LOCATION LIART MTEstablished Series
TAXONOMIC CLASS: Ashy, glassy Aquandic Cryaquolls
TYPICAL PEDON: Liart mucky silt loam, in rangeland. (Colors are for moist soil unless otherwise noted.)
Oe--0 to 2 inches; very dark grayish brown (10YR 3/2) mucky silt loam, dark gray (10YR 4/1) dry, strongly acid (pH 5.4). (0 to 3 inches thick)
A1--2 to 18 inches; black (10YR 2/1) ashy loam, dark gray (10YR 4/1) dry; moderate coarse angular blocky structure; slightly hard, friable; slightly sticky and slightly plastic; 5 percent pebbles; many very fine roots; moderately acid (pH 6.0); clear wavy boundary. (8 to 17 inches thick)
A2g--18 to 33 inches; very dark brown (10YR 2/2) ashy sandy clay loam, gray (10YR 5/1) dry; moderate coarse prismatic structure parting to moderate medium subangular blocky; slightly hard, friable, slightly sticky and slightly plastic; many very fine and fine roots; 5 percent pebbles; slightly acid (pH 6.2); gradual wavy boundary. (10 to 20 inches thick)
ACg--33 to 40 inches; very dark gray (10YR 3/1) gravelly ashy coarse sandy loam, gray (10YR 5/1) dry; moderate coarse prismatic structure; hard, friable, slightly sticky and nonplastic; 20 percent pebbles; slightly acid (pH 6.2); gradual wavy boundary. (6 to 14 inches thick)
Cg1--40 to 46 inches; very dark gray (5Y 3/1) stratified ashy silt loam and ashy coarse sandy loam, gray (2.5Y 5/1) dry; massive; hard, friable, slightly sticky and slightly plastic; 5 percent pebbles; slightly acid (pH 6.4). (5 to 10 inches thick)
Cg2--46 to 60 inches; olive (5Y 5/3) gravelly ashy coarse sandy loam, gray (2.5Y 5/1) dry; massive; hard, friable, nonsticky and nonplastic; 5 percent cobbles and 20 percent pebbles; slightly acid (pH 6.4).
TYPE LOCATION: Deer Lodge County, Montana; about 2,500 feet north and 1,900 feet east of the southwest corner of Sec. 16, T. 3 N., R. 11 W.
RANGE IN CHARACTERISTICS:
Mean annual soil temperature - 39 to 44 degrees F.
Mean summer soil temperature - 42 to 46 degrees F.
Moisture control section - between 4 and 12 inches.
Depth to seasonal high water table - 0 to 12 inches.
Volcanic glass - 30 to 50 percent in the coarse silt and sand.
Acid oxalate Al + 1/2 Fe - .12 to .20 percent
Mollic epipedon thickness: 20 to 47 inches.
A1 horizon - Value: 3 or 4 dry, 2 or 3 moist
Chroma: 1 or 2
Texture: mucky silt loam, ashy loam or ashy silt loam
Clay content: 15 to 27 percent
Rock fragments: 0 to 15 percent (0 to 5 percent cobbles, 0 to 10 percent pebbles)
Reaction: 5.6 to 6.5
A2g horizon - Value: 3, 4 or 5 dry, 2 or 3 moist
Chroma: 1 or 2
Texture: ashy sandy clay loam, ashy clay loam
or ashy loam
Clay content: 18 to 30
Rock fragments: 0 to 15 percent (0 to 5 percent cobbles; 0 to 10 percent pebbles)
Reaction: 5.6 to 6.5
ACg horizon - Value: 3, 4 or 5 dry, 2 or 3 moist
Chroma: 1 or 2
Texture: ashy coarse sandy loam, ashy loam or ashy sandy clay loam
Clay content: 18 to 30 percent
Rock fragments: 0 to 35 percent (0 to 10 percent cobbles; 0 to 25 percent pebbles)
Reaction: 5.6 to 6.5
Cg1 horizon - Hue: 10YR, 2.5Y or 5Y
Value: 4 or 5 dry, 2 or 3 moist
Chroma: 1 or 2
Texture: stratified ashy coarse sandy loam, ashy silt
loam or ashy loam
Clay content: 18 to 27 percent
Rock fragments: 0 to 35 percent (0 to 10 percent cobbles; 0 to 25 percent pebbles)
Reaction: 5.6 to 6.5
Cg2 horizon - Hue: 10YR, 2.5Y or 5Y
Value: 4, 5 or 6 dry, 4 or 5 moist
Chroma: 1, 2 or 3
Texture: ashy coarse sandy loam, ashy silt loam or ashy loam
Clay content: 18 to 27 percent
Rock fragments: 0 to 35 percent (0 to 10 percent cobbles; 0 to 25 percent pebbles)
Reaction: 5.6 to 6.5
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING:
Landform - high moutain valleys and floodplains.
Elevation - 5,500 to 7,500 feet.
Slope - 0 to 4 percent.
Parent material - tuffaceous alluviuum.
Climate - long, cold winters; cool moist springs; short summers.
Mean annual precipitation - 15 to 25 inches.
Mean annual air temperature - 37 to 43 degrees F.
Frost-free period - 30 to 70 days.
DRAINAGE AND PERMEABILITY: Very poorly drained; moderate permeability.
USE AND VEGETATION: These soils are used as native range. Native vegetation is mainly sedges, rushes, forbs and willows.
DISTRIBUTION AND EXTENT: The Liart series is of small extent in southwestern Montana.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Deer Lodge County, Montana, 1999.
REMARKS: Soil interpretive record: MT1737. Diagnostic horizons and features recognized in this pedon are: a mollic epipedon from the soil surface to 46 inches (Oe, A1, A2g, ACg and C1g horizons); a particle size control section from 10 to 40 inches (A1, A2g, ACg horizons). Liart soils have a cryic temperature regime and an aquic moisture regime.