LOCATION HEVERLO            OH
Established Series
Rev. PCJ-JAG
04/2007

HEVERLO SERIES


The Heverlo series consists of moderately deep, well drained soils formed in till or in poorly sorted outwash. These soils are on valley sides on till plains. Slope ranges from 25 to 70 percent. Mean annual precipitation is about 940 mm (37 inches), and mean annual air temperature is about 10 degrees C (50 degrees F).

TAXONOMIC CLASS: Fine, mixed, active, mesic Typic Hapludalfs

TYPICAL PEDON: Heverlo silt loam, on a 45 percent slope in woods at an elevation of 293 meters (960 feet) above mean sea level. (Colors are for moist soil unless otherwise stated.)

A--0 to 10 cm (0 to 4 inches); dark grayish brown (10YR 4/2) silt loam; strong fine and medium granular structure; friable; few coarse and common fine and medium roots; few fine tubular and vesicular pores; 5 percent gravel; slightly alkaline; clear smooth boundary. [8 to 13 cm (3 to 5 inches) thick]

AE--10 to 23 cm (4 to 9 inches); dark yellowish brown (10YR 4/4) silt loam; weak medium subangular blocky structure; friable; few coarse and common fine and medium roots; few fine tubular and vesicular pores; 5 percent gravel; slightly alkaline; clear smooth boundary. [0 to 13 cm (5 inches) thick]

BE--23 to 36 cm (9 to 14 inches); yellowish brown (10YR 5/4) loam; weak medium subangular blocky structure; friable; few coarse and common fine and medium roots; many fine vesicular and few medium tubular pores; dark grayish brown (10YR 4/2) krotovina; tonguing of dark yellowish brown (10YR 4/4) material; 10 percent gravel; neutral; clear smooth boundary. [0 to 13 cm (5 inches) thick]

Bt1--36 to 51 cm (14 to 20 inches); yellowish brown (10YR 5/6) gravelly clay loam; weak medium subangular blocky structure; firm; few coarse, medium, and fine roots; common fine vesicular and few fine and medium tubular pores; common faint yellowish brown (10YR 5/4) clay films on faces of peds; few fine distinct reddish yellow (7.5YR 6/8) masses of iron accumulation in the matrix; 15 percent gravel; neutral; clear smooth boundary.

Bt2--51 to 84 cm (20 to 33 inches); yellowish brown (10YR 5/6) gravelly clay loam; strong fine and medium subangular blocky structure; firm; few fine and medium roots; common fine vesicular and few fine tubular pores; many faint yellowish brown (10YR 5/4) clay films on faces of peds; few fine faint strong brown (7.5YR 5/6) masses of iron accumulation in the matrix; 30 percent rock fragments; slightly acid; clear smooth boundary. [Combined thickness of the Bt horizon is 46 to 76 cm (18 to 30 inches).]

2Cr--84 to 109 cm (33 to 43 inches); variegated very dark brown (10YR 2/2), black (10YR 2/1), and dark gray (10YR 4/1) highly fractured shale; cuts with spade.

TYPE LOCATION: Morrow County, Ohio; about 1 mile southwest of West Liberty, in Peru Township; 1,050 feet northeast of the intersection of County Rd. 24 and County Rd. 15, along County Rd. 24, then 900 feet east; USGS Kilbourne, Ohio topographic quadrangle; lat. 40 degrees 22 minutes 02.5 seconds N. and long. 82 degrees 54 minutes 02.6 seconds W., NAD 27.

RANGE IN CHARACTERISTICS:
Depth to the base of the ochric epipedon: 20 to 38 cm (8 to 15 inches)
Depth to a paralithic contact: 51 to 102 cm (20 to 40 inches)
Thickness of the solum: 51 to 102 cm (20 to 40 inches)
Depth to the base of the argillic horizon: 51 to 102 cm (20 to 40 inches)
Rock fragments: glacial erratics and shale gravel and channers
Particle-size control section: averages 35 to 45 percent clay

A or AE horizon:
Hue: 10YR
Value: 3 or 4
Chroma: 2 to 4
Texture: silt loam
Rock fragment: 0 to 10 percent
Reaction: moderately acid to slightly alkaline

BE horizon:
Hue: 7.5YR or 10YR
Value: 4 or 5
Chroma: 3 to 5
Texture: loam, silt loam, silty clay loam, or clay loam
Rock fragment: 0 to 10 percent
Reaction: moderately acid to neutral

Bt horizon:
Hue: 7.5YR or 10YR
Value: 4 or 5
Chroma: 4 to 6
Texture: silty clay loam, clay loam, or clay or the gravelly or channery analogs of these textures
Rock fragment content: 5 to 34 percent
Reaction: moderately acid to neutral

COMPETING SERIES: These are the Beasley, Bledsoe, Bonnell, Brashear, Bratton, Bucklick, Caneyville, Cosperville, Donahue, Eden, Elba, Enott, Estate, Faywood, Fredonia, Haggatt, Heitt, Jessup, Kewaunee, Lowell, Markland, Milton, Mountpleasant, Muncie, Shrouts, and Vandalia series. Beasley, Bledsoe, Bonnell, Brashear, Bucklick, Cosperville, Elba, Enott, Estate, Haggatt, Heitt, Jessup, Kewaunee, Lowell, Markland, Mountpleasant, Muncie, and Vandalia soils do not have a paralithic contact within 102 cm (40 inches). Bratton, Caneyville, Donahue, Faywood, Fredonia, and Milton soils have a lithic contact within 102 cm (40 inches). Eden and Shrouts soils do not have glacial erratics within the series control section.

GEOGRAPHIC SETTING: Heverlo soils are on valley sides on deeply dissected till plains of Wisconsinan age. Slope ranges from 25 to 70 percent. They formed in till of Late Wisconsinan age and in some places in poorly sorted outwash. Mean annual precipitation ranges from 787 to 1067 mm (31 to 42 inches). Mean annual air temperature ranges from 8 to 12 degrees C (46 to 54 degrees F).

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Gallman, Glynwood, Lybrand, and Lobdell soils. Gallman soils have less clay and are on adjacent outwash terraces. The Lybrand and moderately well drained Glynwood soils are on adjacent end moraines. The moderately well drained Lobdell soils have less clay and are on adjacent flood plains.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained. The potential for surface runoff is high. Saturated hydraulic conductivity is moderately high. Permeability is moderate.

USE AND VEGETATION: Areas are in woods. Native vegetation is mixed hardwoods.

DISTRIBUTION AND EXTENT: Central Ohio; MLRA 111B. The series is of small extent with about 300 acres.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Indianapolis, Indiana.

SERIES ESTABLISHED: Delaware County, Ohio, 1996.

REMARKS: The Heverlo series has previously been mapped as Colyer Variant soils in adjacent Morrow County and as Colyer soils in Delaware County.

Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon: from the surface to a depth of 36 cm (A, AE, BE horizons).
Argillic horizon: from a depth of 36 to 84 cm (Bt horizon).
Paralithic contact: at 84 cm (top of the 2Cr layer).


National Cooperative Soil Survey
U.S.A.