LOCATION UHLIG WA+ID

Established Series
Rev. NCD/EMM/RWL
02/2024

UHLIG SERIES

Landscape--channeled scablands
Landform--outwash terraces
Slope--0 to 35 percent
Parent material--glaciofluvial deposits and alluvium mixed with loess and volcanic ash in upper part
Mean annual precipitation--about 460 mm
Mean annual air temperature--about 9 degrees C
Depth class--very deep
Drainage class--well drained
Soil moisture regime--xeric
Soil temperature regime--mesic
Soil moisture subclass--typic

TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, mesic Vitrandic Haploxerolls

TYPICAL PEDON: Uhlig ashy silt loam, cultivated

Ap1--0 to 10 cm; ashy silt loam, dark gray (10YR 4/1) dry, black (10YR 2/1) moist; weak fine and medium granular structure; slightly hard, very friable, slightly sticky and slightly plastic; many very fine and fine roots; common fine irregular pores; moderately acid (pH 6.0); abrupt smooth boundary

Ap2--10 to 25 cm; ashy silt loam, gray (10YR 5/1) dry, very dark gray (10YR 3/1) moist; moderate thin and medium platy structure; slightly hard, very friable, slightly sticky and slightly plastic; many very fine and fine roots; common fine irregular pores; slightly acid (pH 6.3); abrupt smooth boundary

A--25 to 46 cm; ashy loam, dark grayish brown (10YR 4/2) dry, very dark brown (10YR 2/2) moist; weak medium subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; many very fine and fine roots; common very fine irregular pores; neutral (pH 6.6); clear wavy boundary

2Bt1--46 to 81 cm; loam, brown (10YR 5/3) dry, dark brown (10YR 3/3) moist; weak coarse prismatic structure parting to moderate medium subangular blocky; hard, firm, slightly sticky and slightly plastic; common fine roots; many very fine irregular pores; few faint patchy clay films on faces of peds and on surfaces of pores; neutral (pH 6.6); clear wavy boundary

2Bt2--81 to 107 cm; loam, pale brown (10YR 6/3) dry, brown (10YR 4/3) moist; weak coarse prismatic structure; slightly hard, friable, slightly sticky and slightly plastic; common fine roots; common fine irregular pores; few faint clay films on surfaces of pores; many nodules 6 to 10 mm in diameter that are brown (7.5YR 4/4) moist; neutral (pH 6.8); gradual wavy boundary

2C--107 to 150 cm; very fine sandy loam, very pale brown (10YR 7/3) dry, brown (10YR 5/3) moist; massive; slightly hard, very friable, slightly sticky and nonplastic; few roots; many very fine and few fine interstitial pores; neutral (pH 6.8)

TYPE LOCATION: Spokane County, Washington, about 5 km north of Millwood, Washington, directly under power line, about 305 m north and 30 m west of the end of Scott Road; about 500 m south and 370 m east of the northwest corner of section 20, T. 26 N., R. 44 E.; Spokane NE, Washington, U.S. Geological Survey topographic quadrangle; latitude 47.7391663, longitude -117.2780533, datum WGS 84 (coordinates estimated from PLSS details)

RANGE IN CHARACTERISTICS:
Mean annual soil temperature at a depth of 50 cm--8 to 11 degrees C
Moisture control section--usually moist, but dry in all parts between depths of 10 and 30 cm 60 to 75 consecutive days in summer and fall
Thickness of mollic epipedon--50 to 90 cm; may include part of 2Bt or 2Bw horizon
Thickness of layers influenced by volcanic ash--25 to 75 cm

Estimated properties of layers influenced by volcanic ash
*Content of volcanic glass in 0.02- to 2-mm fraction--5 to 20 percent
*Acid oxalate Al plus 1/2 Fe--0.4 to 1.0 percent
*Moist bulk density--1.20 to 1.40 g/cm3

Particle-size control section
*Content of clay--averages 5 to 18 percent
*Content of particles coarser than very fine sand--more than 15 percent

Ap horizon
*Combined thickness--20 to 50 cm

A horizon
*Value--2 or 3 moist, 4 or 5 dry
*Chroma--1 or 2 dry or moist
*Texture--ashy loam, ashy silt loam, ashy very fine sandy loam
*Content of clay--5 to 18 percent
*Content of gravel--0 to 5 percent
*Reaction--5.6 to 7.3
*Thickness--10 to 25 cm

