LOCATION NASHVILLE KS+OKEstablished Series
TAXONOMIC CLASS: Fine-silty, mixed, superactive, thermic Udic Haplustolls
TYPICAL PEDON: Nashville silt loam - cultivated. (Colors are for dry soil unless otherwise stated.)
Ap--0 to 12 inches; brown (7.5YR 4/2) silt loam, dark brown (7.5YR 3/2) moist; weak fine granular structure; soft, friable; slightly acid; gradual smooth boundary. (7 to 20 inches thick)
Bw--12 to 30 inches; reddish brown (5YR 5/4) silt loam, reddish brown (5YR 4/3) moist, and reddish brown (5YR 4/4) crushed; moderate fine granular structure; soft, friable; few soft siltstone fragments in lower 4 inches; neutral; clear smooth boundary. (10 to 28 inches thick)
Cr--30 inches; red (2.5YR 5/6) soft, neutral siltstone.
TYPE LOCATION: Harper County, Kansas; about 4 1/4 miles south of Harper, Kansas; 1,200 feet south and 250 feet east of the northwest corner of sec. 31, T. 32 S., R. 6 W.
RANGE IN CHARACTERISTICS: Thickness of solum ranges from 20 to about 40 inches and corresponds to the depth to the Cr horizon. Thickness of the mollic epipedon ranges from 7 to 20 inches.
The A horizon has 5YR or 7.5YR hue, value of 4 or 5 and 2 or 3 moist, and chroma of 2 or 3. Texture is predominantly silt loam. It ranges from moderately acid to neutral.
The Bw horizon has 2.5YR or 5YR hue, value of 4 or 5 and 3 or 4 moist, with a moist crushed value greater than 3.5, and chroma of 3 to 6. Texture is predominantly silt loam ranging between 18 to about 27 percent clay. This horizon is slightly acid or neutral.
The Cr horizon is soft red to reddish brown siltstone which is interbedded with sandstone in some areas.
COMPETING SERIES: The Nashville series is the only series in its family. Competing series in other families are the Canadian, Crisfield, Grant, Lucien, Minco, Nash, Pond Creek, Quinlan, and Woodward series. Canadian, Crisfield, Grant, Minco, and Pond Creek soils lack shale within depths of 40 inches. In addition, Crisfield and Canadian soils are coarse-loamy; Pond Creek and Grant soils have argillic horizons; and Minco soils are coarse-silty. Lucian and Quinlan soils have bedrock at depths of less than 20 inches. Nash soils are coarse-silty. Woodward soils have a calcareous control section and lack a mollic epipedon.
GEOGRAPHIC SETTING: Nashville soils are on nearly level to sloping erosional uplands. Slope gradients typically average between 1 and 5 percent but range from 0 to 12 percent. The soil is formed in residuum from siltstone. Mean annual precipitation ranges from 25 to 35 inches, and mean annual temperature ranges from 57 to 62 degrees F. Thornthwaite Annual P-E Index ranges from 44 to 60. Frost free days range from 190 to 230. Elevation ranges from 900 to 1500 feet.
GEOGRAPHICALLY ASSOCIATED SOILS: The competing Grant and Pond Creek soils are on similar topography, but in areas where the regolith is thicker. Lucian and Quinlan soils are associated in areas where the regolith is less than 20 inches thick and on more sloping topography.
DRAINAGE AND PERMEABILITY: Well drained. Runoff is negligible on 0 to 1 percent slopes, low on 1 to 5 percent slopes and medium on 5 to 12 percent slopes. Permeability is moderate.
USE AND VEGETATION: Mostly cultivated with wheat the principal crop. Sorghums and alfalfa are grown to a lesser extent. Native vegetation is tall and mid prairie grasses.
DISTRIBUTION AND EXTENT: South central Kansas and adjacent parts of Oklahoma. The series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Harper County, Kansas, 1970.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - the zone from the surface of the soil to a depth of about 12 inches (A horizon)
Cambic horizon - the zone from about 12 to 30 inches (Bw horizon).
The Nashville series comprises the fine- silty portion of the previous concept of the Nash series.