LOCATION MILK ID
Established Series
Rev. CBR/TDT
04/2011
MILK SERIES
The Milk series consists of moderately deep, well drained soils formed in residuum weathered from rhyolite with a loess influence. Milk soils are on hills and have slopes of 0 to 30 percent. The mean annual precipitation is about 530 mm and the mean annual air temperature is about 3.9 degrees C.
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, frigid Calcic Argixerolls
TYPICAL PEDON: Milk silt loam on a hill with an 11 percent slope at an elevation of 1,895 meters. (Colors are for dry soil unless otherwise noted.)
A--0 to 20 cm; grayish brown (10YR 5/2) silt loam, very dark brown (7.5YR 2.5/2) moist; strong fine granular structure; soft, very friable, nonsticky and nonplastic; many very fine and common fine and medium roots; common very fine and fine irregular pores; 5 percent gravel; moderately acid (pH 6.0); gradual wavy boundary. (20 to 28 cm thick)
AB--20 to 35 cm; brown (10YR 4/3) loam, dark brown (7.5YR 3/3) moist; moderate medium subangular blocky structure; slightly hard, friable, slightly sticky and nonplastic; common very fine, fine, and medium roots; common very fine tubular and very fine irregular pores; 10 percent gravel; neutral (pH 6.8); clear wavy boundary. (0 to 15 cm thick)
Bt--35 to 57 cm; brown (10YR 5/3) very gravelly clay loam, dark brown (7.5YR 3/4) moist; strong medium subangular blocky structure; hard, friable, moderately sticky and moderately plastic; common very fine and few fine roots; common fine and medium tubular and medium irregular pores; few (10 percent) distinct clay films on all ped faces; 45 percent gravel; neutral (pH 7.3); abrupt wavy boundary. (22 to 48 cm thick)
Bk--57 to 72 cm; pale brown (10YR 6/3) extremely gravelly loam, light brown (7.5YR 6/4) moist; strong coarse subangular blocky structure; hard, friable, moderately sticky and slightly plastic; few very fine roots; common fine irregular and very fine tubular pores; calcium carbonate coats on rock fragments; common (12 percent) masses of calcium carbonate; 45 percent gravel and 15 percent flagstones; strongly effervescent (42 percent calcium carbonate equivalent); moderately alkaline (pH 8.1); abrupt wavy boundary. (15 to 30 cm thick)
R--72 to 152 cm; rhyolite
TYPE LOCATION: Teton County, Idaho; about 3.8 km northeast of Tetonia; 425 meters west and 768 meters south of the northeast corner of section 16, T. 6 N., R. 45 E.;
Tetonia USGS topographic quadrangle; lat. 43 degrees, 50 minutes, and 48.3 seconds N. and long. 111 degrees, 8 minutes, 43.4 seconds W., NAD83.
RANGE IN CHARACTERISTICS:
Mollic epipedon thickness: 30 to 50 cm
Depth to argillic horizon: 17 to 35 cm
Depth to calcic horizon: 35 to 78 cm
Calcium carbonate equivalet in the calcic horizon: 15 to 45 percent
Particle size control section average rock fragments: 40 to 90 percent
Particle size control section total clay: 22 to 35 percent
Reaction: moderately acid to moderately alkaline
Soil moisture regime: xeric
Mean annual soil temperature: 5.0 to 8.0 degrees C. (frigid soil temperature regime)
Mean summer soil temperature: 15.0 to 18.3 degrees C.
A or Ap horizon
Hue: 7.5YR or 10YR moist
Value: 2.5 or 3 moist, 4 or 5 dry
Chroma: 1 or 2 moist, 2 or 3 dry
Rock fragments: 5 to 10 percent gravel
Bt or Btk horizon
Hue: 7.5YR or 10YR moist
Value: 3 or 4 moist, 4 to 6 dry
Chroma: 3 or 4 moist
Fine-earth texture: CL or SCL with 45 to 90 percent fragments; 20 to 50 percent gravel, 0 to 25 percent cobbles, 0 to 25 percent channers, 0 to 45 percent stones, and 0 to 45 percent flagstones
Bk horizon
Hue: 7.5 YR or 10YR moist
Value: 4 to 6 moist
Chroma: 2 to 4 moist
Fine-earth texture: L, CL, or SCL with 60 to 90 percent fragments; 10 to 50 gravel, 0 to 25 percent cobbles, 0 to 25 percent channers, 15 to 45 percent stones, and 15 to 45 percent flagstones
COMPETING SERIES: These are the
Amelar,
Broad,
Custco,
Dra,
Drage,
Rawnjay,
Remount,
Scalfar,
Searla,
Sheep Creek,
Small and
Swampydraw, series. Amelar, Custco, Dra, Drage, Rawnjay, Remount, Scalfar, Searla, and Swampydraw soils very deep. Broad and Sheep Creek soils do not have flagstones in the particle size control section. Small soils have a calcic horizon that starts between 8 to 13 cm deep and do not contain flagstones in the particle size control section.
GEOGRAPHIC SETTING:
Landscape: plateaus
Landform: hills
Elevation: 1,817 to 2,133 meters
Slope: 0 to 30 percent
Parent material: residuum weathered from rhyolite with a loess influence
Mean annual air temperature: 3.3 to 5.6 degrees C.
Mean annual precipitation: 405 to 660 mm
Frost free period: 40 to 70 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Bull,
Conneridge, and
Parkalley soil series. Bull, Conneridge, and Parkalley all occur on the same landform. Bull soils are deep and occur on linear/concave positions. Conneridge soils lack an argillic horizon and occur on shoulder positions. Parkalley soils are very deep and occur on north-facing slopes.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class: well
Runoff: medium
Saturated hydraulic conductivity: moderately low
USE AND VEGETATION:
Major uses: dryland wheat, barley, hay, and range
Dominant native vegetation: mountain big sagebrush, Idaho fescue, and arrowleaf balsamroot
DISTRIBUTION AND EXTENT:
Distribution: Southeastern Idaho and Western Wyoming, MLRA 13
Extent: the series is not extensive
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon.
SERIES ESTABLISHED: Teton County, Idaho, 2011; Teton Area, Idaho and Wyoming Soil Survey.
REMARKS:
Diagnostic horizons and soil characteristics recognized in this pedon are:
Mollic epipedon: from a depth of 0 to 35 cm
Argillic horizon: from a depth of 35 to 57 cm
Calci horizon: from a depth of 57 to 72 cm
Bedrock: at a depth of 72 cm
Particle size control section: from a depth of 35 to 57 cm
Soil temperature regime: frigid
Soil moisture regime: xeric
ADDITIONAL DATA:
Typical pedon was not sampled.
National Cooperative Soil Survey
U.S.A.