LOCATION CHENONE CA

Established Series
Rev: JPS/ET
07/2016

CHENONE SERIES

The Chenone series consists of very deep, well drained soils on floodplain-steps. These soils formed in alluvium derived from mixed sources. Slope ranges from 0 to 2 percent. The mean annual precipitation is about 1524 millimeters (59 inches) and the mean annual temperature is about 16 degrees C (60 degrees F).

TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, thermic Fluventic Haploxerolls

TYPICAL PEDON: Chenone fine sandy loam - under a stand of annual and perennial grasses. When described on April 16, 2008, the soil was moist throughout. (Colors are for dry soil unless otherwise noted.)

Ap1--0 to 10 centimeters (0 to 4 inches); grayish brown (2.5Y 5/2) loam, very dark grayish brown (2.5Y 3/2) moist; moderate fine granular structure; slightly hard, friable, slightly sticky and non-plastic; many very fine, common fine and few medium roots; common very fine and fine irregular and tubular pores; slightly acid (pH 6.1); clear smooth boundary.

Ap2--10 to 30 centimeters (4 to 12 inches); grayish brown (2.5Y 5/2) loam, very dark grayish brown (2.5Y 3/2) moist; moderate fine subangular blocky structure; slightly hard, friable, slightly sticky and non-plastic; common very fine and fine roots; common very fine and fine irregular and tubular pores; slightly acid (pH 6.2); clear smooth boundary. (Combined thickness of the Ap horizons is 25 to 40 centimeters)

C--30 to 57 centimeters (12 to 22 inches); light brownish gray (2.5Y 6/2) fine sandy loam, dark grayish brown (2.5Y 4/2) moist; massive; soft, very friable, slightly sticky and non-plastic; common very fine and few fine roots; common very fine interstitial pores; slightly acid (pH 6.5); clear smooth boundary. (0 to 50 centimeters)

Ab--57 to 80 centimeters (22 to 32 inches); grayish brown (2.5Y 5/2) loam, very dark grayish brown (2.5Y 3/2) moist; weak fine subangular blocky structure; slightly hard, friable, slightly sticky and non-plastic; common very fine and few fine roots; common very fine and fine irregular pores; neutral (pH 6.8); gradual smooth boundary. ((0 to 50 centimeters)

C'1--80 to 110 centimeters (32 to 43 inches); light brownish gray (2.5Y 6/2) loam, very dark grayish brown (2.5Y 3/2) moist; massive; slightly hard, friable, slightly sticky and non-plastic; common very fine and few fine roots; common very fine irregular pores; neutral (pH 7.0); gradual smooth boundary. (0 to 100 centimeters)

C'2--110 to 170 centimeters (43 to 67 inches); light brownish gray (2.5Y 6/2) loam, very dark grayish brown (2.5Y 3/2) moist; massive; slightly hard, friable, slightly sticky and non-plastic; few very fine and fine roots; common very fine interstitial pores; neutral (pH 7.1). (0 to 100 centimeters)

TYPE LOCATION: Humboldt County, California; Hoopa Valley; USGS Hoopa topographic quadrangle; WGS84 Decimal degrees 41.0705556 latitude and
-123.6876667 longitude; UTM Zone 10 442228mE, 4546816mN, NAD83.

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 15 to 20 degrees C (59 to 68 degrees F). The difference between the mean summer and mean winter temperature is 6 degrees C or greater. This soil has a thermic soil temperature regime.

Soil reaction: neutral or slightly acid throughout.

Organic carbon irregularly decreases with depth from 25 to 125 centimeters.

Particle Size Control Section (weighted average):
Clay content: 10 to 17 percent

A horizons

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

Texture of the fine earth fraction: loam
Clay content: 13 to 17 percent

Ab horizons

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

Texture of the fine earth fraction: loam
Clay content: 10 to 17 percent

C horizons

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

Texture of the fine earth fraction: fine sandy loam or loam
Clay content: 10 to 17 percent

C' horizons

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

Texture of the fine earth fraction: loamy sand, sandy loam, fine sandy loam, very fine sandy loam, or loam
Clay content: 3 to 17 percent

COMPETING SERIES: These are the Arroyo Seco, Goleta, Kelsey, Pico and Rossmoor series. The Arroyo Seco, Goleta, Kelsey and Pico soils are neutral to moderately alkaline in the subsurface and the Goleta and Pico soils have free lime at depths greater than 90 and 60 centimeters. The Rossmoor soils have organic matter that decreases regularly with depth.

GEOGRAPHIC SETTING: The Chenone soils are on nearly level to gently sloping floodplain-steps with slopes of 0 to 2 percent at elevations of 65 to 149 meters (213 to 490 feet). They formed in recent alluvium derived from mixed sources. 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 annual air temperature is 15 to 20 degrees C (59 to 68 degrees F). The frost free period is about 200 to 280 days.

GEOGRAPHICALLY ASSOCIATED SOILS: This is the Soctish series. The Soctish soils are fine-loamy and are adjacent on lower floodplain-steps.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained; low runoff; moderate high saturated hydrologic conductivity; flooding is rare from December to March.

USE AND VEGETATION: Used for livestock grazing, orchards and urban development. Vegetation on uncultivated areas is bristly dogtail, soft brome, blue wildrye and orchardgrass.

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: Humboldt-Del Norte Area, California, 2012.

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

1. Mollic epipedon - the zone from the surface to a depth of 30 centimeters (Ap1 and Ap2 horizons)
2. Particle size control section - the zone from 25 to 100 centimeters, averaging (by weight) 14 percent clay.
3. Fluventic feature: irregular decrease in organic carbon content between a depth of 25 and 125 centimeters (Ab horizon)

ADDITIONAL DATA

This soil was mapped by the Department of Land, Air, and Water Resources, University of California, Davis, in 1975 for the Soil Survey of Hoopa Valley, California.

NSSL, Lincoln Lab sample: 08N0450

User Pedon ID: 08CA605035

Soils classified using Keys to Soil Taxonomy, 12th edition.

National Cooperative Soil Survey
U.S.A.