LOCATION YETI CA

Established Series
Rev: ACF/JPS/ET
08/2016

YETI SERIES

The Yeti series consists of very deep, well drained soils formed in colluvium and residuum derived from sandstone and mudstone. Yeti soils are on hills and mountains and have slopes of 5 to 30 percent. The mean annual precipitation is approximately 2030 millimeters (80 inches) and the mean annual temperature is approximately 11 degrees C (52 degrees F).

TAXONOMIC CLASS: Fine, mixed, superactive, isomesic Typic Palehumults

TYPICAL PEDON: Yeti clay loam - on a southwest-facing, linear slope of 15 percent under Sitka spruce, red alder, salmonberry, and swordfern at 90 feet (27 meters) elevation. (Colors are for moist soil unless otherwise stated. When described April 20, 2005, the soil was moist throughout.)

Oi--0 to 1 inches (0 to 3 centimeters); black (10YR 2/1) slightly decomposed plant material, dark brown (10YR 3/3) dry; 95 percent unrubbed and 80 percent rubbed identifiable fiber of fresh and decomposing salmonberry and alder leaves, Sitka spruce needles and twigs, and sword fern fronds; very strongly acid (pH 4.8); clear smooth boundary. (0 to 4 inches (0 to 10 centimeters) thick)

A--1 to 11 inches (3 to 27 centimeters); very dark brown (10YR 2/2) clay loam, dark grayish brown (10YR 4/2) dry; moderate very fine and fine subangular blocky structure; moderately hard, firm, slightly sticky and moderately plastic; common very fine, fine, medium, and coarse roots; common very fine and fine tubular and many very fine and fine irregular pores; 10 percent gravel; very strongly acid (pH 4.8); clear smooth boundary. (8 to 20 inches (20 to 50 centimeters) thick)

AB--11 to 16 inches (27 to 40 centimeters); very dark brown (10YR 2/2) clay loam, brown (10YR 4/3) dry; moderate very fine and fine subangular blocky structure; slightly hard, friable, slightly sticky and moderately plastic; common very fine, fine, and medium roots; common very fine, fine, medium, and very coarse tubular and common very fine and fine irregular pores; 5 percent gravel; very strongly acid (pH 4.8); clear wavy boundary. (0 to 8 inches (0 to 20 centimeters))

Bt1--16 to 23 inches (40 to 59 centimeters); dark yellowish brown (10YR 4/4) clay loam, light yellowish brown (10YR 6/4) dry; moderate fine and medium subangular blocky structure; hard, firm, moderately sticky and very plastic; few distinct clay films on faces of peds; common fine, medium, and coarse roots; common very fine, fine, medium, and very coarse tubular and common very fine and fine irregular pores; 10 percent gravel; very strongly acid (pH 4.7); clear wavy boundary.

Bt2--23 to 32 inches (59 to 82 centimeters); yellowish brown (10YR 5/6) clay loam, brownish yellow (10YR 6/6) dry; moderate fine and medium subangular blocky structure; moderately hard, firm, very sticky and very plastic; few distinct clay films on faces of peds; moderately few fine and common medium roots; common very fine, fine, and very coarse tubular and common very and fine irregular pores; 3 percent gravel, 5 percent paragravel; very strongly acid (pH 4.5); clear smooth boundary.

Bt3--32 to 43 inches (82 to 109 centimeters); yellowish brown (10YR 5/6) clay loam, yellow (10YR 7/6) dry; weak fine and medium subangular blocky structure; moderately hard, firm, very sticky and very plastic; few distinct clay films on faces of peds and rock fragments; moderately few fine and common medium roots; common very fine, fine, and very coarse tubular and moderately few very fine and fine irregular pores; 5 percent gravel, 5 percent paragravel, 2 percent paracobble; very strongly acid (pH 4.5); gradual smooth boundary.

Bt4--43 to 52 inches (109 to 132 centimeters); yellowish brown (10YR 5/6) paragravelly clay loam, yellow (10YR 7/6) dry; weak medium subangular blocky structure; moderately hard, firm, moderately sticky and moderately plastic; common clay films of rock fragments and few distinct clay films on faces of peds; very few fine roots; moderately few very fine and fine irregular pores; 5 percent gravel, 10 percent paragravel, 2 percent paracobble; very strongly acid (pH 4.5); clear wavy boundary.

Bt5--52 to 67 inches (132 to 170 centimeters); yellowish brown (10YR 5/6) paragravelly clay loam, yellow (10YR 7/6) dry; weak medium subangular blocky; moderately hard, firm, moderately sticky and moderately plastic; few distinct clay films on faces of peds and rock fragments; very few fine roots; very few very fine and fine irregular pores; 10 percent gravel, 20 percent paragravel, 7 percent paracobble; very strongly acid (pH 4.5). (Combined thickness of Bt horizons is 20 to 63 inches (50 to 160 centimeters).

TYPE LOCATION: Redwood National Park, Del Norte County, California; located approximately .75 miles south of False Klamath Cove on the Coastal trail headed toward Hidden Beach from the parking at Lagoon Creek; Section 19, T. 14 N., R. 1 E., WGS84 Decimal degrees 41.5916667 latitude and -124.1008056 longitude; HBLM; USGS Requa Quadrangle; UTM Zone 10 408251mE 4605028mN; NAD83.

