LOCATION KYDAKA WA
Established Series
Rev. NRM/LJH/RJE
02/2011
KYDAKA SERIES
The Kydaka series consists of moderately deep to densic material, poorly drained soils that formed in glacial lacustrine sediments over glacial outwash. The soils are on glacial outwash terraces and have slopes of 0 to 5 percent. The mean annual precipitation is about 85 inches and the mean annual temperature is about 48 degrees F.
TAXONOMIC CLASS: Fine-loamy, isotic, acid, isomesic Typic Humaquepts
TYPICAL PEDON: Kydaka mucky silty clay loam, forested. (Colors are for moist soil unless otherwise noted. All textures are apparent field textures.)
Oi--0 to 1 inch; slightly decomposed needles, leaves and twigs.
Oa--1 to 3 inches; highly decomposed needles, leaves, and twigs.
A1--3 to 8 inches; very dark brown (10YR 2/2) mucky silty clay loam, grayish brown (10YR 5/2) dry; weak fine and medium angular blocky structure; hard, friable, moderately sticky and very plastic; many very fine, fine and medium roots; many very fine tubular pores; very strongly acid (pH 4.6); clear smooth boundary. (5 to 9 inches thick)
A2--8 to 14 inches; very dark grayish brown (10YR 3/2) mucky silty clay loam, grayish brown (10YR 5/2) dry; few fine distinct yellowish brown (10YR 5/4) redox concentrations, light yellowish brown (10YR 6/4) dry; weak fine and medium angular blocky structure; hard, friable, moderately sticky and very plastic; many very fine, fine and medium roots; common very fine and fine tubular pores; 5 percent gravel; very strongly acid (pH 4.6) abrupt smooth boundary. (5 to 15 inches thick)
2Bg1--14 to 24 inches thick; dark grayish brown (2.5Y 4/2) gravelly clay loam, light brownish gray (2.5Y 6/2) dry; common medium prominent dark yellowish brown (10YR 4/6) redox concentrations, yellowish brown (10YR 5/6) dry; weak fine subangular blocky structure; hard, firm, moderately sticky and moderately plastic and weakly smeary; few very fine and fine tubular pores; 20 percent gravel; very strongly acid (pH 5.0); clear smooth boundary. (0 to 13 inches thick)
2Bg2--24 to 33 inches; olive gray (5Y 4/2) gravelly loam, gray (5Y 6/1) dry; common medium prominent dark yellowish brown (10YR 4/6) redox concentrations, yellowish brown (10YR 5/6) dry; massive; hard, very firm, moderately sticky and moderately plastic; very few very fine roots; few very fine tubular pores; 30 percent gravel; very strongly acid (pH 5.0); clear smooth boundary. (0 to 9 inches thick)
2Cd--33 to 63 inches; dark gray (5Y 4/1) dense glacial till that crushes to gravelly clay loam, gray (5Y 6/1) dry; common medium prominent dark yellowish brown (10YR 4/6) redox concentrations, yellowish brown (10YR 5/6) dry; massive; hard, very firm, moderately sticky and moderately plastic; very few very fine roots; few very fine tubular pores; 30 percent gravel; very strongly acid (pH 4.8).
TYPE LOCATION: Clallam County, Washington; 100 feet south and 2,600 feet west of the northeast corner of sec. 28, T.29N., R.15W.
RANGE IN CHARACTERISTICS: Depth to dense glacial till is 20 to 40 inches. The umbric epipedon is 10 to 20 inches thick. The particle-size control section averages 10 to 30 percent rock fragments and are dominantly gravel. The mean annual soil temperature 47 to 52 degrees F. The difference between the mean winter and mean summer soil temperature is 5 to 7 degrees F.
The A horizon has value of 2 or 3 moist and 4 or 5 dry. It has angular blocky or subangular blocky structure. It is mucky silt loam or mucky silty clay loam with 10 to 20 percent organic matter and 18 to 30 percent field estimated clay.
The 2Bg1 horizon has hue of 2.5Y or 5Y and value of 6 or 7 dry. Some pedons have chroma of 4. It is clay loam, gravelly clay loam, or gravelly silty clay loam. This horizon has angular blocky or subangular blocky structure.
The 2Bg2 horizon has hue of 2.5Y or 5Y, value of 4 through 7 moist, 6 through 8 dry and chroma of 1 or 2 in most pedons but some pedons have chroma of 3 or 4. It is gravelly loam, gravelly clay loam, or gravelly silty clay loam.
The 2Cd horizon gravelly loam, gravelly clay loam or gravelly silty clay loam. It has a moist bulk density of 1.70 to 2.00 g/cc.
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: Kydaka soils are on glacial outwash terraces at elevations of 10 to 660 feet. They formed in silty glacial lacustrine sediments over glacial outwash or till. These soils are in a mild marine climate and have cool, moist summers and cool, wet winters. Mean annual precipitation is 75 to 120 inches with coastal fog influence from the Pacific Ocean. Average January temperature is about 39 degrees F., average July temperature is about 60 degrees F., and the mean annual temperature is 47 to 50 degrees F. The frost-free season is 180 to 220 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Ozette,
Palix,
Zeeka and
Snahopish soils. Ozette soils are moderately well drained, have an umbric epipedon, and have a densic contact bgetween 40 and 60 inches. Palix soils are well drained and have a paralithic contact between 40 and 60 inches. Snahopish soils are well drained, and formed in sandstone residuum and colluvium on mountainsides. Zeeka soils have aquic conditions below 12 inches.
DRAINAGE AND PERMEABILITY: Poorly drained; very slow runoff; permeability is moderately slow above the compact glacial till and very slow within the compact till.
USE AND VEGETATION: Timber production is the principal use. Native vegetation is predominantly western redcedar with some western hemlock and lodgepole pine. Understory species include salal, deer fern, red huckleberry and twinflower.
DISTRIBUTION AND EXTENT: Western Washington MLRA 4A. Series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Clallam County, Washington, 1979.
REMARKS: Diagnostic horizons and other features:
Umbric epipedon - 3 to 14 inches
Cambic horizon - 14 to 33 inches
Densic contact - 33 inches
All depths to diagnostic horizons and other features are measured from the top of the first mineral horizon.
National Cooperative Soil Survey
U.S.A.