LOCATION SEBRING OHEstablished Series
TAXONOMIC CLASS: Fine-silty, mixed, superactive, mesic Typic Endoaqualfs
TYPICAL PEDON: Sebring silt loam, on a 1 percent slope in a cultivated field at an elevation of about 1,180 feet above msl. (Colors are for moist soil unless otherwise stated.)
Ap-- 0 to 9 inches; dark gray (10YR 4/1) silt loam, gray (10YR 6/1) dry; weak medium granular structure; friable; few fine prominent yellowish red (5YR 4/6) masses of iron accumulation lining root channels; moderately acid; abrupt smooth boundary. (6 to 10 inches thick.)
BEg-- 9 to 16 inches; gray (10YR 6/1) silt loam; moderate medium subangular blocky structure; friable; many faint gray (10YR 6/1) clay depletions on faces of peds; common medium prominent yellowish brown (10YR 5/6) masses of iron accumulation in the matrix; strongly acid; clear smooth boundary. (1 to 7 inches thick.)
Btg1-- 16 to 25 inches; gray (10YR 5/1) silty clay loam; weak medium prismatic structure parting to moderate medium subangular blocky; friable; few faint gray (10YR 5/1) clay films on faces of peds; many faint gray (10YR 5/1) silt coats on faces of peds; common fine prominent strong brown (7.5YR 5/6) masses of iron accumulation in the matrix; strongly acid; clear smooth boundary.
Btg2-- 25 to 34 inches; gray (10YR 5/1) silty clay loam; moderate coarse subangular blocky structure; firm; common faint gray (10YR 5/1) clay films on faces of peds; many faint gray (10YR 5/1) silt coats on faces of peds; common medium prominent strong brown (7.5YR 5/6) masses of iron accumulation in the matrix; moderately acid; clear smooth boundary. (Combined thickness of the Bt horizons is 18 to 35 inches.)
BCt-- 34 to 50 inches; yellowish brown (10YR 5/4) silty clay loam, with a few thin strata of silt loam; weak coarse prismatic structure; firm; very few prominent thick gray (N 5/0) clay films on vertical faces of peds; many prominent gray (N 5/0) silt coats on vertical faces of peds; common medium distinct gray (10YR 5/1) iron depletions in the matrix; common medium distinct brown (7.5YR 4/4) masses of iron accumulation in the matrix; neutral; gradual smooth boundary. (0 to 21 inches thick.)
C-- 50 to 60 inches; yellowish brown (10YR 5/4) silt loam, with thin strata of silty clay loam; common medium distinct gray (10YR 5/1) mottles; massive; friable; neutral.
TYPE LOCATION: Portage County, Ohio; about 3.3 miles north of Ravenna, in Shalersville Township, 4,400 feet south of Webb Road (County Road 204) and 100 feet west of State Route 44; T. 4 N., R. 8 W; USGS Ravenna, OH topographic quadrangle; Latitude 41 degrees, 12 minutes, 38 seconds N. and Longitude 81 degrees, 14 minutes, 39 seconds W., NAD 1927.
RANGE IN CHARACTERISTICS: Thickness of the solum ranges from 30 to 55 inches. The particle size control section averages 22 to 35 percent clay.
The Ap horizon has hue of 10YR or 2.5Y, value of 4 or 5, and chroma of 1 or 2. Some pedons have thin A horizons that have value of 2 to 4, and chroma of 1 or 2. Texture is silt loam or silty clay loam. Rock fragments are absent. Structure is weak or moderate, fine to coarse, granular or subangular blocky. Reaction is very strongly acid to moderately acid. Areas that have been limed range to neutral.
The E horizon, if present, is 3 to 10 inches thick. It has hue of 10YR or 2.5Y, value of 4 to 6, and chroma of 1 or 2. In cultivated areas the E horizon is mixed in with the Ap in most pedons. Some cultivated areas have an E horizon up to 6 inches thick.
The BEg horizon has hue of 10YR or 2.5Y, value of 4 to 6, and chroma of 1 or 2. Texture is silt loam or silty clay loam. Rock fragments range from 0 to 3 percent. Structure is weak or moderate, fine or medium, subangular or angular blocky. Reaction is moderately acid to very strongly acid. Some pedons have E/B or B/E horizons.