RANGE IN CHARACTERISTICS:

Soil moisture: The soil is usually moist in all parts in the soil moisture control section in most years, but becomes dry in the upper part for a time less than 30 days cumulative from approximately September 15 to October 15 in most years. The soils have an udic moisture regime.

Soil temperature: The mean annual soil temperature at 50 centimeters is 10 to 13 degrees C (50 to 52 degrees F). The difference between mean summer and mean winter temperature is 2 to 4 degrees C. The soils have an isomesic temperature regime.

Base Saturation: less than 35 percent by sum of cations at 125 centimeters below the upper boundary of the argillic horizon.

Reaction: strongly to very strongly acid.

Organic Matter: greater than 0.9 percent organic carbon in the upper 15 centimeters of the argillic.

Umbric Epipedon: 25 to 40 centimeters thick.

Particle-Size Control Section (weighted average):

Rock fragments: 0 to 13 percent gravel and 0 to 7 percent paragravel.
Clay content: 35 to 50 percent clay.

Some pedons have an O horizon.

O horizon

Hue: 10YR.
Value: 2 through 6 dry and moist.
Chroma: 1 through 4 dry and moist.

Texture: slightly decomposed organic material.
Wood fragments: 0 to 35 percent.
Reaction: moderately to very strongly acid.

A horizon

Hue: 7.5YR or 10YR.
Value: 4 or 5 dry, 2 or 3 moist.
Chroma: 2 through 4 dry and moist.

Texture of fine earth: loam or clay loam.
Rock fragments: 0 to 13 percent gravel.
Clay content: 25 to 33 percent.

Upper Bt horizon

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

Texture of fine earth: clay loam or clay.
Rock fragments: 0 to 13 percent gravel.
Pararock fragments: 0 to 7 percent paragravel.
Clay content: 35 to 50 percent clay.

Lower Bt horizon

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

Texture of fine earth: clay loam or clay.
Rock fragments: 0 to 30 percent gravel.
Pararock fragments: 0 to 20 percent paragravel; 0 to 7 percent paracobble.
Clay content: 30 to 50 percent clay.

Some pedons have C horizons.

C horizon

Hue: 7.5YR, 10YR, or 2.5Y.
Value: 6 or 7 dry, 4 through 6 moist.
Chroma: 4 through 6 dry and moist.

Texture of fine earth: clay loam or clay.
Rock fragments: 0 to 30 percent gravel.
Pararock fragments: 0 to 25 percent paragravel.
Clay content: 35 to 50 percent clay.

COMPETING SERIES: These are the Bentilla, Cunniff, and Klooqueh series. Bentilla soils are less than 100 centimeters (40 inches) to redoximorphic features. The Cunniff and Klooqueh soils have rounded to subrounded rock fragments.

GEOGRAPHIC SETTING: Yeti soils occur on broad ridges, hillslopes and upper, mountain slopes. Slopes are 5 to 30 percent. Elevations are 3 to 395 meters (5 to 1295 feet). The soils formed in colluvium and residuum derived from sandstone and mudstone. The climate is humid with cool, foggy summers and cool, moist winters. Coastal influence limits the annual and diurnal range in temperature. Mean annual precipitation ranges from 1650 to 2290 millimeters (65 to 90 inches). Mean winter temperature (December, January, and February) is approximately 9 degrees C; mean summer temperature (June, July, and August) is approximately 14 degrees C; and the mean annual temperature is 10 to 13 degrees C (50 to 55 degrees F). Frost-free season is 250 to 300 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Sasquatch and Sisterrocks soils. Sasquatch is fine-loamy. Sisterrocks is loamy-skeletal. The Sasquatch soils are found in concave positions or below Yeti on steeper slopes. The Sisterrocks soils are found below Yeti on convex slopes or on spur ridges above Yeti.

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

USE AND VEGETATION: This soil is used for commercial timber, recreation, wildlife, and watershed. Natural vegetation consists of redwood, Douglas-fir, western hemlock, Sitka Spruce, tanoak, Pacific rhododendron, evergreen huckleberry, salal, salmonberry, western sword fern, and redwood sorrel.

DISTRIBUTION AND EXTENT: California Coastal Redwood Belt; MLRA 4B. The series is not extensive.

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

SERIES ESTABLISHED: Humboldt Del Norte area, California 2007.

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

1. Umbric epipedon - the zone from 3 to 40 centimeters (A horizons)
2. Argillic horizon - the zone from 40 to 170 centimeters (Bt horizons)
3. Palehumults feature - clay continues at 37 percent to 170 centimeters, percent does not decrease by 20 percent of its maximum within 150 centimeters of the ground surface.
4. Particle-size control section - the zone from 40 to 90 centimeters, averages 37 percent clay, by weight, and 6 percent rock fragments, by volume.

ADDITIONAL DATA: NASIS User Pedon 05CA605REDW028

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

National Cooperative Soil Survey
U.S.A.