LOCATION MICHIGAN                TX

Established Series
CJV, JAC
07/2012

MICHIGAN SERIES

The Michigan series consists of very deep well drained soils that formed in alluvium. The Michigan soils are on alluvial flats. Slopes range from 0 to 3 percent. Mean annual air temperature is about 65 degrees F. (18 degrees C) and the mean annual precipitation is about 13 inches (330 mm).

TAXONOMIC CLASS: Fine, mixed, superactive, thermic Ustic Haplocambids

TYPICAL PEDON: Michigan clay - cropland. (Colors are for dry conditions unless otherwise noted)

Ap--0 to 7 inches, (0 to 18 cm); reddish brown (5YR 5/4) clay, reddish brown (5YR 4/4) moist; 40 percent clay; moderate fine and medium angular blocky structure; hard, firm, very sticky and very plastic; few very fine roots; few very fine pores; slightly effervescent; moderately alkaline (pH 7.9); clear smooth boundary. (5 to 12 inches [12 to 30 cm] thick)

Bw--7 to 21 inches, (18 to 53 cm); reddish brown (5YR 4/4) clay, dark reddish brown (5YR 3/4) moist; 43 percent clay; weak medium subangular blocky structure parting to moderate fine subangular blocky; slightly hard, firm, very sticky and very plastic; few very fine roots; few very fine pores; strongly effervescent; moderately alkaline (pH 8.1); gradual smooth boundary. (4 to 47 inches [10 to 120 cm] thick)

Bk1--21 to 41 inches, (53 to 104 cm); reddish brown (5YR 4/4) clay, dark reddish brown (5YR 3/4) moist; 42 percent clay; moderate fine and medium subangular blocky structure; slightly hard, firm, very sticky and very plastic; few very fine roots; few very fine pores; 2 percent fine faint carbonate masses; 1 percent subrounded mixed gravel; strongly effervescent; moderately alkaline (pH 8.2); gradual smooth boundary.

Bk2--41 to 60 inches (104 to 152 cm); light reddish brown (5YR 6/4) clay, reddish brown (5YR 4/4), moist; 42 percent clay; moderate fine and medium subangular blocky structure; hard, firm, very sticky and very plastic; few very fine roots; few very fine pores; 2 percent fine calcium carbonate filaments; 2 percent subrounded mixed gravel; violently effervescent; moderately alkaline (pH 8.2).

TYPE LOCATION: Culberson County, Texas; from the junction of U.S. Highway 80 and Texas Highway 54; 0.65 mile north on Texas Highway 54 to junction with FM 2185; 10.7 miles east and north on FM 2185; 1.5 miles north on FM 2809; 0.5 mile west on Conally road; and 232 feet north in cropland. (Watson Ranch, TX USGS 7.5 minute topographic quadrangle; Latitude: 31 degrees, 8 minutes, 9 seconds north; Longitude: 104 degrees, 43 minutes, 10 seconds west, NAD83; (UTM easting: 526750 m, UTM northing 3444685 m, UTM Zone 13, NAD83.)

RANGE IN CHARACTERISTICS:

Soil moisture: Precipitation falls during afternoon thunderstorms mostly from July to September. The driest month is March. Ustic aridic soil moisture regime.

Depth to cambic horizon: 5 to 10 inches.

Depth to secondary carbonates: 20 to 40 inches.

Particle-size control section (weighted average)
Clay content: 35 to 50 percent
Calcium carbonate equivalent: less than 15 percent

A or Ap horizon
Hue: 5YR, 7.5YR
Value: 4 to 6 dry, 3 or 4 moist
Chroma: 3 or 4, dry or moist
Texture: silty clay loam, clay loam, clay
Clay content: 25 to 50 percent
Rock fragments: 0 to 3 percent gravel
Effervescence class: slight to strong
Reaction: slightly alkaline to moderately alkaline

Bw horizon
Hue: 5YR, 7.5YR
Value: 4 to 6 dry, 3 to 5 moist
Chroma: 3 to 6, dry or moist
Texture: silty clay loam, clay loam, silty clay, clay
Clay content: 32 to 50 percent
Rock fragments: 0 to 3 percent gravel
Effervescence class: slight to strong
Reaction: slightly alkaline to moderately alkaline

Bk horizon
Hue: 5YR, 7.5YR
Value: 4 to 6 dry, 3 to 6 moist
Chroma: 4 to 6, dry or moist
Texture: clay loam, silty clay, clay
Clay content: 25 to 52 percent
Rock fragments: 0 to 10 percent gravel
Effervescence class: slight to violent
Reaction: moderately alkaline

COMPETING SERIES: There are no competing series.

GEOGRAPHIC SETTING: Michigan soils are on alluvial flats in bolsons at elevations of 4,000 to 5,500 feet (1,219 to 1,676 m). Slopes range from 0 to 3 percent. These soils formed in alluvium. The mean annual precipitation is 12 to 16 inches (305 to 406 mm). The mean annual soil temperature is 62 to 65 degrees F. (17 to 18 degrees C). The mean annual air temperature is 62 to 67 degrees F. (17 to 19 degrees C). The frost-free period is 210 to 250 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Antbed (TX) (T), Dalby (TX), McAllister (AZ) and Verhalen (TX) soils.
The Antbed soils have an argillic horizon and are located on similar positions. Dalby and Verhalen soils have slickensides and are located on basin floors. McAllister soils have an argillic and calcic horizon and are located on alluvial fans.

DRAINAGE AND PERMEABILITY: Well drained. Runoff is very low. Permeability is moderately slow.

USE AND VEGETATION: Used as cropland and livestock grazing. Vegetation includes tobosa, blue grama, burrograss, sideoats grama, tarbush, and western honey mesquite.

DISTRIBUTION AND EXTENT: Trans-Pecos Texas. LRR D, MLRA 42, Southern Desertic Basins, Plains, and Mountains. The series is of minor extent.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona

SERIES ESTABLISHED: Culberson County, Texas; Soil Survey of Culberson County, Texas (Main Part), 2012.

REMARKS: Diagnostic horizons and features recognized in this pedon are:

Particle Size Control Section: 1o to 40 inches (25 to 100 cm) (Bw, Bk1 horizons)

Ochric epipedon - the zone from 0 to 7 inches (0 to 18 cm) (Ap horizon)

Cambic horizon - the zone from 7 to 60 inches (18 to 152 cm) (Bw, Bk1, Bk2 horizons)

Classified according to Soil Taxonomy, Second Edition, 1999; Keys to Soil Taxonomy, Eleventh Edition, 2010

Revised for the correlation of Hudspeth County, Texas (Main Part) and Culberson County, Texas (Main Part); July, 2012, NMS

ADDITIONAL DATA: None

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National Cooperative Soil Survey
U.S.A.