LOCATION WOBONUCH CA
Established Series
JBB/CES
09/2021
WOBONUCH SERIES
The Wobonuch series consists of very deep, somewhat poorly drained soils formed in organic material over alluvium derived from granitic rocks. The Wobonuch soils are on flood-plain steps of the Sierra Nevada Mountains. Slopes range from 2 to 12 percent. The mean annual precipitation is about 1080 mm and the mean annual air temperature is about 9 degrees C.
TAXONOMIC CLASS: Sandy, isotic, mesic Hydraquentic Humaquepts
TYPICAL PEDON: Wobonuch mucky peat on a south east facing (140 degree), 11 percent slope under a cover of bulrush and perennial forbs at an elevation of 2066 meters. (Colors are for dry soils unless otherwise noted. When described on August 23, 2017 the soil was wet throughout. A water table was observed at 105 cm.)
Oe--0 to 15 cm; very dark grayish brown (10YR 3/2) mucky peat, black (7.5YR 2/1) moist; about 25 percent fiber, 20 percent rubbed; 1 percent sand; slightly hard, friable, nonsticky, nonplastic; many very fine, and common fine and medium roots throughout; many very fine irregular pores; NaF pH 8.0; moderately acid (pH 5.9); clear wavy boundary. (0 to 30 cm thick) Lab sample # 17N04660
A--15 to 31 cm; dark grayish brown (10YR 4/2) highly organic coarse sandy loam, black (7.5YR 2/1) moist; about 3 percent fiber, 0 percent rubbed; 67 percent sand; 23 percent silt; 10 percent clay; slightly hard, friable, slightly sticky, nonplastic; common very fine, fine and medium roots throughout; many very fine irregular pores; NaF pH 8.5; strongly acid (pH 5.2); abrupt wavy boundary. (10 to 75 cm thick) Lab sample # 17N04661
Bw--31 to 44 cm; dark grayish brown (10YR 4/2) coarse sand, very dark brown (10YR 2/2) moist; 92 percent sand; 5 percent silt; 3 percent clay; weak coarse subangular blocky, and weak medium subangular blocky structure; slightly hard, friable, nonsticky, nonplastic; common very fine, fine, and medium roots throughout; common very fine interstitial pores; 15 percent medium distinct irregular dark brown (7.5YR 3/4) moist, masses of oxidized iron in matrix; NaF pH 8.8; strongly acid (pH 5.4); very abrupt smooth boundary. (0 to 25 cm thick) Lab sample # 17N04662
Ab--44 to 50 cm; very dark grayish brown (10YR 3/2) highly organic fine sandy loam, black (10YR 2/1) moist; 55 percent sand; 33 percent silt; 12 percent clay; slightly hard, friable, nonsticky, nonplastic; few very fine and common fine roots throughout; common very fine irregular pores; NaF pH 9.0; strongly acid (pH 5.4); very abrupt smooth boundary. (0 to 25 cm thick) Lab sample # 17N04663
C--50 to 83 cm; grayish brown (2.5Y 5/2) coarse sand, very dark grayish brown (2.5Y 3/2) moist; 91 percent sand; 7 percent silt; 3 percent clay; structureless massive; loose, loose, nonsticky, nonplastic; few fine roots throughout; common fine interstitial pores; 10 percent medium prominent irregular yellowish red (5YR 4/6) moist, masses of oxidized iron in matrix; moderate sulfurous odor; NaF pH 9.3; moderately acid (pH 5.8); very abrupt smooth boundary. (25 to 75 cm thick) Lab sample # 17N04664
A'b--83 to 88 cm; 50 percent white (2.5Y 8/1) and 50 percent grayish brown (10YR 5/2) highly organic sandy loam, 50 percent dark grayish brown (2.5Y 4/2) and 50 percent very dark grayish brown (2.5Y 3/2) moist; 55 percent sand; 30 percent silt; 16 percent clay; slightly hard, friable, slightly sticky, nonplastic; common very fine irregular pores; 3 percent subrounded indurated granite gravel; NaF pH 8.0; moderately acid (pH 6.0); very abrupt smooth boundary. (0 to 25 cm thick) Lab sample # 17N04665
Cg1--88 to 157 cm; gray (5Y 6/1) loamy coarse sand, very dark gray (5Y 3/1) moist; 84 percent sand; 12 percent silt; 4 percent clay; structureless massive; slightly hard, firm, nonsticky, nonplastic; common fine interstitial pores; reduced matrix; NaF pH 10.0; moderately acid (pH 6.0); gradual smooth boundary. Lab sample # 17N04666
Cg2--157 to 208 cm; gray (2.5Y 6/1) loamy coarse sand, olive gray (5Y 4/2) moist; 80 percent sand; 14 percent silt; 6 percent clay; structureless massive; soft, firm, nonsticky, nonplastic; common fine interstitial pores; reduced matrix; NaF pH 9.2; slightly acid (pH 6.1). Lab sample # 17N04667
TYPE LOCATION: Tulare County, California, in Crescent Meadow in the Giant Forest of Sequoia National Park; USGS 7.5 minute topographic quadrangle: Giant Forest, California; WGS84 36.559127 latitude and -118.750206 longitude; UTM zone 11 4047392 meters N 343372 meters E NAD83.
