LOCATION LABUCK OR+ID
Established Series
Rev. DFA-AON-KLS
03/2023
LABUCK SERIES
The Labuck series consists of moderately deep, well drained soils that formed in colluvium and residuum weathered from granodiorite with an influence of ash and loess in the surface. Labuck soils are on hillslopes of uplands and have slopes of 5 to 35 percent. The mean annual precipitation is about 560 mm and the mean annual air temperature is about 6 degrees C.
TAXONOMIC CLASS: Coarse-loamy, isotic, frigid Vitrandic Haploxerepts
TYPICAL PEDON: Labuck loam, forested. (Colors are for moist soil unless otherwise noted.)
Oi--0 to 3 cm; pine needles and twigs.
A--3 to 18 cm; brown (10YR 4/3) loam, light brownish gray (10YR 6/2) dry; weak fine granular and weak fine subangular blocky structure; slightly hard, friable, nonsticky and nonplastic; many very fine and fine roots; many very fine tubular pores; 10 percent fine gravel, 2 to 6 mm in diameter; slightly acid (pH 6.4); gradual wavy boundary. (13 to 25 cm thick)
Bw1--18 to 38 cm; yellowish brown (10YR 5/4) loam, pale brown (10YR 6/3) dry; weak medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine and fine roots; many very fine tubular pores; 10 percent fine gravel, 2 to 6 mm in diameter; slightly acid (pH 6.2); gradual wavy boundary. (18 to 41 cm thick)
Bw2--38 to 56 cm; yellowish brown (10YR 5/4) gravelly loam, pale brown (10YR 6/3) dry; slightly hard, friable, slightly sticky and slightly plastic; common very fine and fine roots; common very fine irregular pores; 20 percent fine gravel, 2 to 6 mm in diameter; moderately acid (pH 6.0); gradual wavy boundary. (18 to 36 cm thick)
C--56 to 81; yellowish brown (10YR 5/4) very gravelly coarse sandy loam, pale brown (10YR 6/3) dry; massive; hard, friable, 36 percent gravel; moderately acid (pH 6.0); clear wavy boundary. (0 to 30 cm thick)
Cr--81 cm; yellowish brown (10YR 5/4) partially decomposed granodiorite, light yellowish brown (10YR 6/4) dry.
TYPE LOCATION: Morrow County, Oregon; SE , SE , NE , sec. 9, T. 4 S., R. 29 E.
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--7 to 8 degrees C
Soil moisture--These soils are usually moist but are dry throughout between depths of 10 and 30 cm for 60 to 80 consecutive days during the summer.
Solum thickness--25 to 75 cm
Depth to paralithic contact--50 to 100 cm
Rock fragment content--5 to 15 percent in the A horizon and 15 to 35 percent in the B and C horizons; dominantly fine gravel throughout
Particle size control section:
Texture--loam to coarse sandy loam
Clay content--10 to 18 percent
The upper 18 to 36 cm is estimated to have:
Bulk density--1.10 to 1.35 g/cc
Volcanic glass content--5 to 20 percent
Aluminum plus one-half iron content, by acid oxalate--0.4 to 1.0 percent
A horizon
Hue--10YR or 7.5YR
Value--2 to 4 moist, 4 to 6 dry
Chroma--2 or 3, moist and dry
Structure--weak granular or subangular blocky
Bw horizon
Hue--10YR or 7.5YR
Value--3 or 4 moist, 5 to 7 dry
Chroma--3 or 4 moist, 2 to 4 dry
Structure--weak or moderate medium subangular blocky
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING:
Landform--south-facing hill slopes
Elevation--1075 to 1425 meters
Slope--5 to 35 percent
Parent material--colluvium weathered from granodiorite with an influence of volcanic ash and loess in the surface
Climate--hot dry summers and cold wet winters
Mean annual precipitation--510 to 660 mm
Mean annual air temperature--6 to 7 degrees C
Mean summer air temperature--16 degrees C
Mean winter air temperature--minus 1 degree C
Frost-free period--50 to 100 days
GEOGRAPHICALLY ASSOCIATED SOILS: None listed.
DRAINAGE AND PERMEABILITY: Well drained; moderate permeability.
USE AND VEGETATION: Principal use is timber production. Other uses include grazing, wildlife habitat, and recreation. Vegetation is mainly ponderosa pine, Douglas-fir, and oceanspray.
DISTRIBUTION AND EXTENT: Labuck soils are of small extent in northeast Oregon and northern Idaho; MLRAs 43A and 43C.
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Morrow County, Oregon, 1977
REMARKS: Diagnostic horizons and features in this pedon are:
Ochric epipedon--3 to 18 cm (A horizon)
Cambic horizon--18 to 56 cm (Bw1 and Bw2 horizons)
Particle-size control section--25 to 81 cm (part of the Bw1, all of Bw2 and C horizons)
ADDITIONAL DATA: Characterization data for one pedon (S76-OR-49-1) from Oregon State University. The classification was changed from mixed to isotic minerology, 06/1999.
Converted to metric and O horizons were updated to start at zero. Competing series section was not updated. 02/2023
National Cooperative Soil Survey
U.S.A.