The Btg horizon has hue of 10YR to 5Y, or is neutral, value of 4 to 6, and chroma of 0 to 2. Some pedons have a Bt horizon below a depth of 30 inches that has chroma of 3 to 6. Texture is commonly silty clay loam or silt loam, and less commonly has thin strata of loam or clay loam less than 3 inches thick. Rock fragments range from 0 to 3 percent. Structure is weak to strong, fine to coarse, subangular blocky, angular blocky, prismatic or platy. Reaction is moderately acid to very strongly acid in the upper part and slightly acid to strongly acid in the lower part.
The BC, BCt, or BCg horizon has hue of 10YR to 5Y, or is neutral, value of 4 to 6, and chroma of 0 to 4. Texture is commonly silty clay loam or silt loam, and less commonly has thin strata of loam or clay loam less than 3 inches thick. Rock fragments range from 0 to 3 percent. Structure is weak or moderate, fine to coarse, subangular blocky, angular blocky, prismatic or platy. Reaction is strongly acid to neutral.
The C or Cg horizon has hue of 10YR to 5Y, or is neutral, value of 4 to 6, and chroma of 0 to 6. Texture is stratified or laminated and commonly is silt loam or silty clay loam, and less commonly thin strata of silty clay, clay loam, loam, fine sandy loam, sandy loam or very fine sand. Rock fragments range from 0 to 10 percent. Reaction is slightly acid to moderately alkaline and has carbonates in some pedons with a calcium carbonate equivalent of less than 10 percent.
COMPETING SERIES: These are the Moniteau and Racoon series. Moniteau soils formed in alluvium and lack a degraded BE horizon. Racoon soils have mean annual temperatures ranging from 53 to 57 degrees F.
GEOGRAPHIC SETTING: Sebring soils formed in stratified Wisconsinan age glaciolacustrine sediments and are on broad flats and depressions on lake plains and slackwater terraces. Slope ranges from 0 to 2 percent. Mean annual precipitation ranges from 29 to 43 inches, and mean annual temperature ranges from 47 to 52 degrees F. The frost free period is 133 to 198 days, and elevation ranges from 720 to 1,200 feet above msl.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Canadice, Caneadea, Damascus, Darien, Fitchville, Glenford, Jimtown, Luray, Mahoning, Mentor, Ravenna and Wadsworth soils. The well drained Mentor soils, moderately well drained Glenford soils, somewhat poorly drained Fitchville soils and very poorly drained Luray soils are in a toposequence with Sebring soils. The fine textured Canadice and Caneadea soils are on similar landscape positions. The Damascus and Jimtown soils formed in outwash on nearby outwash plains. The Darien, Mahoning, Ravenna and Wadsworth soils formed in till on nearby till plains.
DRAINAGE AND PERMEABILITY: Poorly drained. The potential for surface runoff is negligible to low. Frequent brief ponding occurs during periods of heavy rainfall and during spring snowmelt. Permeability is moderately slow in the subsoil and moderate or moderately slow in the substratum. Depth to the top of an intermittent apparent seasonal high water table ranges from +0.5 to 0.5 foot from November to June in normal years.
USE AND VEGETATION: Slightly more than half of this soil has been cleared, but because of wetness, most areas are used for pasture. Some areas are cultivated, with corn, oats and mixed hay being the main crops. Pin oak and swamp white oak are the dominant tree species in wooded areas.
DISTRIBUTION AND EXTENT: Northeastern and central Ohio. MLRA's 100, 111, 114, 124, and 139. Sebring soils are of moderate extent, about 100,000 acres.
MLRA OFFICE RESPONSIBLE: Amherst, Massachusetts.
SERIES ESTABLISHED: Knox County, Ohio, 1936.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - from the surface to a depth of 16 inches (Ap and BEg horizons).
Argillic horizon - from a depth of 16 to 34 inches (Btg1 and Btg2 horizons).
Aquic conditions - from the surface to a depth of 60 inches.
Udic moisture regime.
This revision reflects a change in taxonomic classification, adding the superactive cation-exchange activity class, due to updates contained in the 8th Edition of Keys to Soil Taxonomy. Competing series may change as similar soils are reclassified.
A till substratum phase and a sandstone bedrock substratum phase correlated in earlier surveys will not meet current criteria for substratum phases, and will be evaluated for correlating as new series in future MLRA updates. A dark surface variant has been correlated and also will be evaluated for correlating as a new series in future MLRA updates.
It is anticipated that soils correlated as Sebring series in areas outside of MLRA's 100 and 139 will be evaluated for correlating as new series in future MLRA updates.