LOCATION LOSTINE OR+ID+WYEstablished Series
TAXONOMIC CLASS: Coarse-silty, mixed, superactive, frigid Pachic Haploxerolls
TYPICAL PEDON: Lostine silt loam, meadow. (Colors are for moist soil unless otherwise noted; when described in 8/94 the soil was dry throughout.)
A1--0 to 5 cm; black (10YR 2/1) silt loam, very dark gray (10YR 3/1) dry; moderate medium and fine granular structure; soft, friable, slightly sticky and slightly plastic; many very fine and fine roots; common irregular pores; neutral (pH 6.8); clear smooth boundary.
A2--5 to 30 cm; black (10YR 2/1) silt loam, very dark gray (10YR 3/1) dry; weak medium and fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine and common fine roots; few fine and medium tubular pores; neutral (pH 7.2); clear smooth boundary. (The combined thickness of the A horizons is 28 to 64 cm.)
Bw--30 to 58 cm; very dark grayish brown (10YR 3/2) silt loam, dark grayish brown (10YR 4/2) dry; moderate medium and fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common very fine and fine roots; common very fine and fine tubular pores; slightly alkaline (pH 7.4); abrupt smooth boundary. (23 to 110 cm thick)
BC--58 to 119 cm; dark yellowish brown (10YR 4/4) silt loam, light yellowish brown (10YR 6/4) dry; weak medium and fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common very fine roots; many very fine and fine and few medium tubular pores; neutral (pH 6.8); gradual wavy boundary. (0 to 61 cm thick)
C1--119 to 152 cm; 75 percent brown (10YR 5/3) and 25 percent light yellowish brown (10YR 6/4) silt loam, 75 percent light brownish gray (10YR 6/2) and 25 percent very pale brown (10YR 8/4) dry; massive; slightly hard, friable, moderately sticky and moderately plastic; many very fine and fine tubular pores; neutral (pH 6.8); abrupt smooth boundary.(51 to 102 cm thick)
C2--152 to 165 cm; variegated with matrix color brown (10YR 4/3) very gravelly sandy loam, brown (10YR 5/3) dry; massive; slightly hard, friable, nonsticky and nonplastic; 10 percent coarse gravel, and 35 percent fine gravel; neutral (pH 6.8).
TYPE LOCATION: Wallowa County, Oregon; about 29 kilometers northeast of Enterprise and about 8 kilometers north of Findley Buttes, about 1.6 kilometers west of the Zumwalt road, on the second terrace above the flood plain along Pine Creek, 152 meters south and 732 meters east of the northwest corner of section 36, T 2 N., R. 46 E.; Elk Mountain SE USGS topographic quadrangle; lat. 45 degrees, 37 minutes, 20 seconds N. and long. 117 degrees, 00 minutes, 10 seconds W., NAD83.
RANGE IN CHARACTERISTICS:
Mollic epipedon thickness: 50 to 130 cm thick
Particle size control section total clay: clay content of 10 to 18 percent and has less than 15 percent coarser than very fine sand
Depth to very gravelly loam or sandy loam: greater than 100 cm
Mean annual soil temperature: 5.0 to 7.8 degrees C. (frigid soil temperature regime)
Mean summer soil temperature: 15.0 to 18.9 degrees C.
Reaction: slightly acid to slightly alkaline
A or Ap horizons
Value: 2 or 3 moist, 3 or 4 dry
Chroma: 1 or 2 moist and dry
Bw horizon
Hue: 7.5YR or 10YR moist
Value: 3 or 4 moist, 4 to 6 dry
Chroma: 2 or 3 moist and dry
BC horizon (when present)
Value: 3 or 4 moist, 5 or 6 dry
Chroma: 3 or 4 moist and dry
Texture: SIL or VFSL
C horizon
Value: 3 to 6 moist, 5 to 8 dry
Chroma: 2 to 4 moist and dry
Texture (below 100 cm): SL, SIL, L, or SICL with 0 to 50 percent gravel, 0 to 5 percent cobbles
Clay content: 10 to 30 percent
COMPETING SERIES: This is the Sarilda series. Sarilda soils are 50 to 100 cm deep to bedrock.
GEOGRAPHIC SETTING:
Landscape: outwash plains, alluvial plains, and plateaus
Landform: swales on loess hills, terraces, and fans
Elevation: 914 to 2033 meters
Slope: 0 to 30 percent
Parent material: loess and mixed alluvium including loess and volcanic ash
Mean annual air temperature: 2.2 to 7.2 degrees C.
Mean annual precipitation: 305 to 559 mm
Frost free period: 40 to 100 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Harlow, Josset, Minam, Powwatka, and Redmount soils. Harlow soils are on adjacent hillslopes, are shallow to bedrock and clayey-skeletal. Josset soils are on slightly lower floodplains and are coarse-loamy over sandy skeletal. Minam soils are on slightly higher fans and are fine-loamy. Powwatka soils are on adjacent rolling hills, are moderately deep to bedrock and fine-silty. Redmount soils are on slightly lower outwash plains and are coarse-loamy with silt loam over very gravelly sandy loam in the control section.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class: well
Runoff: medium
Saturated Hydraulic Conductivity: moderately high
USE AND VEGETATION:
Major uses: alfalfa hay, pasture and small grain
Dominant native vegetation: Idaho fescue predominates in the natural vegetation with small amounts of related forbs
DISTRIBUTION AND EXTENT:
Distribution: Northeast Oregon, Southeast Idaho and Western Wyoming, MLRA 9 and 13.
Extent: the series is moderately extensive
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Fremont County, Idaho, 1989; Fremont County Soil Survey.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon: from a depth of 0 to 58 cm
Particle-size control section: from a depth of 25 to 100 cm
Soil temperature regime: frigid
Soil moisture regime: xeric
ADDITIONAL DATA:
Lab data from NSSL, Lincoln, NE:
Typical pedon was not sampled.
Additional reference sample is PEDON ID S83ID-043-004.