LOCATION SLOAN OH+AR IN MI NJ NY PA

Established Series
Rev. DRM-JWH-RAR
11/2021

SLOAN SERIES

The Sloan series consists of very deep, very poorly drained soils formed in loamy alluvium on flood plains. Slope ranges from 0 to 2 percent. Mean annual precipitation is about 914 mm (36 inches), and mean annual temperature is about 11 degrees C (51 degrees F).

TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Fluvaquentic Endoaquolls

TYPICAL PEDON: Sloan silty clay loam, on a slope of less than 1 percent in a cultivated field at an elevation of 274 meters (900 feet) above mean sea level. (Colors are for moist soil unless otherwise stated.)

Ap--0 to 23 cm (9 inches); very dark gray (10YR 3/1) silty clay loam, very dark grayish brown (10YR 3/2) rubbed, and gray (10YR 5/1) dry; moderate fine and medium angular blocky structure; friable; many fine roots; neutral; abrupt smooth boundary. [15 to 28 cm (6 to 11 inches) thick)]

A--23 to 38 cm (9 to 15 inches); very dark gray (10YR 3/1) silty clay loam, gray (10YR 5/1) dry; moderate medium angular blocky structure; friable; many fine roots; few medium distinct dark yellowish brown (10YR 3/4) masses of oxidized iron-manganese throughout; neutral; gradual wavy boundary. [0 to 33 cm (13 inches) thick]

Bg1--38 to 53 cm (15 to 21 inches); dark gray (10YR 4/1) silty clay loam; moderate medium prismatic structure parting to moderate medium subangular blocky; firm; common fine roots; common medium distinct dark yellowish brown (10YR 4/4) masses of oxidized iron-manganese throughout; few dark iron-manganese concretions throughout; neutral; gradual wavy boundary.

Bg2--53 to 86 cm (21 to 34 inches); gray (10YR 5/1) and dark gray (10YR 4/1) silty clay loam; weak medium subangular blocky structure; firm; few fine roots; many medium prominent brown (7.5YR 4/4) masses of oxidized iron-manganese and few fine prominent yellowish brown (10YR 5/6) masses of oxidized iron throughout; few distinct black manganese concretions throughout; neutral; clear smooth boundary. [Combined thickness of the Bg horizon is 20 to 114 cm (8 to 45 inches).]

BCg--86 to 114 cm (34 to 45 inches); gray (10YR 5/1) clay loam; massive; friable; many coarse prominent strong brown (7.5YR 5/6) masses of oxidized iron throughout; slightly alkaline; gradual wavy boundary. [0 to 51 cm (20 inches) thick]

Cg--114 to 152 cm (45 to 60 inches); gray (10YR 5/1) stratified loam, silt loam, silty clay loam, and sandy loam; massive; friable; many coarse distinct yellowish brown (10YR 5/4) and prominent yellowish brown (10YR 5/6) masses of oxidized iron throughout; slightly effervescent; slightly alkaline.

TYPE LOCATION: Mercer County, Ohio; about 2 1/2 miles north of Fort Recovery, in Recovery Township; 2600 feet south and 1980 feet west of the intersection of State Route 49 and Siegrist-Jutte Road; SW1/4 NE1/4 of sec. 6, T. 7 S., R.1 E.; USGS Fort Recovery, Indiana-Ohio topographic quadrangle; lat. 40 degrees 27 minutes 28.8 seconds N. and long. 84 degrees 47 minutes 28.0 seconds W., NAD 27.

RANGE IN CHARACTERISTICS:
Thickness of the solum: 51 to 152 cm (20 to 60 inches)
Depth to carbonates: 56 to more than 203 cm (22 to more than 80 inches)
Thickness of the mollic epipedon: 25 to 61 cm (10 to 24 inches) and includes the upper part of the B horizon in some pedons
Particle-size control section: averages 22 to 35 percent clay and 15 to 35 percent fine sand or coarser material
Mean annual soil temperature: 9 to 14 degrees C (48 to 57 degrees F)

Ap or A horizon:
Hue: 10YR or 2.5Y, or is neutral
Value: 2, 2.5 or 3 (4 or 5 dry)
Chroma: 0 to 2
Texture: silty clay loam, silt loam, or loam, or less commonly clay loam or sandy loam
Rock fragment content: 0 to 5 percent
Reaction: slightly acid to slightly alkaline

Bg horizon:
Hue: 10YR to 5Y, or is neutral
Value: 3 to 5
Chroma: 0 to 2
Texture: silty clay loam, clay loam, silt loam, or loam, and is stratified in some pedons
Rock fragment content: 0 to 5 percent
Reaction: slightly acid to slightly alkaline in the upper part and neutral to moderately alkaline in the lower part

Some pedons have a Bw horizon below 76 cm (30 inches).

