LOCATION CLOVKAMP OREstablished Series
TAXONOMIC CLASS: Ashy over sandy or sandy-skeletal, glassy over mixed, mesic Vitritorrandic Haploxerolls
TYPICAL PEDON: Clovkamp ashy loamy sand - on a nearly level slope at 3450 feet elevation. ( When described (7/16/90), the soil was dry throughout. Colors are for dry soil unless otherwise noted.)
A1--0 to 4 inches; grayish brown (10YR 5/2) ashy loamy sand, very dark grayish brown (10YR 3/2) moist; weak fine granular structure; soft, friable, nonsticky and nonplastic; many very fine roots; many very fine irregular pores; 10 percent gravel; 50 percent pumice (0.5 - 2.0 mm); neutral (pH 7.0); abrupt smooth boundary.
A2--4 to 12 inches; brown (10YR 5/3) ashy loamy sand, dark brown (10YR 3/3) moist; weak fine subangular blocky structure; slightly hard, friable, nonsticky and nonplastic; common very fine roots; many very fine irregular pores; 10 percent gravel; 40 percent pumice (0.5 - 2.0 mm); neutral (pH 7.0); clear smooth boundary. (Combined thickness of the A horizon is 10 to 15 inches)
C--12 to 24 inches; brown (10YR 5/3) ashy loamy sand, brown (10YR 4/3) moist; massive; slightly hard, friable, nonsticky and nonplastic; common very fine roots; common very fine irregular pores; 10 percent gravel; 40 percent pumice (0.5 - 2.0 mm); neutral (pH 7.2); gradual wavy boundary. (8 to 25 inches thick)
2Bqb--24 to 40 inches; pale brown (10YR 6/3) gravelly loamy fine sand, dark grayish brown (10YR 4/2) moist; massive; hard, firm and brittle, nonsticky and nonplastic; few roots; few very fine irregular pores; 20 percent gravel; slightly alkaline (pH 7.6); abrupt wavy boundary. (12 to 20 inches thick)
2Bkqb--40 to 50 inches; pale brown (10YR 6/3) extremely gravelly sand, dark grayish brown (10YR 4/2) moist; massive; very hard, very firm and brittle, nonsticky and nonplastic; few roots; few very fine irregular pores; 65 percent gravel; carbonates occur as thin slightly effervescent capping at 40 inches and as coatings on the undersides of gravel; slightly alkaline (pH 7.6); abrupt wavy boundary. (7 to 12 inches thick)
2Bkb--50 to 60 inches; pale brown (10YR 6/3) extremely gravelly sand, dark grayish brown (10YR 4/2) moist; single grain; loose, nonsticky and nonplastic; many fine irregular pores; 80 percent gravel; slightly effervescent; slightly alkaline (pH 7.8).
TYPE LOCATION: Deschutes County, Oregon; 1300 feet south and 1200 feet east of the northwest corner of northwest quarter of section 8, T.18 S., R.14 E. (Latitude 44 degrees, 1 minute, 59 seconds N, Longitude 121 degrees, 4 minutes, 57 seconds W)
RANGE IN CHARACTERISTICS: Depth to bedrock is 40 to over 60 inches. Depth to the hard brittle layer is 20 to 40 inches. Depth to carbonates and the extremely gravelly layer is 35 to 50 inches. The soils are usually dry and are dry in all parts of the soil moisture control section for 120 to 150 days (cumulative). The mean annual soil temperature is 48 to 52 degrees F. The upper part of the particle-size control section contains an average of 30 to 50 percent volcanic glass and glass-coated aggregates. Phosphate retention is 15 to 25 percent in the upper part of the profile (A and C horizons).
The A horizon has a value of 4 or 5 dry and chroma of 2 or 3 moist or dry. Pumice content (0.5 - 2.0 mm) ranges from 40 to 70 percent. It is neutral throughout.
The C horizon has a value of 5 or 6 dry, 4 moist and chroma of 2 or 3 moist or dry. Pumice content (0.5 - 2.0 mm) ranges from 20 to 50 percent. It contains 0 to 10 percent basalt gravel and 0 to 10 percent cobbles. Total rock fragment content is 0 to 15 percent. It is neutral or slightly alkaline.
The 2Bq horizon has value of 5 or 6 dry, 4 moist and chroma of 2 or 3 moist or dry. It is hard and brittle throughout. It is gravelly loamy fine sand or loamy sand. Gravel content is 15 to 25 percent. It is slightly alkaline.
The 2Bkq horizon has value of 5 or 6 dry, 4 moist and chroma of 2 or 3 moist or dry. It is extremely gravelly sand or loamy sand. Gravel content is 65 to 85 percent. It is very hard and brittle throughout. Carbonates are present as a thin layer or as coatings on the undersides of gravel. It is slightly alkaline.
The 2Bk horizon has value of 5 or 6 dry, 4 moist and chroma of 2 or 3 moist or dry. It is extremely gravelly sand or loamy sand. Gravel content is 65 to 90 percent. Carbonates are present as coatings on the undersides of gravel. In some pedons, this layer may be absent. It is slightly alkaline.
COMPETING SERIES: These are the Tubspring and Supplee series. Tubspring and Supplee soils have a cambic horizon and lack the hard brittle layer.
GEOGRAPHIC SETTING: Clovkamp soils are on old stream terraces on lava plains. These soils formed in volcanic ash overlying gravelly alluvium. The climate is characterized by cool, moist winters and hot, dry summers. Slopes are 0 to 25 percent. Elevations range from 3000 to 4000 feet. The mean annual precipitation is 8 to 12 inches. The mean annual temperature is 47 to 52 degrees F. The frost free period is 70 to 100 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Deskamp and Gosney soils. Deskamp soils are moderately deep to bedrock. The Gosney soils are shallow to bedrock. Deskamp and Gosney soils lack the sandy or sandy-skeletal material.
DRAINAGE AND PERMEABILITY: Somewhat excessively drained; permeability is rapid over moderate.
USE AND VEGETATION: These soils are used for irrigated cropland and grazing. Potential native vegetation is western juniper, mountain big sagebrush, antelope bitterbrush, Idaho fescue, needle and thread.
DISTRIBUTION AND EXTENT: Deschutes Basin of Central Oregon; MLRA 10. The series is not extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Deschutes County (Upper Deschutes River Area), Oregon, 1992.
REMARKS: Diagnostic horizons and features recognized in this pedon:
mollic epipedon - the zone from the surface to a depth of 12 inches (A1 and A2 horizons).
Vitritorrandic subgroup - the profile to a depth of 24 inches contains over 30 percent glass in the 0.02 to 2.0 mm fraction.
Based on laboratory data from the associated Deskamp soil, the P-retention is less than 25 percent and oxalate aluminum plus one-half the oxalate iron is greater than 0.40 percent.
Ashy over sandy or sandy-skeletal family - based on over 30 percent glass in the upper part of the control section (10 to 24 inches) and sandy or sandy-skeletal material in the lower part of the control section (24 to 40 inches).