LOCATION ACANOD OR
Established Series
Rev. RWL/AON/TDT
06/2011
ACANOD SERIES
The Acanod series consists of very deep, moderately well drained soils formed in colluvium weathered from basic igneous rock. They are in basins or depressions on uplands. Slopes are 2 to 25 percent. The mean annual precipitation is 90 inches, and the mean annual temperature is 49 degrees F.
TAXONOMIC CLASS: Fine, isotic, mesic Oxyaquic Humudepts
TYPICAL PEDON: Acanod silt loam, forested. (Colors are for moist soil unless otherwise noted.)
Oi--0 to 2 inches; slightly decomposed layer of needles, leaves and twigs.
A--2 to 11 inches; very dark grayish brown (10YR 3/2) silt loam, brown (10YR 5/3) dry; strong fine granular structure; soft, very friable, slightly sticky and slightly plastic; many very fine roots; many fine and very fine irregular pores; very strongly acid (pH 4.8); clear wavy boundary. (6 to 10 inches thick)
AB--11 to 16 inches; very dark grayish brown (10YR 3/2) silty clay loam, brown (10YR 5/3) dry; moderate fine and very fine granular and subangular blocky structure; slightly hard, firm, moderately sticky and moderately plastic; many roots; many very fine irregular pores; 5 percent stones; very strongly acid (pH 4.8); clear wavy boundary. (4 to 10 inches thick)
Bw1--16 to 23 inches; dark brown (10YR 3/3) silty clay loam, brown (10YR 5/3) dry; moderate fine and medium subangular blocky structure; hard, firm, moderately sticky and moderately plastic; many roots; many very fine and fine tubular pores; 10 percent stones and boulders; very strongly acid (pH 4.6); clear wavy boundary. (8 to 14 inches thick)
Bw2--23 to 36 inches; dark yellowish brown (10YR 3/4) silty clay, yellowish brown (10YR 5/4) dry; moderate medium subangular blocky structure; very hard, firm, moderately sticky and moderately plastic; common roots; common fine and very fine tubular pores; common thin dark brown (10YR 3/3) coatings on faces of peds; 15 percent stones and boulders; very strongly acid (pH 4.6). (8 to 15 inches thick)
BC--36 to 54 inches; yellowish brown (10YR 5/4) silty clay, light yellowish brown (10YR 6/4) dry; common fine distinct very dark grayish brown (10YR 3/2) and yellowish brown (10YR 5/8) redox features; moderate medium subangular blocky structure; very hard, very firm, very sticky and moderately plastic; few roots; common very fine tubular pores; 10 percent stones and boulders; very strongly acid (pH 4.6); clear wavy boundary. (15 to 22 inches thick)
C--54 to 70 inches; light yellowish brown (10YR 6/4) stony silty clay, very pale brown (10YR 7/4) dry; many distinct weak red (2.5YR 5/2) and reddish brown (5YR 4/4) and yellowish brown (10YR 5/8) redox features; massive; very hard, very firm, very sticky and very plastic; 20 percent stones and boulders; very strongly acid (pH 4.6).
TYPE LOCATION: Linn County, Oregon; 31/2 miles northeast of Snow Peak; SW1/4 SE1/4 section 14, T. 11 S., R. 2 E.
RANGE IN CHARACTERISTICS: The mean annual soil temperature is 52 to 54 degrees F. The soils are usually moist and are dry for less than 45 consecutive days between depths of 4 and 12 inches during the summer months. The solum is 40 to 60 inches or more thick. The umbric epipedon is 20 to 30 inches thick. Rock fragments, dominantly stone and boulder size, range from 0 to 15 percent in the solum.
The A and AB horizon has value of 2 or 3 moist and 4 or 5 dry, and chroma of 2 or 3 moist and dry.
The Bw horizon has value of 3 or 4 moist and 5 or 6 dry, and chroma of 3 or 4 moist and dry. In some pedons the lower part has chroma of 2. It is clay loam, silty clay loam, silty clay or clay and averages 35 to 45 percent clay. Redox features with chroma of 2 through 8 range from few to common in the lower part of B horizon. A few high chroma redox concentrations are in the upper part of the Bw horizon in some pedons.
The C horizon if present is stony silty clay loam, stony silty clay, or stony clay loam. Rock fragments range from 15 to 35 percent. These are mostly stone size but some pedons have up to 15 percent cobbles.
COMPETING SERIES: This is the
Ead series. Ead soils have a paralithic contact at a depth of 20 to 40 inches.
GEOGRAPHIC SETTING: These soils are in basin positions in the Cascade Range at elevations from 1,500 to 2,700 feet. Slopes range from 2 to 25 percent. These soils formed in colluvium weathered from coarse grained igneous rock. The soils have a humid temperate climate with a mean annual precipitation of 80 to 100 inches. The mean January temperature is 38 degrees F.; and mean July temperature is about 62 degrees F. The mean annual temperature is 46 to 51 degrees F. The frost-free season is 140 to 190 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Kinney and McCully soils. Kinney soils are dominated by amorphus material and are well drained. McCully soils have an umbric epipedon less than 20 inches thick, and are well drained.
DRAINAGE AND PERMEABILITY: Moderately well drained; medium runoff; slow permeability. A perched water table is at 1.5 to 3.0 feet from November to March.
USE AND VEGETATION: These soils are used for timber production, water supply, recreation and wildlife habitat. The native vegetation is dominantly Douglas-fir, western hemlock, western redcedar, and red alder. The understory is vine maple, western swordfern, Oregon oxalis and small amounts of other shrubs and herbs.
DISTRIBUTION AND EXTENT: Western slopes of the Cascade Range in Oregon. This series is inextensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Linn County, Oregon, 1983.
REMARKS: Diagnostic horizons and other features:
Umbric epipedon - 2 to 23 inches
Cambic horizon - 23 to 70 inches
All depths to diagnostic horizons and other features are measured from the to of the first mineral horizon.
National Cooperative Soil Survey
U.S.A.