LOCATION NANICH WAEstablished Series
TAXONOMIC CLASS: Medial-skeletal over sandy or sandy-skeletal, ferrihydritic over mixed, isomesic Typic Hapludands
TYPICAL PEDON: Nanich extremely gravelly medial sandy loam-forestland, on a 1 percent slope at an elevation of 900 feet in a western hemlock/swordfern-oxalis plant association. (When described on July 18, 1994, the soil was dry throughout. Colors are for moist soil unless otherwise
stated.)
Oi--0 to 1 inch; slightly decomposed needles, leaves, twigs, and cone fragments; abrupt smooth boundary. (1 to 3 inches thick)
Oe--1 to 2 inches; moderately decomposed organic materials; abrupt smooth boundary. (0.5 to 1 inch thick)
A--2 to 7 inches; dark brown (7.5YR 3/3) extremely gravelly medial sandy loam, dark yellowish brown (10YR 4/4) dry; weak very fine and fine subangular blocky and weak very fine and fine granular structure; slightly hard, friable, nonsticky and nonplastic; weakly smeary; many very fine, fine, medium, and coarse roots; many very fine and fine irregular pores; 60 percent gravel, 10 percent cobbles; strongly acid (pH 5.4); clear smooth boundary. (3 to 6 inches thick)
Bw1--7 to 13 inches; dark brown (7.5YR 3/4) extremely gravelly medial sandy loam, brown (7.5YR 5/4) dry; weak very fine and fine subangular blocky and weak very fine and fine granular structure; slightly hard, friable, nonsticky and nonplastic; weakly smeary; common very fine, fine, medium, and coarse roots; common very fine and fine irregular pores; 55 percent gravel, 15 percent cobbles; moderately acid (pH 5.6); clear wavy boundary.
Bw2--13 to 18 inches; dark yellowish brown (10YR 3/6) extremely gravelly medial sandy loam, brownish yellow (10YR 6/6) dry; weak very fine subangular blocky and weak very fine and fine granular structure; slightly hard, friable, nonsticky and nonplastic; weakly smeary; common very fine and fine and few medium and coarse roots; common very fine and fine irregular pores; 50 percent gravel, 20 percent cobbles; moderately acid (pH 5.6); abrupt wavy boundary. (Combined thickness of the Bw horizon is 11 to 14 inches.)
2C1--18 to 25 inches; dark yellowish brown (10YR 3/6) extremely cobbly sand, brownish yellow (10YR 6/6) dry; massive; soft, very friable, nonsticky and nonplastic; few very fine and fine roots; 35 percent gravel, 40 percent cobbles; moderately acid (pH 5.8); clear wavy boundary.
2C2--25 to 62 inches; dark yellowish brown (10YR 3/6) extremely cobbly sand, brownish yellow (10YR 6/6) dry; single grain; loose, nonsticky and nonplastic; 30 percent gravel, 50 percent cobbles; moderately acid (pH 6.0).
TYPE LOCATION: Clallam County, Washington, about 5 1/3 miles southeast of Deadmans Hill, about 2,110 feet east and 1,760 feet north of the southwest corner of Section 32, T. 30 N., R. 11 W. (Latitude 48 degrees, 03 minutes, 03 seconds N., Longitude 124 degrees, 08 minutes, 44 seconds W.)
RANGE IN CHARACTERISTICS: Mean annual soil temperature is 47 to 51 degrees F. The difference between the mean summer and mean winter soil temperature is 5 to 9 degrees F. These soils are usually moist, and are dry 30 to 45 consecutive days in the soil moisture control section; udic moisture regime. Depth to the sandy-skeletal substratum is 14 to 20 inches. The particle-size control section has andic soil properties with a cumulative thickness of 14 to 20 inches and 50 to 90 percent rock fragments by volume. The andic soil material has an estimated moist bulk density of 0.70 to 0.90 g/cc, acid-oxalate extractable aluminum plus one half of the acid-oxalate extractable iron of 2 to 3 percent, phosphate retention of 85 to 100 percent, 15-bar water retention of 12 to 25 percent for air dried samples, and acid oxalate extractable iron is 1.5 to 3.0 percent. The lower part (thickest part) of the particle size control section lacks andic soil properties.
The A horizon has hue of 7.5YR or 10YR moist and dry and value of 4 or 5 dry. Reaction is very strongly or strongly acid. It has 2 to 5 cmol/kg of aluminum. It has 5 to 15 percent organic matter.
The Bw horizon has hue of 10YR or 7.5YR moist and dry, value of 3 or 4 moist and 5 through 7 dry, and chroma of 4 or 6 moist and dry. It is extremely gravelly medial sandy loam, extremely cobbly medial sandy loam, or very gravelly medial sandy loam. Reaction is strongly or moderately acid. It has 1 to 2 cmol/kg of aluminum. It has 2 to 7 percent organic matter.
The 2C horizon has hue of 10YR or 2.5Y moist and dry, value of 5 or 6 dry, and chroma of 3, 4, or 6 moist and 4 or 6 dry. It is extremely cobbly sand, extremely gravelly sand, or extremely gravelly loamy sand. Reaction is moderately or slightly acid.
COMPETING SERIES: There are no competing series. The geographically associated Solduc series is similar.
GEOGRAPHIC SETTING: Nanich soils are on glacial outwash plains or terraces. Slopes are 1 to 5 percent. The soils formed in continental glacial outwash. Elevations are 400 to 900 feet. Average annual precipitation is 90 to 125 inches. Average annual temperature is 45 to 49 degrees F. The frost-free season is 140 to 160 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Harken and Solduc soils. Harken soils are on glacial outwash terraces and have less than 35 percent rock fragments throughout the contrasting particle-size control section. Solduc soils are on glacial outwash terraces and have andic soil properties 20 to 40 inches thick in the particle-size control section.
DRAINAGE AND PERMEABILITY: Somewhat excessively drained; moderate over rapid permeability.
USE AND VEGETATION: Timber production, wildlife habitat, recreation, and watershed. Native vegetation is western hemlock, Douglas-fir, western redcedar, Sitka spruce, western swordfern, Oregon oxalis, false lily-of-the-valley, northern twinflower, mosses, red huckleberry, deer fern, and threeleaf foamflower.
DISTRIBUTION AND EXTENT: Clallam County, Washington; MLRA 1. Series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Clallam County, Washington, 2000; Olympic National Forest.
REMARKS: Diagnostic horizons and features recognized in this pedon are the following:
Ochric epipedon
Cambic horizon - 7 to 18 inches
Andic soil properties - 2 to 18 inches
PSCS - 2 to 42 inches with 2 to 18 inches being medial-skeletal and ferrihydritic and 18 to 42 inches being sandy-skeletal and isotic. The thickest part is sandy-skeletal.
All depths to diagnostic horizons and other features are measured from the top of the first mineral horizon.