LOCATION STOKLY KYEstablished Series
TAXONOMIC CLASS: Coarse-loamy, mixed, semiactive, acid, mesic Aeric Fluvaquents
TYPICAL PEDON: Stokly fine sandy loam - pasture. (Colors are for moist soil.)
Ap--O to 8 inches, dark grayish brown (1OYR 4/2) fine sandy loam; common medium distinct brown (7.5YR 4/4) (1OYR 4/3), and olive gray (5Y 5/2) mottles; weak fine granular structure; very friable; many fine roots; very strongly acid; clear smooth boundary. (5 to 1O inches thick)
Bw--8 to 19 inches, brown (1OYR 5/3) fine sandy loam; common medium distinct olive gray (5Y 5/2) and brown (7.5YR 4/4) mottles; weak medium subangular blocky structure; very friable; many fine roots; strongly acid; clear smooth boundary. (5 to 16 inches thick)
Bg--19 to 34 inches, dark gray (5Y 4/1) fine sandy loam; few fine distinct brown (7.5YR 4/4) mottles; weak medium and fine subangular blocky structure; very friable; few fine roots; 5 percent sandstone pebbles; strongly acid; clear smooth boundary. (10 to 30 inches thick)
Cg--34 to 76 inches, olive gray (5Y 5/2) gravelly sandy loam; many medium distinct mottles of brown (7.5YR 4/4) and yellowish brown (1OYR 5/6); massive; very friable; 3O percent sandstone and siltstone pebbles and fragments; very strongly acid.
TYPE LOCATION: Boyd County, Kentucky, about 14 miles south of Ashland, 1-1/2 miles west of East Fork Little Sandy River and 3O yards south of Fourmile Creek.
RANGE IN CHARACTERISTICS: The solum thickness ranges from 2O to 4O inches and depth to bedrock is more than 5 feet. Reaction throughout the soil ranges from strongly to extremely acid; where limed, the upper part of the solum ranges to neutral. Sandstone and siltstone pebbles and fragments range from O to 15 percent by volume in the solum and from O to 4O percent in the C horizons.
The Ap and AB horizons, when present, have hue of 1OYR or 2.5Y, values of 4 or 5, and chroma of 2 through 4 and most pedons are mottled in shades of brown or gray. They are fine sandy loam, sandy loam, or loam and have weak or moderate fine or medium granular structure. Some pedons have A horizons 1 to 4 inches thick with values of 3 and some have AB horizons 5 to 1O inches thick with colors like that described for the Ap horizon.
The Bw horizons have hues of 1OYR or 2.5Y, values of 4 or 5, and chroma of 2 through 4, or values of 6 or 7 and chroma of 3 or 4. Mottles are in shades of gray or brown. They are fine sandy loam, sandy loam, or loam, and have weak, fine through coarse, subangular blocky or granular structure.
The Bg horizons have hues of 1OYR through 5Y, values of 6 or 7 and chroma of 2 or less, or values of 4 or 5 and chroma of 1 or less, and hue of 5Y, values of 4 or 5, and chroma of 2 or less. Mottles are in shades of gray or brown. Texture and structure is like the Bw horizon.
The Cg horizons have colors like the Bg and are fine sandy loam, sandy loam, or loam, and their gravelly or channery analogues. Some pedons are loamy sand below a depth of 3O inches.
COMPETING SERIES: There are no competing soils in the same family with Stokly. Atkins, Bonnie and Stendal soils are in similar families. Atkins and Bonnie soils have B horizons in which the dominant chroma of the matrix is 2 or less and have more than 18 percent clay in their particle-size control sections. The Stendal soils have silt loam or silty clay loam textures to a depth of 4O inches or more.
GEOGRAPHIC SETTING: Stokly soils are on nearly level floodplains of small streams. The soils formed in alluvium from acid sandstone, siltstones, and shales. Near the type location, the mean annual temperature ranges from 53 to 56 degrees F., and the mean annual precipitation ranges from 4O to 45 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Atkins, Bonnie, and Stendal soils which have more clay, and the Cotacco and Pope soils. The Cotacco soils have argillic horizons and are moderately well drained. The Pope soils are well drained and lack grayish colors in the solum.
DRAINAGE AND PERMEABILITY: Somewhat poorly drained and runoff is slow. Permeability is moderately rapid. Stokly soils are subject to common flooding of very brief duration, February through May, and have an apparent water table within O.5 to 1.O feet of the surface, February through May.
USE AND VEGETATION: Most areas are used for crops or pasture and some are forested. Native forests have mixed wetland hardwoods as the dominant species.
DISTRIBUTION AND EXTENT: Eastern Kentucky and possible similar areas of West Virginia and Tennessee. The extent is small.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia
ESTABLISHED SERIES: Boyd-Greenup Counties, Kentucky, 1975.
REMARKS: If the Stokly soils are permitted to become air-dry and then re-wetted, the matrix colors in the lower part of the solum have chroma of more than 2. It is theorized that the oxidation of the iron imparts brighter color to the soil.
Diagnostic horizons and features in the pedon are:
Ochric epipedon, 0 to 8 inches, Ap
Aquic moisture regime at 19 to 76 inches (Bg,Cg)