LOCATION KUCKUP OREstablished Series
TAXONOMIC CLASS: Medial over pumiceous or cindery, amorphic over glassy Vitric Haplocryands
TYPICAL PEDON: Kuckup gravelly sandy loam - on a 20 percent slope, woodland. (Colors are for moist soil unless otherwise noted.)
0i--1 inches to 0; organic layer of needles and twigs.
A--0 to 6 inches; dark brown (10YR 3/3) gravelly sandy loam, brown (10YR 5/3) dry; weak fine granular structure; soft, friable, nonsticky and nonplastic; many very fine, fine, and medium roots; many very fine, fine, and medium irregular pores; 25 percent cinder gravel and 10 percent 0.5mm to 2.0mm cinders; slightly acid (pH 6.2); clear smooth boundary. (5 to 8 inches thick)
Bw1--6 to 13 inches; dark brown (7.5YR 3/3) gravelly sandy loam, brown (7.5YR 5/4) dry; moderate fine and medium subangular blocky structure; slightly hard, friable, nonsticky and nonplastic; many very fine, fine, and few medium and coarse roots; many very fine, fine, and few medium and coarse tubular pores; 25 percent cinder gravel and 10 percent 0.5mm to 2.0mm cinders; neutral (pH 6.6); clear smooth boundary. (5 to 8 inches thick)
Bw2--13 to 29 inches; dark reddish brown (5YR 3/4) gravelly sandy loam, reddish brown (5YR 5/4) dry; moderate fine and medium subangular blocky structure; slightly hard, friable, nonsticky and nonplastic; common fine and medium roots; common fine and medium tubular pores; 30 percent cinder gravel and 15 percent 0.5mm to 2.0mm cinders; neutral (pH 6.8); gradual wavy boundary. (10 to 18 inches thick)
2C--29 to 60 inches; reddish brown (5YR 4/3) cinders, light reddish brown (5YR 6/4) dry; single grain; loose, nonsticky and nonplastic; few very fine and fine roots; common very fine and fine vesicular pores; less than 10 percent of voids filled; neutral (pH 6.8)
TYPE LOCATION: Wasco County, Oregon, about 1500 feet east and 1500 feet south of the NW corner of section 7, T.6 S., R.8 E. (Latitude 45 degrees, 04 minutes, 00 seconds N, Longitude 121 degrees, 43 minutes, 12 seconds W) Warm Springs Indian Reservation.
RANGE OF CHARACTERISTICS: These soils are usually moist and are not dry in all parts of the soil moisture control section for as long as 45 consecutive days in the four months that follow the summer solstice. The mean annual soil temperature is 36 to 38 degrees F. Thickness of the solum and depth to cinders is 20 to 30 inches. Depth to bedrock is greater than 60 inches. The solum has a phosphate retention of more than 85 percent, acid oxalate extractable aluminum plus one-half iron of 2 to 5 percent in the less than 2.0 mm fraction, 25 to 40 percent volcanic glass and glass aggregate and 15-bar water of 15 to 20 percent on air-dried samples. The moist bulk density is 0.80 to 0.90g/cc. The particle-size control section averages 20 to 35 percent cinders in the upper part and 90 percent or more cinders in the lower part.
The A horizon has hue of 10YR or 7.5YR, value of 2 or 3 moist, 4 or 5 dry and chroma of 2 or 3 moist and dry. It contains 20 to 30 percent cinder gravel and a field estimated clay content of 5 to 10 percent.
The Bw horizon has hue of 7.5YR or 5YR, value of 3 or 4 moist, 5 or 6 dry and chroma of 3 or 4 moist and dry. It contains 25 to 35 percent cinder gravel and a field estimated clay content of 5 to 15 percent.
The 2C horizon has hue of 7.5YR, 5YR or 2.5YR, value of 3 or 4 moist, 4 to 6 dry and chroma of 2 to 6 moist and dry. It contains 80 to 100 percent cinders which are all gravel size.
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: Kuckup soils are on moderately steep to steep side slopes of cinder cones. Elevations range from 3800 to 6100 feet. Slopes are 15 to 40 percent. The soil formed in volcanic ash and cinders. The climate is characterized by cold and wet winters and cool and moist summers. The mean annual precipitation is 80 to 110 inches. The mean annual temperature is 34 to 36 degrees F. The frost-free period is 10 to 30 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Jojo, Pinhead and Piumpsha soils. Jojo soils are medial-skeletal, somewhat excessively drained, moderately deep to pyroclastic material and are on ridgetops and convex side slopes. Pinhead soils are medial-skeletal, somewhat excessively drained and are on ridgetops and concave side slopes. Piumpsha soils are medial, well drained, and are on benches and gently sloping side slopes.
DRAINAGE AND PERMEABILITY: Excessively drained. Permeability is moderately rapid.
USE AND VEGETATION: These soils are used for timber production, watershed and wildlife habitat. The native vegetation is silver fir, Douglas fir, mountain hemlock, western white pine, and lodgepole pine with an understory of common beargrass, big huckleberry, and grouse blueberry.
DISTRIBUTION AND EXTENT: North-central Oregon; MLRA 3. The soils of this series are not extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Warm Springs Indian Reservation, Wasco County, Oregon, 1993.
REMARKS: Diagnostic horizons an features recognized in this pedon are:
Umbric epipedon - the zone from 0 to 13 inches (A and Bw1 horizons)
Cambic horizon - the zone from 13 to 29 inches (Bw2 horizon).
Andic soil properties - from surface to 29 inches (A, Bw1, and Bw2 horizons) and based on partial laboratory data from the Pinhead series.
Particle-size control section - the zone from 0 to 40 inches. The upper part (0 to 29 inches) averages 28 percent cinders and the lower part (29 to 40 inches) contains 90 percent cinders.