LOCATION HULLYGULLY CA

Established Series
REV: BAL/JPS/ET/RLM/SAA/
10/2016

HULLYGULLY SERIES

The Hullygully series consists of very deep, well drained soils formed in colluvium and residuum derived from metamorphic rocks. These soils are on mountains and have slopes of 2 to 75 percent. Mean annual precipitation is 1524 millimeters (59 inches) and the mean annual temperature is 14 degrees C (58 degrees F).

TAXONOMIC CLASS: Loamy-skeletal, mixed, active, mesic Typic Dystroxerepts

TYPICAL PEDON: Hullygully very gravelly loam, on a south-facing, concave, 55 percent slope under conifers at an elevation of 680 meters. When described on September 29, 2002 the soil was dry throughout. (Colors are for dry soil unless otherwise stated).

Oi--0 to 4 centimeters (0 to 2 inches); very dark grayish brown (2.5Y 3/2), slightly decomposed plant material; abrupt smooth boundary. (0 to 10 centimeters thick)

A1--4 to 10 centimeters (2 to 4 inches); light yellowish brown (2.5Y 6/3), very gravelly loam, dark olive brown (2.5Y 3/3) moist; moderate very fine subangular blocky structure; slightly hard, very friable, nonsticky and nonplastic; many very fine, fine, and medium roots; many very fine, fine, and medium, and few coarse tubular pores; 45 percent gravel, 5 percent cobbles; moderately acid (pH 5.8); clear wavy boundary.

A2--10 to 18 centimeters (4 to 7 inches); light yellowish brown (2.5Y 6/4), very gravelly loam, light olive brown (2.5Y 5/4) moist; strong fine subangular blocky structure; hard, very friable, slightly sticky and slightly plastic; many very fine, fine, and medium, and few coarse roots; many very fine and fine, common medium, and few coarse tubular pores; 50 percent gravel, 5 percent cobbles; moderately acid (pH 5.6); clear wavy boundary. (Combined thickness of the A horizons is 5 to 40 centimeters)

Bw1--18 to 45 centimeters (7 to 18 inches); light yellowish brown (10YR 6/4), gravelly loam, dark yellowish brown (10YR 4/4), moist; moderate medium subangular blocky structure; hard, very friable, moderately sticky and moderately plastic; many fine and medium, and common very fine and coarse roots; many very fine and fine, common medium, and few coarse tubular pores; 25 percent gravel, 5 percent cobbles; strongly acid (pH 5.4); clear wavy boundary.

Bw2--45 to 97 centimeters (18 to 38 inches); brownish yellow (10YR 6/6), very gravelly loam, dark yellowish brown (10YR 4/6) moist; moderate medium subangular blocky structure; hard, very friable, moderately sticky and moderately plastic; many fine and medium, and common very fine and coarse roots; many very fine and fine, common medium, and few coarse tubular pores; 38 percent gravel, 2 percent cobbles; strongly acid (pH 5.4); clear wavy boundary. (Combined thickness of Bw horizons is 55 to 140 centimeters)

C1--97 to 155 centimeters (38 to 61 inches); pale olive (5Y 6/3), very gravelly silty clay loam, olive (5Y 5/3) moist; massive; hard, friable, moderately sticky and moderately plastic; many medium, and common very fine, fine and coarse roots; common very fine, fine, medium, and few coarse tubular pores; 40 percent gravel, 5 percent cobbles; moderately acid (pH 5.8); clear wavy boundary.

C2--155 to 180 centimeters (61 to 71 inches); black (2.5Y 2.5/1), extremely channery loamy sand, black (2.5Y 2.5/1) moist; massive; hard, very friable, nonsticky and nonplastic; common medium and coarse roots; many fine and medium interstitial, and common coarse tubular pores; 85 percent channers; moderately acid (pH 5.8). (Combined thickness of C horizons 0 to 70 centimeters thick)

TYPE LOCATION: Humboldt County, California; Hoopa Tribal Nation; about 3 kilometers south of Weitchpec; northwest quarter of section 26, T. 9 N, R 4 E; USGS Weitchpec Quadrangle, Ca., WGS84 Decimal degrees 41.1384444 latitude and -123.7001389 longitude; UTM 441241mE, 4554361mN, zone 10, NAD 83.

