LOCATION KINSEYRIDGE CA

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

KINSEYRIDGE SERIES

The Kinseyridge series consists of very deep, well drained soils formed in colluvium and residuum derived from schist. These soils are on mountains and have slopes of 9 to 50 percent. Mean annual precipitation is 2540 millimeters (100 inches) and the mean annual temperature is 13 degrees C (55 degrees F).

TAXONOMIC CLASS: Loamy-skeletal, mixed, active, mesic Pachic Humixerepts

TYPICAL PEDON: Kinseyridge very gravelly loam under a stand of Bristly dogtail grass, blue wildrye, soft brome, and orchard grass. When described on August 26, 2004, the soil was dry throughout. (Colors are for dry soil unless otherwise stated).

A1--0 to 20 centimeters (0 to 8 inches); brown (10YR 4/3) very gravelly loam, very dark grayish brown (10YR 3/2) moist; weak medium subangular blocky parting to strong very fine granular structure; soft, very friable, nonsticky and nonplastic; common very fine and fine roots; many very fine and fine tubular pores; 50 percent gravel; very strongly acid (pH 4.8); clear smooth boundary.

A2--20 to 48 centimeters (8 to 19 inches); brown (10YR 5/3) very gravelly loam, very dark grayish brown (10YR 3/2) moist; moderate medium subangular blocky parting to strong very fine granular structure; soft, very friable, nonsticky and nonplastic; common very fine and fine roots; many fine irregular pores; 45 percent gravel; very strongly acid (pH 5.0); clear smooth boundary.

A3--48 to 100 centimeters (8 to 39 inches); yellowish brown (10YR 5/4) very gravelly loam, dark brown (10YR 3/3) moist; moderate medium subangular blocky parting to strong very fine granular structure; soft, very friable, nonsticky and nonplastic; many very fine, common fine and medium roots; many very fine, and common fine tubular pores; 45 percent gravel; very strongly acid (pH 5.0); clear smooth boundary. (Combined thickness of the A horizons is 70 to 110 centimeters)

Bw1--100 to 148 centimeters (39 to 58 inches); yellowish brown (10YR 5/4), very gravelly loam, dark brown (10YR 3/3), moist; weak fine subangular blocky structure; soft, very friable, slightly sticky and slightly plastic; common very fine through medium roots; many fine tubular pores; 50 percent gravel, 5 percent cobbles; strongly acid (pH 5.2); clear smooth boundary.

Bw2--148 to 160 centimeters (58 to 63 inches); yellowish brown (10YR 5/6), extremely gravelly loam, dark yellowish brown (10YR 3/4), moist; weak fine subangular blocky structure; soft, very friable, slightly sticky and slightly plastic; common very fine through medium roots; common fine tubular pores; 45 percent gravel, 15 percent cobbles; strongly acid (pH 5.2). (Combined thickness of Bw horizons is 40 to 75 centimeters)

TYPE LOCATION: Humboldt County, California; Kinseyridge; USGS Grouse Mountain topographic quadrangle; WGS84 Decimal degrees 40.8411667 latitude and -123.7333611 longitude; UTM zone 10, 438268mE, 4521189mN, 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 soil 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.

Soil reaction: very strongly acid to strongly acid

Base saturation (by ammonium acetate) is less than 60 percent between 25 and 75 centimeters.

The umbric epipedon is from 50 to 110 centimeters thick.

Surface Fragments; 0 to 10 percent gravel

Particle Size Control Section (weighted average):

Clay content: 10 to 26 percent.
Rock fragments: 40 to 55 percent gravel and 0 to 10 percent cobbles

A Horizons

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

Texture of fine earth: loam
Clay content: 10 to 26 percent
Rock fragments: 40 to 55 percent gravel

Bw Horizons

Hue: 10YR or 2.5Y
Value: 3 through 6 dry, 3 or 4 moist.
Chroma: 4 or 6 dry, and 2 through 4 moist.

Texture of fine earth fraction: loam
Clay content: 18 to 26 percent
Rock fragments: 40 to 55 percent gravel, 0 to 15 percent cobbles

COMPETING SERIES: These are the Fiddletown and Sidehill series. Fiddletown soils are moderately deep to a paralithic contact and Sidehill soils have sandstone subangular rock fragments throughout.

GEOGRAPHIC SETTING: These soils occur on upper mountain slopes. Slopes are 9 to 50 percent. They are on linear positions. Elevations are 800 to 1646 meters (2625 to 5400 feet). These soils formed in residuum and colluvium derived from schist. The climate is subhumid with warm dry summers and cold moist winters. The mean annual precipitation is 2032 to 2794 millimeters (80 to 110 inches). Mean January temperature is about 5 degrees C (41 degrees F); mean July temperature is about 18 degrees C (64 degrees F); and the mean annual temperature is 10 to 15 degrees C (50 to 59 degrees F). The frost free period is about 75 to 150 days.

GEOGRAPHICALLY ASSOCIATED SOILS: This is the Titlow soil. The Titlow soils are on convex and linear positions, are coarse-loamy with less than 18 percent clay in the particle size control section, and are 100 to 150 centimeters to bedrock.

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

USE AND VEGETATION: Used for grazing, watershed protection and wildlife habitat. Native vegetation is bristly dogtail grass, soft brome, blue wildrye, and orchardgrass. Douglas-fir readily invades in the absence of fire.

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 Counties, California, 2013.

REMARKS: Diagnostic horizons and features recognized in this pedon are:

1. Umbric epipedon - the zone from 0 to 100 centimeters (A1, A2,& A3 horizons)
2. Cambic horizon - the zone from 100 to 160 centimeters (Bw1 & Bw2 horizons)
3. Particle-size control section - the zone from 25 to 100 centimeters, averages 15 percent clay, by weight, and 45 percent rock fragments, by volume.

Additional Data:

NASIS User Pedon ID: 04CA023605060

Soil classified using the 12th Edition of the Keys to Soil Taxonomy. These soils were previously classified as Loamy-skeletal, mixed, active, mesic Humic Dystroxerepts.

National Cooperative Soil Survey
U.S.A.