LOCATION EDENCREEK CA
Established Series
JBB/CES/JTW
09/2021
EDENCREEK SERIES
The Edencreek series consists of moderately deep, well drained soils formed in colluvium over residuum weathered from granitic rocks. The Edencreek soils are on mountain slopes of the Sierra Nevada Mountains. Slopes range from 15 to 90 percent. The mean annual precipitation is about 835 mm and the mean annual air temperature is about 13 degrees C.
TAXONOMIC CLASS: Coarse-loamy, isotic, mesic Ultic Haploxeralfs
TYPICAL PEDON: Edencreek sandy loam on a south-facing (164 degree), 45 percent slope under a cover of live oak and manzanita at an elevation of 1317 meters. (Colors are for dry soils unless otherwise noted. When described on March 28, 2014 the soil was moist throughout.)
Oi--0 to 2 cm; very dark brown (7.5YR 2.5/2) slightly decomposed plant material, black (7.5YR 2.5/1) moist; 5 percent subangular strongly cemented granodiorite gravel; strongly acid (pH 5.4); abrupt wavy boundary. (1 to 3 cm thick)
A--2 to 10 cm; brown (7.5YR 4/3) sandy loam, very dark brown (7.5YR 2.5/2) moist; 10 percent clay; weak fine subangular blocky structure; soft, very friable, slightly sticky, nonplastic; many very fine and fine, and common medium roots throughout; many very fine irregular pores; 8 percent subangular strongly cemented granodiorite gravel; NaF pH 8.5; slightly acid (pH 6.2); clear wavy boundary. (3 to 12 cm thick)
Bt1--10 to 28 cm; brown (7.5YR 5/4) sandy loam, brown (7.5YR 4/3) moist; 10 percent clay; moderate medium subangular blocky structure; slightly hard, friable, slightly sticky, nonplastic; common very fine, fine, medium, and coarse roots throughout; common very fine and fine tubular pores; 10 percent faint clay films on all faces of peds; 10 percent subangular strongly cemented granodiorite gravel, 2 percent subangular moderately cemented granodiorite paragravel; NaF pH 8.5; very strongly acid (pH 4.8); clear wavy boundary. (15 to 35 cm thick)
Bt2--28 to 65 cm; strong brown (7.5YR 4/6) gravelly sandy loam, brown (7.5YR 4/4) moist; 14 percent clay; moderate coarse subangular blocky structure; moderately hard, firm, slightly sticky, nonplastic; common medium, coarse, and very coarse roots throughout; common fine and medium tubular pores; 10 percent faint clay films on all faces of peds; 15 percent subangular strongly cemented granodiorite gravel, 10 percent subangular moderately cemented granodiorite paragravel, 2 percent subangular moderately cemented granodiorite paracobbles; NaF pH 8.5; very strongly acid (pH 4.9); gradual wavy boundary. (15 to 35 cm thick)
Cr--65 to 92 cm; reddish yellow (7.5YR 6/6) moderately cemented granodiorite bedrock, brown (7.5YR 4/4) moist; very strongly acid (pH 4.9).
TYPE LOCATION: Tulare County, California, on Mineral King Rd in Sequoia National Park; USGS 7.5 minute topographic quadrangle: Silver City, California; WGS84 36.433807 latitude and-118.739571 longitude; UTM zone 11 4033472 meters N 344073 meters E NAD83.
RANGE IN CHARACTERISTICS:
Soil temperature: The mean annual soil temperature at 50 cm is 11 to 15 degrees C and the difference between mean summer and mean winter soil temperature is greater than 6 degrees C. The soils have a mesic temperature regime.
Soil moisture: The soils have a xeric soil moisture regime. The soil moisture control section is dry in all parts from about June to October (about 150 days).
Diagnostic Feature(s):
Ochric epipedon thickness: 10 to 25 cm
Argillic horizon thickness: 35 to 80 cm
Depth to paralithic contact: 50 to 100 cm
Base saturation: 35 to 75 percent in one or more subhorizons of the upper 75cm of the argillic horizon (by sum of cations).
Particle size control section weighted average:
Rock fragments: 0 to 30 percent, with 0 to 30 percent gravel or channers, and 0 to 5 percent cobbles.
Pararock fragments: 0 to 10 percent paragravel
Clay content: 10 to 18 percent
NaF pH: 8.5 to 9.5
A horizon
Hue: 7.5YR, 10YR
Value: 4 or 5 dry, 2 or 3 moist
Chroma: 2 to 4, dry or moist
Texture: sandy loam, fine sandy loam, very fine sandy loam
Clay content: 6 to 12 percent
Rock fragments: 0 to 15 percent gravel
Reaction: moderately acid to neutral
Bt1 horizon
Hue: 7.5YR, 10YR
Value: 4 to 7 dry, 3 to 5 moist
Chroma: 3 to 6, dry or moist
Texture: sandy loam, fine sandy loam, very fine sandy loam
Clay content: 8 to 15 percent
Rock fragments: 0 to 25 percent
0 to 20 percent gravel or channers
0 to 5 percent cobbles
Pararock fragments: 0 to 10 percent paragravel
Reaction: extremely acid to slightly acid
Bt2 horizon
Hue: 7.5YR, 10YR
Value: 4 to 6 dry, 3 to 5 moist
Chroma: 4 or 6 dry, 3 to 6 moist
Texture: sandy loam, fine sandy loam, very fine sandy loam
Clay content: 12 to 18 percent
Rock fragments: 0 to 35 percent
0 to 35 percent gravel or channers
0 to 5 percent cobbles
Pararock fragments: 0 to 10 percent paragravel
Reaction: extremely acid to slightly acid
COMPETING SERIES: There are no other series in this family at this time.
GEOGRAPHIC SETTING: The Edencreek soils are on convex backslopes of mountain slopes. Slopes range from 15 to 90 percent. These soils formed in colluvium over residuum derived from granite and granodiorite. Elevation is 980 to 2215 meters. The climate is Mediterranean with warm, dry summers and cool, moist winters. The mean annual precipitation is 725 to 1025 mm and the mean annual air temperature is 9 to 15 degrees C. The frost free season is 165 to 250 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Grunigen soils. The Grunigen soils are on steep concave mountain slopes, have a mollic epipedon, and a lithic contact within 50 cm.
DRAINAGE AND PERMEABILITY: Well drained, moderately high to high saturated hydraulic conductivity.
USE AND VEGETATION: This soil is used for recreation, wildlife habitat, and watershed. Vegetation is canyon live oak, whiteleaf manzanita, alderleaf mountain mahogany, and poison oak.
DISTRIBUTION AND EXTENT: Sierra Nevada Mountains of California; MLRA 22A. These soils are of limited extent.
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Davis, California
SERIES PROPOSED: Tulare County, California in Sequoia and Kings Canyon National Parks. Source of name from a creek near the type location in Sequoia National Park.
REMARKS:
Particle Size Control Section for this pedon: 28 to 65 cm.
Diagnostic horizons and features recognized in this pedon are:
Ochric Epipedon 2 to 28 cm
Argillic Horizon 28 to 65 cm
Paralithic Contact 65 cm
Paralithic Materials 65 to 92 cm
ADDITIONAL DATA:
NASIS User Pedon ID: 2014CA7924008
Soil classified using the 12th Edition of the Keys to Soil Taxonomy.
National Cooperative Soil Survey
U.S.A.