RANGE IN CHARACTERISTICS:

Soil moisture: The soil moisture control section is dry from July 1st to October 15th and moist in all parts from November 15 to June 1st. This soil has a xeric moisture regime.

Soil temperature: The mean annual soil temperature is 10 to 15 degrees C (50 to 59 degrees F). The difference between the mean summer and mean winter temperature is 6 degrees C or greater. This soil has a mesic soil temperature regime.

Base saturation: by the ammonium acetate method is less than 60 percent between 25 and 75 centimeters below the mineral soil surface.

Surface fragments: 0 to 10 percent gravel

Particle-Size Control Section (weighted average):

Rock fragments: 35 to 70 percent gravel and cobbles.
Clay content: 10 to 34 percent clay.

A Horizon

Hue: 10YR or 2.5yr
Value: 5 through 7, 3 through 5 moist.
Chroma: 2 through 4, dry or moist.

Texture of fine earth: loam or silt loam.
Rock fragments: 30 to 50 percent gravel and 0 to 5 percent cobbles.
Clay content: 5 to 26 percent.
Soil reaction: very strongly to slightly acid

Bw Horizons

Hue: 7.5YR, 10YR, 2.5Y, 5Y,
Value: 6 or 7, 3 through 5 moist.
Chroma: 2 through 6, dry or moist.

Texture of fine earth: sandy loam, loam, or clay loam.
Rock fragments: 20 to 80 percent gravel and cobbles.
Clay content: 5 to 30 percent.
Soil reaction: very strongly to moderately acid

C Horizon

Some pedons do not have C horizons.

Hue: 5Y
Value: 6 or 7 dry, or 4 or 5 moist.
Chroma: 2 or 3, dry or moist

Texture of fine earth: loamy sand, silty clay loam, sandy clay loam, or sandy loam.
Rock fragments: 35 to 90 percent gravel and cobbles.
Clay content: 2 to 35 percent.

COMPETING SERIES: These are the Kindig, Mayacama, Neuns, and Sheetiron series. Kindig soils are 100 to 150 centimeters (40 to 60 inches) to paralithic contact. Mayacama, Neuns, and Sheetiron soils are 50 to 100 centimeters (20 to 40 inches) to a lithic contact.

GEOGRAPHIC SETTING: These soils occur on low mountain slopes, landslides, and colluvial fans with slopes of 2 to 75 percent at elevations of 17 to 1200 meters (56 to 3937 feet). These soils formed in colluvium and residuum derived from schist and phyllite. The climate is subhumid with warm, dry summers and cool, wet winters. The mean annual precipitation is 1250 to 2032 millimeters (49 to 80 inches). Mean January temperature is about 5 degrees C; mean July temperature is about 18 degrees C; and the mean annual temperature is 13 to 15 degrees C (55 to 59 degrees F). Frost-free season is 150 to 250 days

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Burroin and Bagaul soils. Burroin soils are moderately deep to highly fractured schist. Bagaul soils are very deep and have an argillic horizon.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained; high runoff; moderately high saturated hydraulic conductivity.

USE AND VEGETATION: Used for timber production, wildlife habitat and watershed. Native vegetation is Douglas-fir, tanoak, Pacific madrone, with an understory of salal, Cascade barberry, poison oak, and bracken fern.

DISTRIBUTION AND EXTENT: Siskiyou-Trinity Area, MLRA 5. These soils are of small extent.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California

SERIES ESTABLISHED: Northern Humboldt Area, Humboldt County, California, 2013. Proposed 2001.

REMARKS: Diagnostic horizons and features include:

1. Ochric horizon - The zone from 0 to 18 centimeters (Oi, A1, A2 horizons)
2. Cambic horizon - The zone from 18 to 97 centimeters (Bw1, Bw2 horizons)
3. Particle-size control section - the zone from 29 to 104 centimeters, averages 25 percent clay by weight, and 34 percent gravel and 3 percent cobbles by volume.

ADDITIONAL DATA:

NSSL pedon number: 05N0648, 05N0642 and 08N0449 (supporting pedons)
NASIS user pedon ID: 03CA023605009

Soil classified using the 12th Edition of the Keys to Soil Taxonomy.

National Cooperative Soil Survey
U.S.A.