LOCATION LEMKE OR
Tentative Series
IRD. SCW/KMS
05/2013
LEMKE SERIES
The Lemke series consists of shallow to a densic layer, well drained soils formed in glaciofluvial deposits with an influence of volcanic ash in the surface. They are on fan remnants. Slopes are 2 to 20 percent. The mean annual precipitation is about 17 inches (430 millimeters), and the mean annual temperature is about 6 degrees C.
TAXONOMIC CLASS: Loamy, isotic, frigid, shallow Vitrandic Haploxerolls
TYPICAL PEDON: Lemke ashy loam - woodland, on a 3 percent slope at an elevation of 1,490 meters. (When described on October 19, 2011, the soil was moist to 13 centimeters but dry below 13 centimeters. Colors are for moist soil unless otherwise noted.)
Oi--0 to 0.5 inches (0 to 2 cm); slightly decomposed pine needles, twigs, and dried grass
A--0.5 to 5 inches (2 to 13 cm); very dark grayish brown (10YR 3/2) ashy loam, grayish brown (10YR 5/2) dry; moderate fine granular structure; moderately hard, firm, slightly sticky and slightly plastic; few fine and common very fine roots; few fine and common very fine irregular pores; slightly alkaline (pH 7.6); clear smooth boundary. (10 to 18 centimeters thick)
Bw--5 to 13 inches (13 to 33 cm); dark brown (10YR 3/3) ashy clay loam, brown (10YR 4/3) dry; moderate medium subangular blocky structure; hard, very firm, moderately sticky and moderately plastic; few coarse and common medium, fine, and very fine roots; few medium, fine, and very fine tubular pores; 5 percent gravel; neutral (pH 7.0); abrupt smooth boundary. (13 to 40 centimeters thick)
2Cd1--13 to 39 inches (33 to 99 cm); dark yellowish brown (10YR 4/4) dense glacial till crushed to extremely gravelly sandy clay loam, yellowish brown (10YR 5/4) dry; massive; extremely hard, slightly-rigid, moderately sticky and moderately plastic; few fine and very fine roots; few fine and very fine tubular pores; 80 percent sub-rounded gravel; slightly alkaline (pH 7.4); abrupt wavy boundary.
2Cd2--39 to 42 inches (99 to 107 cm); dark yellowish brown (10YR 3/4) dense glacial till crushed to very gravelly sandy loam, yellowish brown (10YR 5/4) dry; massive; moderately hard, firm, nonsticky and nonplastic; 45 percent gravel; neutral (pH 7.2); abrupt wavy boundary.
2Cd3--42 to 50 inches (107 to 127 cm); dark brown (10YR 3/3) dense glacial till crushed to cobbly loam, brown (10YR 4/3) dry; massive; hard, very firm, slightly sticky and slightly plastic; 10 percent cobbles and 10 percent gravel; slightly alkaline (pH 7.4); abrupt wavy boundary. (The combined thickness of the 2Cd horizons is 76 to 104 centimeters.)
3Cr--50 to 60 inches (127 to 152 cm); dark yellowish brown (10YR 4/4) mudstone, light yellowish brown (10YR 6/4) dry.
TYPE LOCATION: Grant County, Oregon, located about 9.5 miles northwest of the town of Seneca; 50 feet east and 1,700 feet south of the NW corner of section 9, T. 16 S., R. 30 E.
Latitude: 44.201248
Longitude: -119.13478
Datum: WGS84
RANGE IN CHARACTERISTICS:
Dry days: Usually moist, but are dry in all parts of the moisture control section for 60 to 90 days consecutive days following the summer solstice.
Mean annual soil temperature: 6 to 8 degrees C
Depth to dense till: 25 to 50 cm
Depth to paralithic contact; 100 to 150 cm
Thickness of mollic epipedon: 25 to 50 cm
Reaction: neutral or slightly alkaline
Volcanic ash influenced layers:
Thickness: 18 to 36 cm
Volcanic glass content in the 0.02 to 2.0 mm fraction - 5 to 20 percent
Ammonium oxalate extractable Al plus Fe - 0.4 to 1.0 percent
Particle Size Control Section:
Clay Content: 15 to 35 percent
Total Rock Fragment Content: 5 to 20 percent
A horizon
Value: 2 or 3 moist, 4 or 5 dry
Chroma: 2 or 3, moist or dry
Clay content: 15 to 25 percent
Gravel content: 0 to 10 percent
Bw horizon
Value: 2 or 3 moist, 4 or 5 dry
Chroma: 2 or 3, moist or dry
Clay content: 27 to 35 percent
Gravel content: 5 to 20 percent
2Cd horizons
Value: 3 or 4 moist, 5 to 7 dry
Chroma: 3 to 5, moist or dry
Fine earth texture: loam, sandy clay loam, clay loam, or clay
Clay content: 20 to 45 percent
Gravel content: 5 to 80 percent
Cobble content: 0 to 20 percent
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: Lemke soils are on fan remnants. They formed in glaciofluvial deposits with an influence of ash in the surface horizons. Slopes are 2 to 20 percent. The climate is characterized by cold, wet winters and hot, dry summers. Elevation is 1,370 to 1,525 meters. The mean annual precipitation is 14 to 20 inches (350 to 500 millimeters), and the mean annual temperature is 5 to 7 degrees C. The frost free period is 30 to 80 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Fopiano,
Gerow,
Herberger (T),
Laycock,
Luckycreek,
Pothole (T),
Prag,
Rastus,
Silvies,
Skullgulch,
Southworth (T), and
Sylvaille (T). All of these soils lack an 'O' horizon except for Laycock and Southworth soils. Fopiano and Prag soils are found on sideslopes of fan remnants. Fopiano soils are shallow to a paralithic contact whereas Prag is moderately deep. Gerow and Silvies soils are located on broad floodplains. Gerow and Silvies soils have redoximorphic concentrations within 76 centimeters of the soil surface. Herberger and Sylvaille soils are on outwash plains and fan remnants and lack an "O" horizon. Furthermore, they lack sufficient thickness of ash to qualify as a vitrandic layer. Laycock and Southworth soils are on hills, have an "O" horizon, and are shallow and moderately deep to shale bedrock, respectively. Luckycreek soils are on broad terraces, are fine-loamy, and very deep to any bedrock. Pothole soils occur as bowl-shaped depressions on fan remnants and are in the "fine-loamy over clayey" family. Rastus soils are moderately deep to a duripan and are located on fan remnants with Herberger soils. Skullgulch soils are in small swales of fan remnants and lack any root restrictive layer and are in the fine family.
DRAINAGE AND PERMEABILITY: Well drained; permeability is moderately slow to the compacted layer, but very slow within the compacted layer.
USE AND VEGETATION: These soils are used for timber production, livestock grazing and wildlife habitat. The native potential vegetation is Ponderosa Pine and elk sedge.
DISTRIBUTION AND EXTENT: East-central Oregon, MLRA-10. Series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES PROPOSED: Grant County, Oregon, 2012. The name is derived from a Bear Valley ranch owned by the Lemke family.
REMARKS: Diagnostic horizons and features in this pedon are:
Mollic epipedon - from the surface to 33 centimeters (A and Bw horizons)
Cambic horizon - from13 to 33 centimeters (Bw horizon)
Densic layer - 33 to 127 centimeters (2Cd horizons)
Paralithic contact - 127 centimeters (3Cr horizon)
Particle size control section - 0 to 33 centimeters (A and Bw horizons)
Soil moisture regime: Xeric
National Cooperative Soil Survey
U.S.A.