LOCATION DEEPWATER MO+KSEstablished Series
TAXONOMIC CLASS: Fine-silty, mixed, superactive, thermic Typic Argiudolls
TYPICAL PEDON: Deepwater silt loam - on a 3 percent convex east-facing slope in pasture. (Colors are for moist soil unless otherwise stated.)
A--0 to 14 inches; very dark grayish brown (10YR 3/2) silt loam; grayish brown (10YR 5/2) dry; moderate medium granular structure; friable; many fine roots; neutral; clear smooth boundary. (10 to 18 inches thick)
BA--14 to 18 inches; dark brown (10YR 4/3) silt loam; weak fine subangular blocky structure; friable; common fine roots; medium acid; clear smooth boundary. (0 to 6 inches thick)
Bt1--18 to 23 inches; brown (10YR 5/3) silty clay loam; moderate fine subangular blocky structure; friable; few fine roots; few faint clay films on faces of peds; patchy pale brown (10YR 6/3) silt coatings on faces of peds; few fine black concretions (oxides); strongly acid; clear smooth boundary.
Bt2--23 to 28 inches; brown (10YR 4/3) silty clay loam; moderate medium subangular blocky structure; firm; many faint clay films on faces of peds; few fine black concretions (oxides); strongly acid; clear smooth boundary.
Bt3--28 to 46 inches; mottled light yellowish brown (10YR 6/4) and light gray (10YR 7/2) silty clay loam; moderate medium subangular blocky structure; firm; many faint clay films on faces of peds; medium acid; gradual smooth boundary. (Combined thickness of the Bt horizons is 24 to 60 inches.)
BC--46 to 62 inches; mottled light brownish gray (10YR 6/2) and yellowish brown (10YR 5/6) silty clay loam; moderate medium subangular blocky structure; firm; 5 percent shale fragments; slightly acid.
TYPE LOCATION: Henry County, Missouri; west side of road, 50 feet north and 1320 feet west of the southeast corner, sec. 33, T. 42 N., R. 26 W.
RANGE IN CHARACTERISTICS: Solum thickness typically is 48 to 72 inches. Depth to bedrock is greater than 6 feet. The mollic epipedon ranges from 10 to 24 inches in thickness. Reaction in the solum ranges from strongly acid to neutral in the upper part and strongly acid to slightly acid in the lower part.
The A or Ap horizon has hue of 10YR; value of 2 or 3, 4 or 5 dry; and chroma of 1 to 3. The BA horizon has a hue of 10YR, value of 3 or 4, and chroma of 2 or 3. Textures are silt loam or silty clay loam and less commonly loam.
The upper part of the Bt horizon has hue of 10YR or 7.5YR, value of 4 or 5, and chroma of 3 to 6. The lower part of the Bt horizon and the BC horizon have hue of 10YR or 7.5YR, value of 4 to 7, and chroma of 2 to 6 and typically are mottled. The upper 20 inches of the argillic horizon averages between 28 and 35 percent clay and is silty clay loam or clay loam. The lower part of the B horizon commonly is silty clay loam or clay loam and commonly contains up to 10 percent by volume fine shale fragments.
COMPETING SERIES These are the Caspiana, Catoosa, Dardanelle, Lula, Mason, Mer Rouge, and Tiptonville series of the same family and the Barden, Dennis, Fitzhugh, Hartwell, and Parsons series. Caspiana soils have 5YR or redder hue in the B horizon. Catoosa soils have lithic contacts within depths of 20 to 40 inches. Dardanelle soils have thicker mollic epipedons. Lula soils generally are redder and have limestone or chert fragments in the lower part of the solum. Mason soils have mollic epipedons 20 inches or more thick and do not have shale fragments within the solum and C horizon. Mer Rouge soils formed in alluvium and do not have coarse fragments in the solum. Tiptonville soils contain more very fine sand and commonly average less clay and are more friable in the B horizon. Barden and Parsons soils lack mollic epipedons and have more clay. Dennis soils contain mottles with chroma of 2 or less at shallower depths and have more clay in the subsoil. Fitzhugh soils are fine-loamy. Hartwell soils have more clay in the subsoil.
GEOGRAPHIC SETTING: These soils are on sloping uplands. The soil formed in residuum from shales covered with a thin loess mantle. Slope gradients range from 1 to about 10 percent but typically are less than 5 percent. The mean annual temperature ranges from 59 to 64 degrees F, and the mean annual precipitation ranges from 36 to 44 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Barden and Hartwell soils and the Barco and Roseland soils. Barden soils occur on similar landscapes. Hartwell soils occur on gentler slopes higher in the landscape. Barco and Roseland soils do not have mollic epipedons and occur on the steeper side slopes lower in the landscape.
DRAINAGE AND PERMEABILITY: Moderately well drained. Runoff is moderate. Permeability is moderate.
USE AND VEGETATION: These soils are cropped to corn, soybeans, small grain, and hay. Some are used for pasture. Native vegetation is tall prairie grasses.
DISTRIBUTION AND EXTENT: Prairie area of southwestern Missouri and adjacent areas of Kansas. The series has large extent.
MLRA OFFICE RESPONSIBLE: Salina, Kansas
SERIES ESTABLISHED: Henry County, Missouri, 1972.
REMARKS: Diagnostic horizons and features recognized in this series are: mollic epipedon - the zone from the surface of the soil to a depth of 14 inches (A horizon); argillic horizon - the zone from approximately 18 to 46 inches (Bt1, Bt2, and Bt3 horizons).