LOCATION POSEYVILLE MIEstablished Series
TAXONOMIC CLASS: Coarse-loamy, mixed, active, mesic Aquollic Hapludalfs
TYPICAL PEDON: Poseyville loamy sand - on an east facing slope of 2 percent in a cultivated field. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 9 inches; very dark grayish brown (10YR 3/2) loamy sand; gray (10YR 5/1) dry; moderate fine granular structure; very friable; many fine roots; neutral; abrupt smooth boundary. (7 to 10 inches thick)
E--9 to 16 inches; brown (10YR 5/3) sand; single grain; loose; many fine roots; many coarse distinct yellowish brown (10YR 5/6) masses of iron accumulations; neutral; abrupt wavy boundary. (0 to 8 inches thick)
Bt1--16 to 21 inches; yellowish brown (10YR 5/4) sandy loam; weak medium angular blocky structure; friable; common fine roots; common medium distinct grayish brown (10YR 5/2) iron depletions; clay bridging between sand grains; slightly alkaline; gradual wavy boundary.
Bt2--21 to 23 inches; brown (10YR 4/3) sandy loam; moderate thick platy structure parting to moderate coarse angular blocky; friable; few fine roots; common medium faint grayish brown (10YR 5/2) iron depletions and common medium distinct yellowish brown (10YR 5/6), and common medium prominent brownish yellow (10YR 6/8) masses of iron accumulations; clay bridging between sand grains; slightly alkaline; abrupt wavy boundary. (Combined thickness of Bt horizon is 3 to 7 inches.)
2Cg--23 to 60 inches; gray (10YR 5/1) loam; moderate medium angular blocky structure; firm; common medium prominent yellowish brown (10YR 5/8) masses of iron accumulations and moderate medium faint grayish brown (10YR 5/2) iron depletions; about 6 percent gravel; slight effervescence; moderately alkaline.
TYPE LOCATION: Midland County, Michigan; about 2 miles south of Coleman; 2,200 feet east and 200 feet north of the SW corner of sec. 32, T. 16 N., R. 2 W.
RANGE IN CHARACTERISTICS: The base of the argillic horizon and the depth to carbonates range from 13 to 24 inches. The reaction above the base of the argillic horizon ranges from slightly acid to mildly alkaline. Gravel content ranges from 0 to 10 percent throughout the profile.
The Ap horizon has hue of 10YR, and value and chroma of 2 to 4. Uncultivated pedons have A horizons, 3 to 5 inches thick, with hue of 10YR, value of 2 or 3, and chroma of 1 or 2. The E horizon has hue of 10YR, value of 4 to 6, and chroma of 2 or 3. The A and E horizons are sand, loamy sand, fine sand, or loamy fine sand.
The Bt horizon has hue of 10YR to 5YR, value of 4 or 5, and chroma of 3 to 6. It is sandy loam, coarse sandy loam, or fine sandy loam.
The 2C horizon has hue of 10YR to 5YR, value of 5 or 6, and chroma of 1 to 6. It is loam or clay loam. A stratified layer of very fine sand and silt, 1 to 8 inches thick, occurs above the 2C horizon in some pedons. It is moderately alkaline.
COMPETING SERIES: These are the Brady, Budd, Dixboro, Oakton and Wasepi series. Brady, Oakton and Wasepi soils are underlain with sand or sand and gravel in the lower part of the series control section. Budd soils are more than deep to carbonates. Dixboro soils are underlain with stratified materials starting at a depth of 24 to 44 inches.
GEOGRAPHIC SETTING: Poseyville soils are on lake plains and till plains of Wisconsinan age. Slope gradients range from 0 to 4 percent. Mean annual temperature ranges from 47 to 48 degrees F. Mean annual precipitation ranges from 28 to 36 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the somewhat poorly drained Capac, Londo, and Selfridge soils in similar areas and the poorly drained Parkhill soils in depressions and drainageways. Capac, Londo, and Parkhill soils do not have the sandy A and E horizons. Selfridge soils have 24 to 40 inches of sandy material overlying the loamy till.
DRAINAGE AND PERMEABILITY: Somewhat poorly drained. Potential surface runoff is negligible. Permeability is rapid in the A and E horizons and moderate or moderately slow in the Bt and 2C horizons.
USE AND VEGETATION: Poseyville soils are cropped to corn, field beans, soybeans, sugar beets, hay, and small grain.
DISTRIBUTION AND EXTENT: Central Michigan. The series is of moderate extent.
MLRA OFFICE RESPONSIBLE: Indianapolis, Indiana
SERIES ESTABLISHED: Midland County, Michigan, 1976.
REMARKS: Laboratory sample Nos. 74L512-74L515. Diagnostic horizons and features recognized in this pedon are:
ochric epipedon - the zone from the surface to 9 inches (Ap horizon);
argillic horizon - the zone from 16 to 23 inches (Bt1 and Bt2 horizons);
aquic feature - mottles with chroma of 2 or less in the upper 10 inches of the argillic horizon;