weathered from cherty limestone. Slopes are 1 to 45 percent. The mean annual temperature ranges from 55 to 58 degrees F, and mean annual precipitation ranges from 40 to 46 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Clarksville, Captina, Needleye, and Tonti series. The Clarksville soils are on steeper side slopes and do not have a fragipan. The Captina, Needleye, and Tonti soils are on the more gently sloping wider ridgetops upslope from Scholten soils and do not have high chert content in the series control section.
DRAINAGE AND PERMEABILITY: Moderately well drained. Runoff potential is very high. Permeability is moderate above the fragipan, very slow in the fragipan, and moderately rapid below the fragipan. The saturated hydraulic conductivity is moderately high above the fragipan, low in the fragipan, and high below the fragipan.
USE AND VEGETATION: Most areas of these soils are in grass used for pasture or hayland. Native vegetation is mixed hardwoods dominated by oak and hickory.
DISTRIBUTION AND EXTENT: The Ozarks area (MLRAs 116B and 116B) of southern Missouri.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia
SERIES ESTABLISHED: Webster County, Missouri, 1988.
REMARKS: Diagnostic horizons and features recognized in this series are:
ochric epipedon - the zone from the surface of the soil to a depth of 9 inches (Ap and E horizons);
argillic horizon - the zone from about 9 to 24 inches and 33 to 60 inches (Bt and 2Bt horizons);
fragipan - the zone from approximately 24 to 33 inches (Bx horizon).