BC or BCg horizon:
Hue: 10YR to 5Y, or is neutral
Value: 3 to 6
Chroma: 0 to 4
Texture: silty clay loam, clay loam, silt loam, or loam, or the gravelly analogs of these textures; stratified in some pedons
Rock fragment content: 0 to 34 percent
Reaction: neutral to moderately alkaline

Cg or C horizon:
Hue: 10YR to 5Y
Value: 3 to 6
Chroma: 1 to 4
Texture: typically stratified silty clay loam, clay loam, loam, silt loam, fine sandy loam, or sandy loam or the gravelly analogs of these textures; some pedons have thin strata of sand and/or gravel
Rock fragment content: 0 to 34 percent
Reaction: neutral to moderately alkaline

Sandy substratum phase:
Texture: coarse sand and gravelly sand, gravelly or very gravelly loamy coarse sand, or gravelly loamy sand are below a depth of 152 cm (60 inches)

Till substratum phase:
Texture: clay loam, silty clay loam, or loam
Reaction: moderately alkaline

COMPETING SERIES: These are the Ambraw, Gansner, Ozamis, Settlemeyer, and Toppenish series. Ambraw soils dominantly are more acidic than neutral in the cambic horizon. Gansner soils do not have a cambic horizon and have gleyed hues of 5G and 5GY in the lower part of the series control section. Ozamis soils have strata of ash within the series control section. Settlemeyer and Toppenish soils are calcareous in the upper part of the series control section.

GEOGRAPHIC SETTING: Sloan soils are on flood plains or in depressions along streams receiving sediment from areas of Wisconsinan age glaciation. Slope ranges from 0 to 2 percent. The soils formed in loamy alluvium washed mainly from soils formed in loamy, calcareous drift. Mean annual precipitation ranges from 787 to 1041 mm (31 to 41 inches). Mean annual temperature ranges from 7 to 13 degrees C (45 to 56 degrees F). Frost-free period is 130 to 200 days. Elevation is 213 to 305 meters (700 to 1000 feet) above mean sea level.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Eel, Genesee, Medway, Ross, and Shoals soils. The moderately well drained Eel, the well drained Genesee, and the somewhat poorly drained Shoals soils do not have mollic epipedons, and are nearer to stream channels or along more active streams. The moderately well drained Medway soils and well drained Ross soils are on higher landscape positions.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Very poorly drained. Depth to the top of an intermittent apparent high water table ranges from 30 cm (1 foot) above the surface to 30 cm (1 foot) below the surface between November and June in normal years. Potential for surface runoff is negligible to medium. These soils are subject to flooding from late fall to spring. Saturated hydraulic conductivity is moderately high; in the sandy substratum phase, it is very high. Permeability is moderate or moderately slow. In the sandy substratum phase, permeability is rapid in the lower part of the series control section.

USE AND VEGETATION: A large part is artificially drained and cultivated. Corn and soybeans are the principal crops with small acreages of hay, oats, and vegetables. Other areas, especially on the flood plains of the smaller streams, are used for permanent pasture or woodland. Native vegetation is deciduous forest, chiefly elm, ash, sycamore, silver maple, and willow.

DISTRIBUTION AND EXTENT: Extensively in MLRAs 98, 99, 111A, and 111B, and less extensively in MLRAs 94A, 96, 97, 101, 108A, 111C, 111D, 111E, 114A, 114B, 115A, 116A, 139, 140, 142, 143, 144A, and 145 in Arkansas, Indiana, Michigan, New Jersey, New York, Ohio, and Pennsylvania. The type location is in MLRA 111B. The series is of large extent.

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: AMHERST, MASSACHUSETTS

SERIES ESTABLISHED: Logan County, Ohio, 1933.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon: from the surface to a depth of 38 cm (Ap, A horizons).
Cambic horizon: from a depth of 38 to 86 cm (Bg horizon).
Aquic conditions: redox features visible in the lower part of the mollic and in all underlying horizons.

Sandy substratum and till substratum phases are recognized. A moderately deep to bedrock phase is also recognized. This phase will become a new series when areas are investigated and updated.

11/2011 Revision: minor formatting changes; updated terminology for redox features.

National Cooperative Soil Survey
U.S.A.