LOCATION JEDDO MI

Established Series
Rev. GRL-WEF
08/2012

JEDDO SERIES

The Jeddo series consists of very deep, poorly drained and very poorly drained soils formed in drift on ground moraines. Slope ranges from 0 to 2 percent. Mean annual precipitation is about 762 mm (30 inches), and mean annual temperature is about 10.6 degrees C (51 degrees F).

TAXONOMIC CLASS: Fine, mixed, semiactive, mesic Aeric Epiaqualfs

TYPICAL PEDON: Jeddo silt loam, in a cultivated field. (Colors are for moist soil unless otherwise stated.)

Ap--0 to 20 cm (8 inches); dark gray (10YR 4/1) silt loam, gray (10YR 6/1) dry; weak medium subangular blocky structure; friable; very strongly acid; abrupt smooth boundary. [15 to 23 cm (6 to 9 inches) thick]

Btg1--20 to 43 cm (8 to 17 inches); gray (5Y 5/1) silty clay loam; weak medium prismatic structure parting to weak medium angular blocky; firm; thin clay films on faces of peds; few fine prominent dark yellowish brown (10YR 4/4) and light olive brown (2.5Y 5/4) masses of oxidized iron; very strongly acid; clear wavy boundary.

Btg2--43 to 69 cm (17 to 27 inches); gray (5Y 5/1) silty clay; weak medium prismatic structure parting to weak medium angular blocky; very firm; thin clay films on faces of most peds and thick clay fillings and flows along root channels and cracks; many fine prominent brown (7.5YR 4/4), strong brown (7.5YR 5/6), and yellowish red (5YR 4/6) masses of oxidized iron; very strongly acid; clear wavy boundary. [Combined thickness of the Btg horizon is 30 to 84 cm (12 to 33 inches).]

Bt1--69 to 89 cm (27 to 35 inches); strong brown (7.5YR 5/6) silty clay; weak medium prismatic structure parting to weak coarse angular blocky; very firm; thick clay films on all vertical and horizontal faces of prisms and clay fillings in cracks and along old root channels; thin clay films on faces of blocky peds; many fine and medium prominent gray (N 5/) and brown (10YR 4/3) iron depletions; strongly acid; abrupt wavy boundary.

Bt2--89 to 117 cm (35 to 46 inches); olive brown (2.5Y 4/4) silty clay; weak medium prismatic structure parting to weak coarse angular blocky; firm; thick clay films on most vertical and horizontal faces of prisms; fillings in cracks and root channels; many fine and medium prominent gray (N 5/) and dark gray (10YR 4/1) iron depletions: many fine and medium distinct yellowish brown (10YR 5/6) masses of oxidized iron; neutral; abrupt wavy boundary. [Combined thickness of the Bt horizon is 33 to 102 cm (13 to 40 inches).]

C--117 to 158 cm (46 to 62 inches); olive brown (2.5Y 4/4) silty clay loam; massive; firm; many thick clay flows in vertical cracks and root channels; many fine and medium prominent dark gray (N 4/) iron depletions; slightly effervescent; slightly alkaline.

TYPE LOCATION: St. Clair County, Michigan; about 1 1/2 miles southwest of the village of Fargo; 150 feet east and 2250 feet north of the southwest corner, sec. 35, T. 8 N., R. 15 E.

RANGE IN CHARACTERISTICS:
Thickness of the solum: commonly 102 to 124 cm (40 to 49 inches) but ranges to 140 cm (55 inches)

Ap horizon:
Hue: 10YR
Value: 2 to 4
Chroma: 1 or 2
Texture: loam or silt loam
Reaction: very strongly acid to neutral

Btg horizon:
Hue: 10YR or 5Y
Value: 4 to 6
Chroma: 1
Texture: clay loam, silty clay loam, clay, or silty clay
Clay content: 35 to 45 percent (weighted average)
Reaction: very strongly acid to neutral

Bt horizon:
Hue: 7.5YR to 5Y
Value: 4 to 6
Chroma: 3 to 6
Texture: clay loam, silty clay loam, clay, or silty clay
Clay content: 35 to 45 percent (weighted average)
Reaction: very strongly acid to neutral

C horizon:
Hue: 10YR or 2.5Y
Value: 4 or 5
Chroma: 3 or 4
Texture: clay loam or silty clay loam
Special features: many thick clay flows continue down along the vertical cracks to a depth below 158 cm (62 inches)

COMPETING SERIES: This is the Aden series. Aden soils are in wetter and warmer climates with a mean annual precipitation of more than 813 mm (32 inches) and mean annual temperature of more than 11.7 degrees C (53 degrees F).

GEOGRAPHIC SETTING: Jeddo soils are on ground moraines of Wisconsin age. Slope ranges from 0 to 2 percent. The Jeddo soils formed in moderately fine textured drift. Mean annual precipitation ranges from 711 to 813 mm (28 to 32 inches). Mean annual temperature ranges from 7.2 to 11.7 degrees C (45 to 53 degrees F).

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Blount, Boyer, Lamson, Lenawee, Metamora, Nappanee, Parkhill, Spinks, Toledo, and Wasepi soils. The somewhat poorly drained Blount and Nappanee soils and the poorly drained Parkhill soils are found on similar landscape positions. Parkhill soils do not have argillic horizons. The very poorly drained, finer textured Toledo soils and the Lenawee and coarser textured Lamson soils occupy small lake bed areas within the boundaries of the till plain or occur adjacent to Jeddo soils where the till plains border lake plains. The well drained Boyer and Spinks soils and the somewhat poorly drained Metamora and Wasepi soils have less clay and more sand and commonly occur in the surrounding uplands.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Poorly drained or very poorly drained. Potential for surface runoff is negligible to medium depending on slope gradient and shape. Saturated hydraulic conductivity is moderately low. Permeability is slow.

USE AND VEGETATION: Most areas have been cleared and either cultivated or pastured. Many areas are now idle. Cropped areas are planted mainly to corn, wheat, and mixed hay. Woodlots and the remaining forested areas consist of second growth red maple, white ash, and swamp white oak.

DISTRIBUTION AND EXTENT: MLRA 99 in central-eastern Michigan. This series is of small extent.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: AMHERST, MASSACHUSETTS

SERIES ESTABLISHED: St. Clair County, Michigan, 1929.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon: from the surface to a depth of 20 cm (8 inches) (Ap horizon).
Argillic horizon: from the surface to a depth of 20 to 117 cm (8 to 46 inches) (Btg1, Btg2, Bt1 and Bt2 horizons).
Aquic conditions: redoximorphic features present in all horizons below the ochric epipedon.

National Cooperative Soil Survey
U.S.A.