RANGE IN CHARACTERISTICS:
Soil temperature: The mean annual soil temperature at 50 cm is 8 to 11 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 an aquic soil moisture regime. The soil is saturated in some part throughout the year, with a seasonal high water table dropping below 50 cm in late summer and fall.
Diagnostic Feature(s):
Umbric epipedon thickness: 18 to 75 cm
Aquic conditions: present within 50 cm of the soil surface
Organic matter: 2 to 24 percent in the epipedon
Base saturation: less than 50 percent (by ammonium acetate)
Depth to redoximorphic features: 25 to 50 cm
Particle size control section weighted average:
Rock fragments: 0 to 15 percent gravel
Clay content: 1 to 18 percent
Oe or Oa horizon (where present)
Hue: 7.5YR, 10YR
Value: 3 or 4 dry, 2 moist
Chroma: 1 or 2, dry or moist
Texture: mucky peat, peat
Rock fragments: 0 to 15 percent gravel
Reaction: strongly to moderately acid
A or Ab horizons (where present)
Hue: 7.5YR, 10YR
Value: 3 to 5 dry, 2 or 3 moist
Chroma: 1 or 2, dry or moist
Texture: sandy loam, fine sandy loam, coarse sandy loam, loamy sand, loamy coarse sand
Clay content: 3 to 18 percent
Rock fragments: 0 to 15 percent gravel
Reaction: strongly to moderately acid
Bw horizons (where present)
Hue: 7.5YR, 10YR
Value: 4 to 6 dry, 2 to 4 moist
Chroma: 2 or 3, dry or moist
Texture: sandy loam, coarse sandy loam, loamy sand, loamy fine sand, loamy coarse sand, sand, coarse sand
Clay content: 2 to 10 percent
Rock fragments: 0 to 15 percent gravel
Reaction: strongly to moderately acid
Redoximorphic features:
Masses of oxidized iron in matrix
Quantity: common to many
Size: fine to coarse
C horizons
Hue: 10YR, 2.5Y
Value: 4 to 6 dry, 2 to 4 moist
Chroma: 2 or 3, dry or moist
Texture: sandy loam, coarse sandy loam, loamy sand, loamy coarse sand, coarse sand
Clay content: 1 to 8 percent
Rock fragments: 0 to 15 percent gravel
Reaction: strongly to slightly acid
Redoximorphic features:
Masses of oxidized iron in matrix
Quantity: common to many
Size: fine to coarse
Cg horizons
Hue: 10YR, 2.5Y, 5Y
Value: 6 or 7 dry, 3 to 5 moist
Chroma: 1 or 2, dry or moist
Texture: sandy loam, coarse sandy loam, loamy sand, loamy coarse sand, coarse sand
Clay content: 1 to 8 percent
Rock fragments: 0 to 15 percent gravel
Reaction: strongly to slightly acid
Redoximorphic features:
Reduced matrix
COMPETING SERIES: There are no other series in this family at this time.
GEOGRAPHIC SETTING: The Wobonuch soils are on concave to linear treads of flood-plain steps. Slopes range from 2 to 12 percent. These soils formed in organic material over alluvium derived from granite and granodiorite. Elevation is 1520 to 2130 meters. The climate is Mediterranean with warm, dry summers and cool, moist winters. The mean annual precipitation is 535 to 1165 mm and the mean annual air temperature is 7 to 11 degrees C. The frost free season is 120 to 155 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Wuksachi soils. The Wuksachi soils are on flood plains and low flood plain steps and are very poorly drained.
DRAINAGE AND PERMEABILITY: Somewhat poorly drained, moderately high to very high saturated hydraulic conductivity. Occasional flooding for brief (2 to 7 days) duration beginning in April, occasional ponding for long (7 to 30 days) duration beginning in April. Seasonal high water table at 25 to 50 cm.
USE AND VEGETATION: This soil is used for recreation, wildlife habitat, and watershed. Vegetation is bulrush, corn lily, common cowparsnip, narrow-leaved lotus, western cowbane and whitestem hedgenettle.
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 the band of Western Mono (Monache) that historically gathered near Grant Grove in summer.
REMARKS:
Particle Size Control Section for this pedon: 15 to 115 cm
Diagnostic horizons and features recognized in this pedon are:
Umbric Epipedon 15 to 50 cm
Redox Concentrations 31 to 44 cm and 50 to 83 cm
Aquic Conditions 31 to 208 cm
Reduced Matrix 88 to 208 cm
ADDITIONAL DATA:
Pedon information for this type location only:
Pedon Type: OSD pedon Lab Source ID: KSSL
Pedon Purpose: laboratory sampling site Lab Pedon #: 17N0932
NASIS User Pedon ID: S2017CA107003
Soil classified using the 12th Edition of the Keys to Soil Taxonomy.
National Cooperative Soil Survey
U.S.A.