LOCATION PILLERY WAEstablished Series
TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, nonacid, mesic Typic Udifluvents
TYPICAL PEDON: Pillery fine sandy loam - forested on a 2 percent northeast facing slope at 940 feet elevation. (Colors are for moist soil unless otherwise noted.)
Oi--1 inch to 0; leaves, needles, and twigs.
A1--0 to 9 inches; very dark grayish brown (10YR 3/2) fine sandy loam, pale brown (10YR 6/3) dry; weak fine granular structure; soft, very friable, slightly sticky and nonplastic; many very fine and fine, few medium roots; many very fine and fine irregular pores; 5 percent pebbles and 5 percent concretions; moderately acid (pH 6.0); clear wavy boundary. (7 to 10 inches thick)
A2--9 to 20 inches; very dark grayish brown (10YR 3/2) loam, pale brown (10YR 6/3) dry; weak fine and medium subangular blocky structure; slightly hard, friable, slightly sticky and nonplastic; common very fine and few fine and medium roots; common fine irregular and few fine vesicular pores; 10 percent pebbles; fine strata of fine sandy loam; moderately acid (pH 5.6); clear smooth boundary. (10 to 12 inches thick)
A3--20 to 32 inches; dark brown (10YR 3/3) fine sandy loam, pale brown (10YR 6/3) dry; weak medium subangular blocky structure; slightly hard, friable, slightly sticky and nonplastic; few fine and common medium roots; common fine irregular and common fine vesicular pores; 5 percent pebbles; fine strata of loam; strongly acid (pH 5.4); clear wavy boundary. (10 to 14 inches thick)
C1--32 to 45 inches; brown (10YR 4/3) fine sandy loam, pale brown (10YR 6/3) dry; massive; slightly hard, friable, slightly sticky and nonplastic; common very fine and medium roots; common fine irregular and common fine vesicular pores; 10 percent pebbles; fine strata of loamy fine sand strongly acid (pH 5.4); clear wavy boundary. (12 to 14 inches thick)
2C2--45 to 60 inches; brown (10YR 5/3) very gravelly loamy sand, very pale brown (10YR 7/3) dry; single grain; loose; few medium and coarse roots; many very fine, fine, and medium irregular pores; 40 percent pebbles and 10 percent cobbles; moderately acid (pH 6.0).
TYPE LOCATION: Southern Skamania County, Washington; about 1/2 mile north of Stabler, 2,000 feet south and 1,000 feet east of the northwest corner of sec. 23, T. 4 N., R. 7 E.
RANGE IN CHARACTERISTICS: Mean annual soil temperature is 47 to 49 degrees F. The particle-size control section is stratified fine sandy loam, loam, silt loam, and loamy fine sand and has 5 to 15 percent clay and 15 to 40 percent fine sand and coarser. Base saturation (by sum) is assumed to be 40 to 65 percent.
The upper part of the A horizon has hue of 7.5YR or 10YR, and value of 6 or 7 dry. It is stratified with lenses of loam, very fine sandy loam, fine sandy loam, and silt loam.
The lower part of the A horizon has hue of 7.5YR or 10YR, and value of 3 or 4 moist. Reaction is strongly acid or moderately acid. It has 5 to 15 percent rock fragments.
The C horizon has hue of 10YR or 7.5YR, value of 4 or 5 moist, and chroma of 3 to 5. It is stratified loamy fine sand to fine sandy loam.
The 2C horizon is gravelly or very gravelly loamy sand or sand. It has 25 to 40 percent pebbles and 0 to 10 percent cobbles.
COMPETING SERIES: This is the Colvard, Floris, and Kickapoo series.
GEOGRAPHIC SETTING: Pillery soils are on flood plains and low terraces at elevations of 900 to 1,200 feet. These soils formed in alluvium derived dominantly from basic igneous rock. Slopes are 0 to 3 percent. The climate is characterized by warm, dry summers and cool, wet winters.
Average annual precipitation is 90 to 110 inches. The mean January temperature is about 30 degrees F, mean July temperature is about 62 degrees F, and the mean annual temperature is 45 to 47 degrees F. The frost-free season is 110 to 130 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the St. Martin and Stabler soils. St. Martin soils are in a fine family. Stabler soils are medial.
DRAINAGE AND PERMEABILITY: Moderately well drained; slow runoff; moderately rapid permeability. A seasonal high water table occurs is as high as 3 to 4 feet from March to May. Occasional brief periods of flooding occur from March to May.
USE AND VEGETATION: Used for timber production, pastureland, and wildlife habitat. The native vegetation is Douglas-fir, red alder, western hemlock, and black cottonwood. Understory species include vine maple, salal, Oregon-grape, trailing blackberry, and western swordfern.
DISTRIBUTION AND EXTENT: Southern Skamania County, Washington. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Skamania County, Washington, 1987.
REMARKS: There are no diagnostic horizons in this soil. The particle-size control section, l0 to 40 inches, is assumed to have an irregular decrease in organic carbon.
Classification changed 7/98 based on 1998 Keys to Soil Taxonomy.