LOCATION MAYBEE MTEstablished Series
TAXONOMIC CLASS: Loamy-skeletal over sandy or sandy-skeletal, mixed, superactive Oxyaquic Argicryolls
TYPICAL PEDON: Maybee silt loam, in irrigated grass hay (colors are for dry soil unless otherwise noted).
Oi--0 to 2 inches; undecomposed and partially decomposed matted roots; abrupt smooth boundary. (1 to 3 inches thick)
A1--2 to 7 inches; dark grayish brown (10YR 4/2) silt loam, very dark gray (10YR 3/1) moist; few fine faint strong brown (7.5YR 4/6) moist redox concentrations (due to prolonged saturation from flood irrigation); weak medium and fine subangular blocky structure parting to weak fine and very fine granular; soft, very friable, slightly sticky and slightly plastic; many very fine roots and few fine roots; many fine and very fine dendritic tubular pores; 10 percent gravel; neutral (pH 6.7); clear wavy boundary.
A2--7 to 12 inches; grayish brown (10YR 5/2) gravelly loam, very dark grayish brown (10YR 3/2) moist; few fine faint strong brown (7.5YR 4/6) moist redox concentrations (due to prolonged saturation from flood irrigation); weak fine and very fine granular structure; soft, very friable, slightly sticky and slightly plastic; common very fine and few fine roots; many fine and very fine dendritic tubular pores; 20 percent gravel; neutral (pH 6.8); clear wavy boundary. (Combined thickness of A horizons is 7 to 15 inches thick)
Bt1--12 to 21 inches; pale brown (10YR 6/3) very gravelly clay loam, brown (10YR 4/3) moist; few fine faint strong brown (7.5YR 4/6) moist redox concentrations (due to prolonged saturation from flood irrigation); moderate medium and fine subangular blocky structure; hard, firm, moderately sticky and moderately plastic; common very fine and few fine roots; common very fine and few fine dendritic tubular pores; common distinct patchy clay films on faces of peds; 35 percent gravel, 10 percent cobbles; neutral (pH 6.7); clear wavy boundary.
Bt2--21 to 27 inches; light yellowish brown (10YR 6/4) very cobbly sandy clay loam, yellowish brown (10YR 5/4) moist; few fine faint strong brown (7.5YR 4/6) moist redox concentrations (due to prolonged saturation from flood irrigation); moderate medium and fine subangular blocky structure; moderately hard, friable, slightly sticky and slightly plastic; few fine and very fine roots; common very fine and few fine dendritic tubular pores; common faint patchy clay films between sand grains and few faint patchy clay films on faces of peds; 35 percent gravel, 20 percent cobbles; neutral (pH 6.8); clear wavy boundary. (Combined thickness of Bt horizons is 12 to 24 inches)
2C--27 to 60 inches; light yellowish brown (2.5Y 6/4) very cobbly loamy sand, light olive brown (2.5Y 5/4) moist; few fine faint strong brown (7.5YR 4/6) moist redox concentrations (due to prolonged saturation from flood irrigation); single grain; loose, non-sticky and non plastic; 35 percent gravel, 20 percent cobbles; neutral (pH 7.2).
TYPE LOCATION: Beaverhead County, Montana; approximately 700 feet south and 1700 feet east of the NW corner of sec. 36, T 2 S, R 17 W; USGS Isaac Meadows, Montana topographic quadrangle; North American Datum 83, zone 12, UTM 293304 E, 5055378 meters N.
RANGE IN CHARACTERISTICS:
Mean annual soil temperature-35 to 40 degrees F., cryic temperature regime
Mean summer soil temperature-53 to 57 degrees F.
Moisture control section: between 4 and 12 inches; dry in some or all parts for 90 or more cumulative days in normal years; not dry in all parts for more than half of the cumulative days. Ustic moisture regime.
Mollic epipedon thickness: 7 to 15 inches.
Depth to 2C horizon: 20 to 40 inches.
A1 horizon - Hue: 10YR
Value: 4 or 5 dry; 2 or 3 moist
Chroma: 1, 2 or 3
Clay content: 18 to 25 percent
Content of rock fragments: 5 to 15 percent gravel
Reaction: pH 6.1 to 7.3
A2 horizon - Hue: 10YR
Value: 4 or 5 dry; 2 or 3 moist
Chroma: 1, 2 or 3
Texture: loam or silt loam
Clay content: 18 to 27 percent
Content of rock fragments: 5 to 35 percent (0 to 10 percent cobbles; 5 to 25 percent gravel)
Reaction: pH 6.1 to 7.3
Bt horizons - Hue: 10YR or 2.5Y
Value: 5 or 6 dry; 3, 4, or 5 moist
Chroma: 3 or 4
Texture: sandy clay loam, loam or clay loam
Clay content: 23 to 35 percent
Rock fragments: 35 to 65 percent--10 to 25 percent cobbles, 25 to 40 percent gravel
Reaction: pH 6.1 to 7.3
2C horizon 10YR or 2.5Y
Value: 6, 7 or 8 dry; 5 or 6 moist
Chroma: 2, 3, or 4
Texture: loamy sand, loamy coarse sand, sand or coarse sand
Clay content: 0 to 10 percent
Rock fragments: 35 to 75 percent--10 to 25 percent cobbles, 25 to 50 percent gravel
Reaction: pH 6.4 to 7.3
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING:
Landform - Remnant terraces
Elevation - 6,000 to 6,600 feet.
Slope - 0 to 2 percent.
Parent material - Mixed alluvium.
Climate - long, cold winters; cool, moist springs; short, cool summers.
Mean annual precipitation - 14 to 19 inches.
Mean annual air temperature - 34 to 39 degrees F.
Frost-free period - 30 to 50 days
GEOGRAPHICALLY ASSOCIATED SOILS:
These are the Beaverslide, Bighole, Cowcamp, Libeg and Mooseflat soils. The Beaverslide soils have greater then 35 percent clay in the control section and occur on remnant terraces and fans, Bighole soils are fine-loamy and occur on remnant terraces and fans, Cowcamp soils are loamy-skeletal and occur on remnant terraces, and fans, Libeg soils are loamy-skeletal and occur on remnant terraces and fans in rangeland, Mooseflat soils are very poorly drained and occur on floodpains and drainageways.
DRAINAGE AND PERMEABILITY: Well drained, moderately slow permeability above the 2C horizon and rapid in the 2C horizon.
USE AND VEGETATION: Maybee soils are used for irrigated grass hay and irrigated pasture. The vegetation is mainly Garrison creeping foxtail, meadow foxtail, timothy, tufted hairgrass, and other miscellaneous sedges, rushes and forbs.
DISTRIBUTION AND EXTENT: Maybee soils are not extensive in the intermountain valleys of southwestern Montana.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Beaverhead County, Montana, Big Hole Valley Area, 2005.
REMARKS: Diagnostic horizons and features recognized in this pedon are: a mollic epipedon from 2 to 12 inches (A1 and A2 horizons); an argillic horizon from 12 to 27 inches (Bt1and Bt2 horizons); horizons with redox concentrations from 2 to 60 inches (A1, A2, Bt1, Bt2 and 2C horizons); a particle-size control section from 12 to 40 inches (Bt1, Bt2 and 2C horizons). Wisdom soils have a cryic temperature regime and an ustic moisture regime.