LOCATION BUCKLEY WA
Established Series
Rev. DES/KMS
05/2017
BUCKLEY SERIES
Landscape--glacial drift plains
Landform--lahars
Slope--0 to 4 percent
Parent material--Osceola volcanic mudflow
Mean annual precipitation--about 1220 mm
Mean annual air temperature--about 10 degrees C
Depth class--moderately deep to dense lahar
Drainage class--poorly drained
Soil moisture regime--xeric
Soil temperature regime--mesic
Soil moisture subclass--typic
TAXONOMIC CLASS: Fine-loamy, isotic, nonacid, mesic Typic Humaquepts
TYPICAL PEDON: Buckley gravelly silt loam, pasture
Ap--0 to 25 cm; gravelly silt loam, very dark brown (10YR 2/2) dry, black (10YR 2/1) moist; weak fine granular structure; slightly hard, very friable, slightly sticky and slightly plastic; 15 percent gravel; moderately acid (pH 5.8); abrupt smooth boundary
A--25 to 41 cm; gravelly loam, grayish brown (10YR 5/2) dry, very dark grayish brown (10YR 3/2) moist; few fine prominent strong brown (7.5YR 5/6) redoximorphic concentrations; weak medium granular structure; slightly hard, friable, slightly sticky and slightly plastic; 20 percent gravel; slightly acid (pH 6.2); clear broken boundary
Bg--41 to 97 cm; gravelly sandy clay loam, pale yellow (2.5Y 8/2) dry, grayish brown (2.5Y 5/2) moist; many medium and coarse prominent brown (7.5YR 5/4) and strong brown (7.5YR 5/6) redoximorphic concentrations; massive; hard, very firm, slightly sticky and slightly plastic; 20 percent gravel; slightly acid (pH 6.4); abrupt wavy boundary
Cd--97 to 150 cm; dense lahar that breaks to gravelly sandy clay loam, pale yellow (2.5Y 8/2) dry, grayish brown (2.5Y 5/2) moist; few medium and coarse prominent brown (7.5YR 5/4) and strong brown (7.5YR 5/6) redoximorphic concentrations; massive, very hard, very firm, slightly sticky and slightly plastic; 20 percent gravel; slightly acid (pH 6.4)
TYPE LOCATION: King County, Washington, about 470 m west and 90 m south of the E1/4 corner of section 20, T. 20 N., R. 6 E.; latitude 47.2056, longitude -122.0656, datum WGS 84 (coordinates estimated from PLSS details)
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--8 to 11 degrees C
Particle-size control section--averages more than 15 percent fine and coarser sand and 18 to 35 percent clay
Depth to dense lahar--50 to 100 cm
Water table--perched above lahar deposit in November through June; at surface to a depth of 50 cm
Ap horizon
Value--2 to 4 dry
Chroma--1 or 2 moist
Fine-earth texture--loam, silt loam
Gravel content--5 to 25 percent
Reaction--5.1 to 6.5
Thickness--25 to 36 cm
A horizon
Chroma--1 or 2 moist
Gravel content--15 to 35 percent
Reaction--5.1 to 6.5
Thickness--0 to 20 cm
Bg horizon
Hue--10YR, 2.5Y, 5Y
Value--6 to 8 dry, 4 to 5 moist
Chroma--2 or 3 moist
Fine-earth texture--sandy loam, loam, sandy clay loam, sandy clay
Gravel content--15 to 35 percent
Cobble content--0 to 5 percent
Total rock fragment content--15 to 35 percent
Reaction--5.6 to 6.5
Thickness--30 to 61 cm
Cd horizon
Hue--10YR, 2.5Y
Value--7 or 8 dry
Gravel content--15 to 35 percent
Cobble content--0 to 5 percent
Total rock fragment content--15 to 35 percent
Reaction--5.6 to 6.5
COMPETING SERIES: None
GEOGRAPHIC SETTING:
Elevation--120 to 250 m
Climate--mild, humid
Mean January air temperature--3 degrees C
Mean July air temperature--18 degrees C
Mean annual air temperature--about 10 degrees C
Frost-free season--190 to 205 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Alderwood--xeric moisture regime; densic horizon
Seattle,
Tukwila--organic
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--poorly drained
Saturated hydraulic conductivity (Ksat)--moderately low
USE AND VEGETATION:
Use--cleared and drained for seeded grass pasture, hay, and small grain
Native vegetation--western redcedar, western hemlock, Sitka spruce, Douglas-fir, red alder, bigleaf maple, vine maple, western swordfern, red huckleberry, Oregon oxalis, bedstraw, trailing blackberry, wild ginger
DISTRIBUTION AND EXTENT: About 17,000 acres in western Washington; MLRA 2; moderate extent
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Eastern Puget Sound Basin, Washington; 1909
REMARKS:
Diagnostic horizons and other features in this pedon
*Umbric epipedon--zone from mineral soil surface to a depth of 41 cm
*Particle-size control section--zone from 25 to 97 cm
*Episaturation--zone from 31 to 97 cm
12/2015--This official series description was updated according to SSR01 Technical Note--Content and Format of Official Series Descriptions (revised 12/2015). Most of the changes were in formatting; no major technical changes were made.
National Cooperative Soil Survey
U.S.A.