LOCATION SCATTER WA
Established Series
IRD. DRU/EED
07/2017
SCATTER SERIES
Landscape--river valleys
Landform--natural levees, alluvial terraces, flood plains
Slope--0 to 15 percent
Parent material--alluvium
Mean annual precipitation--about 1500 mm
Mean annual air temperature--about 11 degrees C
Depth class--very deep
Drainage class--well drained
Soil moisture regime--xeric
Soil temperature regime--mesic
Soil moisture subclass--typic
TAXONOMIC CLASS: Coarse-loamy, isotic, mesic Andic Haploxerolls
TYPICAL PEDON: Scatter loam in an area of hayland (When described on July 26, 2016, the soil was dry throughout.)
Ap1--0 to 10 cm; loam, very dark brown (10YR 2/2) moist, dark yellowish brown (10YR 3/4) dry; strong fine granular structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine roots; common very fine and fine tubular pores; moderately acid (pH 5.8); abrupt smooth boundary
Ap2--10 to 33 cm; loam, dark brown (10YR 3/3) moist, dark yellowish brown (10YR 3/4) dry, moderate fine subangular blocky structure; moderately hard, firm, slightly sticky and slightly plastic; common very fine roots; common very fine and few medium tubular pores; moderately acid (pH 5.9); gradual wavy boundary
Bw1--33 to 70 cm; loam, dark yellowish brown (10YR 3/4) moist, dark yellowish brown (10YR 4/4) dry; moderate medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; few very fine roots; common very fine and few medium tubular pores and few medium irregular pores; moderately acid (pH 6.0); gradual wavy boundary
Bw2--70 to 125 cm; fine sandy loam, dark yellowish brown (10YR 3/4) moist, dark yellowish brown (10YR 4/4) dry; weak fine subangular blocky structure; soft, friable, nonsticky and nonplastic; few very fine roots; few very fine and fine tubular pores; slightly acid (pH 6.3); gradual wavy boundary
C--125 to 150 cm; loamy fine sand, dark yellowish brown (10YR 3/4) moist, dark yellowish brown (10YR 4/4) dry; massive; soft, very friable, nonsticky and nonplastic; few very fine and fine tubular pores; slightly acid (pH 6.5)
TYPE LOCATION: Thurston County, Washington, about 2 km southwest of Grand Mound and about 270 m north of Prather Road; about 95 m south and 45 m west of northeast corner of section 22, T. 15 N., R. 3 W., Willamette Meridian; Rochester, Washington, U.S. Geological Survey quadrangle; latitude 46.7780920 degrees north, longitude 123.0352510 degrees west, WGS 84 (coordinates determined with a GPS)
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--10 to 12 degrees C
Soil moisture control section--dry 60 to 75 days following summer solstice
Mollic epipedon thickness--25 to 50 cm
Ap horizon
Hue--10YR, 7.5YR
Value--2, 2.5, or 3 moist, 3 or 4 dry
Chroma--1 to 3 moist, 3 or 4 dry
Volcanic glass content--5 to 10 percent
1/3-bar bulk density--0.80 to 0.95 g/cm3
Ammonium oxalate extractable Al plus 1/2 Fe--1 to 3 percent
Fine-earth texture--loam, silt loam, fine sandy loam
Clay content--5 to 20 percent
Gravel content--0 to 10 percent
Reaction (pH)--5.1 to 6.5
Combined thickness--25 to 50 cm
Bw1 horizon
Hue--10YR, 7.5YR
Value--3 or 4 moist, 4 to 6 dry
Fine-earth texture--loam, fine sandy loam
Clay content--5 to 18 percent
Gravel content--0 to 10 percent
Reaction (pH)--5.6 to 6.5
Thickness--15 to 50 cm
Bw2 horizon
Hue--10YR, 7.5YR
Value--3 or 4 moist, 4 to 6 dry
Chroma--4 to 6 dry
Fine-earth texture--loam, fine sandy loam, loamy fine sand
Clay content--0 to 18 percent
Gravel content--0 to 10 percent
Reaction (pH)--5.6 to 6.5
Thickness--30 to 60 cm
Bw3 horizon (where present)
Hue--10YR, 7.5YR
Value--3 or 4 moist, 4 to 6 dry
Chroma--4 to 6 dry
Fine-earth texture--loam, fine sandy loam, loamy sand
Clay content--0 to 18 percent
Gravel content--0 to 20 percent
Reaction (pH)--5.6 to 6.5
C horizon (where present)
Hue--10YR
Value--3 or 4 moist, 3 to 5 dry
Chroma--3 or 4 moist, 3 to 6 dry
Fine-earth texture--loamy fine sand, loamy sand, fine sandy loam
Clay content--0 to 15 percent
Rock fragment content--0 to 30 percent
Reaction (pH)--5.6 to 7.3
COMPETING SERIES: None
GEOGRAPHIC SETTING:
Elevation--5 to 55 m
Mean annual precipitation--1200 to 1800 mm
Mean annual air temperature--10 to 11 degrees C
Frost-free period--150 to 200 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Chehalis--less than 15 percent sand and 18 to 35 percent clay in particle-size control section; in linear to slightly convex positions of flood plains
Eld--18 to 35 percent clay in particle-size control section; in slightly convex to linear positions of flood plains
Elma--base saturation of less than 50 percent in lower part of particle-size control section; in similar landform positions
Fordprairie,
Maytown--aquic conditions at a depth of 50 to 75 cm from the soil surface; in concave to linear positions of flood plains
Rennie--aquic conditions to the soil surface; frequently flooded; frequently ponded; in oxbows and backswamps
Roundtree--aquic conditions to the soil surface; frequently flooded; frequently ponded; in concave depressions and overflow stream channels
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Flooding--very rare to occasional, brief periods in November through March
Saturated hydraulic conductivity (Ksat)--moderately high or high in A and Bw horizons, very high in C horizon
USE AND VEGETATION:
Use--hayland, livestock grazing, or crop production in cleared areas, wildlife habitat
Native vegetation--Douglas-fir, bigleaf maple, black cottonwood, red alder, western redcedar, common snowberry, red elderberry, beaked hazelnut, salmonberry, vine maple, Indian plum, Cascade Oregon grape, trailing blackberry, western swordfern, brackenfern
DISTRIBUTION AND EXTENT: Western Washington; MLRA 2; small extent
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Thurston County, Washington; 2016; name from Scatter Creek
REMARKS:
Diagnostic horizons and other features in this pedon
*Particle-size control section--zone from 25 to 100 cm
*Mollic epipedon--zone from the surface to a depth of 33 cm
*Cambic horizon--zone from 33 to 125 cm
4/2017--The Scatter series was established as part of an update project. The official series description was developed according to SSR01 Technical Note--Content and Format of Official Series Descriptions (revised 12/2015). Further field investigation and laboratory sampling in the flood plains of MLRA 2 is recommended to determine the distribution and influence of volcanic ash.
National Cooperative Soil Survey
U.S.A.