2Bt horizon, or 2Bw horizon (where present)
*Value--3 to 5 moist, 5 to 7 dry
*Chroma--3 or 4 dry or moist
*Texture--loam, silt loam, or very fine sandy loam in upper part; silt loam, loam, very fine sandy loam, or sandy loam in lower part
*Content of clay--5 to 18 percent
*Clay films--none or few, faint
*Content of gravel--0 to 5 percent in upper part; 0 to 15 percent in lower part
*Reaction--6.1 to 7.3
*Thickness of 2Bt horizon--55 to 90 cm

2C horizon (where present)
*Value--3 to 5 moist, 5 to 7 dry
*Chroma--3 or 4 dry or moist
*Texture--fine sandy loam, loam, sandy loam, very fine sandy loam
*Content of clay--5 to 15 percent
*Reaction--6.6 to 7.8
*Content of gravel--0 to 20 percent
*Secondary carbonates--present in some pedons

A 3Btkb horizon is in some pedons.

COMPETING SERIES:
Cabincreek--100 to 150 cm to lithic contact; dry 75 to 120 consecutive days in summer
Conconully, Stevens--50 to 100 cm deep to Cd horizon
Deno--lithic contact at a depth of 100 to 150 cm
Doublecreek--dry 75 to 120 days consecutive days in summer
Fanal--moderately well drained; redoximorphic concentrations in lower part of control section
Phoebe--typically sandy loam and fine sandy loam throughout; sandy loam, loamy sand, or sand substratum at a depth of 75 to 150 cm
Safety--paralithic contact at a depth of 50 to 100 cm

GEOGRAPHIC SETTING:
Elevation--245 to 945 m
Climate--warm, dry summers; cool, moist winters
Mean annual precipitation--380 to 585 mm
Mean January air temperature--about -2 degrees C
Mean July air temperature--about 19 degrees C
Mean annual air temperature--7 to 11 degrees C
Frost-free period--typically 100 to 140 days; 150 to 175 days in Idaho

GEOGRAPHICALLY ASSOCIATED SOILS:
Athena, Calouse, Palouse, Thatuna--fine-silty; on loess hillslopes
Hesseltine, Cheney--underlain by sand, gravel, and cobbles at a depth of 50 to 100 cm; on outwash plains
Tucannon--fine-silty; on benches and plateaus of channeled scablands

DRAINAGE AND PERMEABILITY:
Drainage class--well drained
Saturated hydraulic conductivity (Ksat)--moderately high

USE AND VEGETATION:
Use--dominantly production of cultivated crops and pasture
Principal crop--small grain
Native vegetation--Idaho fescue, bluebunch wheatgrass, common snowberry, rose

DISTRIBUTION AND EXTENT: Eastern Washington and Oregon, western Idaho; MLRA 9; moderate extent

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: BOZEMAN, MONTANA

SERIES ESTABLISHED: Spokane, Washington; 1961

REMARKS:
Diagnostic horizons and other features in this pedon
*Mollic epipedon--zone from 0 to 81 cm
*Cambic horizon--zone from 46 to 107 cm; oriented clay, but no increase in content of clay from overlying horizon
*Particle-size control section--zone from 25 to 100 cm
*Vitrandic feature--zone from surface to a depth of 46 cm

This series is correlated to the PIPO/AGSP habitat type.

5/2000--The classification was changed from coarse-loamy, mixed, mesic Pachic Haploxerolls to coarse-loamy, mixed, superactive, mesic Vitrandic Haploxerolls based on a revision to Soil Taxonomy.

This pedon does not meet the criteria for an argillic horizon because there is no increase in the content of clay from the A horizon to the 2Bt1 horizon.

The discontinuity at the 2Bt1 horizon represents the limit of the vitrandic feature and the influence of airfall volcanic ash and loess.

The 3Btkb horizon, where present, has been correlated to a clayey substratum phase.

6/2016--This official series description (OSD) was updated as part of the final correlation of the Spokane County, Washington, soil survey. The formatting was updated according to SSR1 Technical Note 11--Content and Format of Official Series Descriptions (revised 12/2015).

ADDITIONAL DATA:
Reference laboratory data--sample number S99WA-063-006; Kellogg Soil Survey Laboratory, Lincoln, Nebraska

National Cooperative Soil Survey
U.S.A.