LOCATION TULLYCREEK CA
Established Series
REV: BAL/JPS/ET
01/2013
TULLYCREEK SERIES
The Tullycreek series consists of very deep, well drained soils formed in colluvium and residuum from weakly consolidated fluvial deposits derived from mixed sources. These soils are on mountains and have slopes of 9 to 50 percent. Mean annual precipitation is 1524 millimeters (60 inches) and the mean annual temperature is 12 degrees C (54 degrees F).
TAXONOMIC CLASS: Fine, parasesquic, mesic Xeric Palehumults
TYPICAL PEDON: Tullycreek sandy clay loam - under a stand of Douglas-fir, tanoak, Pacific madrone and salal. When described on September 25, 2002 the soil was dry throughout. (Colors are for dry soil unless otherwise stated).
Oi--0 to 4 centimeters (0 to 2 inches); slightly decomposed plant material; about 90 percent fiber, 80 percent rubbed; ; moderately acid (pH 5.6); abrupt smooth boundary. (0 to 10 centimeters thick)
A1--4 to 15 centimeters (2 to 6 inches); strong brown (7.5YR 5/6), paragravelly silty clay loam, brown (7.5YR 4/4), moist; moderate very fine granular structure; soft, very friable, slightly sticky and slightly plastic; many very fine, common fine, few medium roots; many very fine, fine, medium, and few coarse tubular pores; 10 percent paragravel, 5 percent gravel; strongly acid (pH5.3); abrupt wavy boundary.
A2--15 to 25 centimeters (6 to 10 inches); strong brown (7.5YR 5/6), paragravelly silty clay loam, brown (7.5YR 4/4), moist; moderate very fine granular structure; slightly hard, very friable, slightly sticky and slightly plastic; many very fine, common fine, few medium roots; many very fine, fine, medium, and few coarse tubular pores; 10 percent paragravel, 5 percent gravel; strongly acid (pH 5.3); clear wavy boundary. (combined thickness of the A horizons is 5 to 30 centimeters)
Bt1--25 to 44 centimeters (10 to 17 inches); yellowish red (5YR 4/6), paragravelly clay, dark reddish brown (5YR 3/4), moist; moderate medium subangular blocky structure; slightly hard, friable, very sticky and moderately plastic; many medium, common fine and coarse roots; many medium, and few coarse tubular pores; few faint clay films on all faces of peds; 10 percent paragravel, 5 percent gravel; strongly acid (pH 5.2); clear smooth boundary.
Bt2--44 to 67 centimeters (17 to 26 inches); red (2.5YR 4/8), paragravelly clay, reddish brown (2.5YR 4/4), moist; moderate medium subangular blocky structure; hard, firm, very sticky and moderately plastic; many fine, common medium, and few coarse roots; common medium, and few coarse tubular pores; few patchy faint clay films on all faces of peds; 10 percent gravel, 5 percent paragravel; strongly acid (pH 5.2); clear smooth boundary.
Bt3--67 to 101 centimeters (26 to 40 inches); red (2.5YR 4/8), silty clay, reddish brown (5YR 4/4), moist; moderate fine angular blocky structure; hard, firm, moderately sticky and slightly plastic; common fine, medium, and coarse roots; common medium, and few coarse tubular pores; common distinct clay films on all faces of peds; 2 percent paragravel, 8 percent gravel; strongly acid (pH 5.2); clear smooth boundary.
Bt4--101 to 137 centimeters (40 to 54 inches); yellowish red (5YR 4/6), clay, yellowish red (5YR 4/6), moist; moderate medium subangular blocky structure; slightly hard, friable, moderately sticky and slightly plastic; common medium, and coarse roots; common medium, and coarse tubular pores; few distinct clay films on all faces of peds; 3 percent paragravel, 2 percent gravel; strongly acid (pH 5.3); clear wavy boundary. (Combined thickness of Bt horizons is 90 to 210 centimeters thick)
C--137 to 180 centimeters (54 to 71 inches); yellowish red (5YR 5/8), clay, strong brown (7.5YR 4/6), moist; massive; soft, friable, slightly sticky and slightly plastic; common medium, and coarse roots; few medium, few coarse tubular pores; 3 percent paragravel, 2 percent gravel; strongly acid (pH 5.3). (0 to 50 centimeters thick)
TYPE LOCATION: Humboldt County, California; about 3 kilometers west of Weitchpec near Tully Creek; section 11, township 9 north and range 4 east; 41 degrees, 11 minutes, 0.50 seconds north latitude, and 123 degrees, 48 minutes, 53.90 seconds west longitude; UTM 431650 meters E, 4559444 meters N, zone 10.
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 greater than 6 degrees C. This soil has a mesic soil temperature regime.
Base saturation: by the ammonium acetate method is less than 35 percent at 180 centimeters
Surface Fragments: 0 to 5 percent gravel and 0 to 5 percent cobble
Soil reaction: moderately acid to very strongly acid throughout the soil profile.
Particle-Size Control Section (weighted average):
Pararock Fragments: 0 to 15 percent paragravels
Rock Fragments: 0 to 15 percent gravels
Clay content: 40 to 50 percent clay
[et1]A Horizon
Hue: 7.5YR
Value: 4 or 5 dry, 3 or 4 moist
Chroma: 3 through 6, dry or moist
Texture of fine earth: silty clay loam
Rock fragments: 0 to 10 percent gravel
Pararock fragments: 0 to 15 percent paragravel
Clay content: 30 to 37 percent
Bt Horizons
Hue: 2.5YR, 5YR or 7.5YR
Value: 4 through 6 dry, 3 through 5 moist
Chroma: 4 through 8, dry or moist
Texture of fine earth: silty clay or clay
Rock fragments: 0 to 15 percent gravel
Pararock fragments: 0 to 15 percent paragravel
Clay content: 40 to 50 percent
C Horizons
Hue: 2.5YR, 5YR or 7.5YR
Value: 4 through 6 dry, 3 through 5 moist
Chroma: 4 through 8, dry or moist
Texture of fine earth: silty clay or clay
Rock fragments: 0 to 15 percent gravel
Pararock fragments: 0 to 30 percent paragravel and 0 to 15 percent paracobble
Clay content: 40 to 50 percent
COMPETING SERIES: There are no other series in this family at this time.
GEOGRAPHIC SETTING: These soils occur on summits of mountains and mountain slopes with slopes of 9 to 50 percent at elevations of 46 to 984 meters (151 to 3228 feet). These soils formed in colluvium and residuum from fluvial deposits derived from mixed sources. The climate is subhumid with warm dry summers and cool moist winters. The mean annual precipitation is 1250 to 2032 millimeters (49 to 80 inches). Mean January temperature is about 7 degrees C (44 degrees F); mean July temperature is about 20 degrees C (68 degrees F); and the mean annual temperature is 10 to 15 degrees C (50 to 59 degrees F). The frost free season is about 75 to 150 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Hewent,
Tellopeak, and
Howlersoils. Hewent soils are moderately deep to metamorphic basalt bedrock. Tellopeak soils are shallow to bedrock. Howler soils are very deep and do not have an argillic horizon.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained; medium to high runoff; moderately low saturated hydraulic conductivity.
USE AND VEGETATION: Used for timber production, watershed and wildlife habitat. Native vegetation is Douglas-fir, tanoak, Pacific madrone, and chinquapin with an understory of salal, Oregon grape, poison oak, and bracken fern.
DISTRIBUTION AND EXTENT: Siskyou-Trinity Area, MLRA 5. These soils are of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: Humboldt and Del Norte Area, Humboldt County, California, 2003.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
1. Ochric epipedon - the zone from 0 to 25 centimeters (Oi & A horizon)
2. Argillic horizon - the zone from 25 to 137 centimeters (Bt1, Bt2, Bt3 & Bt4 horizons)
3. Ultisol feature - base saturation of less than 35 percent at the critical depth, 125 centimeters below the upper boundary of the argillic horizon
4. Humult feature greater than 22 kilograms per square meter of organic carbon to a depth of 1 meter
5. Palehumult features - Clay remains at least 85 percent of its maximum to a depth of 200 centimeters
6. Particle-size control section - the zone from 25 to 75 centimeters, averages 45 percent clay, by weight, and 3 percent gravel and 8 percent paragravel, by volume.
Soil classified using the 11th Edition of the Keys to Soil Taxonomy.
NSSL pedon number: 05N0638 clay percentages were re-calculated due to poor dispersion and used for series range. Filed textures show a lower clay percentage.
National Cooperative Soil Survey
U.S.A.