LOCATION BARBERCREEK CA

Established Series
REV: SAA/KB/ET
07/2016

BARBERCREEK SERIES

The Barbercreek series consists of very deep, well drained soils formed on alluvial fans and fan remnants of alluvial plains. These soils formed in alluvium derived from mixed sources. Slopes range from 0 to 5 percent. The mean annual precipitation is about 1520 millimeters. The mean annual air temperature is about 11 degrees C.

TAXONOMIC CLASS: Fine-silty, mixed, superactive, mesic Dystric Fluventic Eutrudepts

TYPICAL PEDON: Barbercreek silt loam on a 2 percent slope under perennial grasses, clover, and thistle at an elevation of 19 meters. (Colors are for moist soil unless otherwise noted. When described on November 25, 1992, the soil was moist throughout.)

Ap--0 to 23 centimeters; very dark grayish brown (10YR 3/2) silt loam, light brownish gray (10YR 6/2) dry; strong fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; many fine and medium roots; many very fine and fine tubular pores; moderately acid (pH 6.0); gradual wavy boundary.

Bw1--23 to 53 centimeters; very dark grayish brown (10YR 3/2) silty clay loam, light brownish gray (10YR 6/2) dry; moderate fine and medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine and fine roots; many very fine and fine tubular pores; moderately acid (pH 6.0); gradual wavy boundary.

Bw2--53 to 71 centimeters; dark brown (10YR 3/3) silty clay loam, pale brown (10YR 6/3) dry; moderate medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common very fine and fine roots; common very fine and fine tubular pores; moderately acid (pH 6.0); gradual wavy boundary.

C--71 to 152 centimeters; dark grayish brown (2.5Y 4/2) silty clay loam, light brownish gray (2.5Y 6/2) dry; massive; loose, nonsticky and nonplastic; few very fine roots; common very fine irregular pores; slightly acid (pH 6.5); gradual wavy boundary.

TYPE LOCATION: Humboldt County, California; HB&M; Fortuna Quadrangle (7.5 minutes series); WGS84 Decimal degrees 40.5494167 latitude and
-124.1462778 longitude; UTM Zone 10 402941mE, 4489372mN, NAD 83.

RANGE IN CHARACTERISTICS:

Soil Moisture: The soil in the soil moisture control section (between the depths 16 and 48 centimeters) is not dry in all parts for as long as 90 cumulative days in most years. The soils have a udic moisture regime.

Soil Temperature: The mean annual soil temperature is 10 to 13 degrees C. The average summer soil temperature is about 18 degrees C. and the average winter soil temperature is about 9 degrees C. The difference between average summer and winter soil temperatures is about 6 to 9 degrees C.

Particle Size Control Section (weighted average):
Clay content: 18 to 27 percent.

A horizon:
Hue: 10YR, 2.5Y
Value: 3 or 4 moist, 5 or 6 dry
Chroma: 2 or 3 moist, 1 or 2 dry.
Texture of fine earth: loam, silt loam, silty clay loam
Clay content: 18 to 29 percent
Reaction: moderately acid to neutral

Redoximorphic features: fine and medium iron-manganese masses due to compaction
Quantity: none to common
Hue: 10YR
Value: 4 or 5
Chroma: 4 to 6

Bw horizon:
Hue: 2.5Y or 10YR
Value: 3 to 5 moist, 6 or 7 dry
Chroma: 2 moist, 1 or 2 dry
Texture of fine earth: loamy fine sand, fine sandy loam, very fine sandy loam, loam, silt loam, silty clay loam
Clay content: 18 to 29 percent
Reaction: moderately acid to neutral

C horizon:
Hue: 2.5Y
Value: 4 or 5, 6 or 7 dry
Chroma: 2, 1 or 2 dry
Texture of fine earth: coarse sand, loamy fine sand, fine sandy loam, very fine sandy loam, silt loam, silty clay loam
Clay content: 5 to 27 percent
Reaction: moderately acid to neutral

There are Ab horizons in some profiles.

COMPETING SERIES: These are the Jamesfin and Ray series. Jamesfin and Ray soils have a difference between average winter and summer soil temperature of more than 9 degrees C and have a mean January soil temperature below 8 degrees C.

GEOGRAPHIC SETTING: Barbercreek soils are on alluvial fans and fan remnants. Slopes are 0 to 5 percent. These soils formed in mixed alluvium. Elevation is 3 to 50 meters. The climate is humid with cool, foggy summers and cool, rainy winters. Mean annual precipitation is 890 to 2030 millimeters. The mean January temperature is about 8 degrees C. The mean July temperature is about 14 degrees C. The mean annual air temperature is 10 to 13 degrees C. Frost free season is about 275 to 330 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Ferndale, Russ, Loleta and Arlynda soils. Ferndale soils are on high floodplain steps. Russ soils are on natural levees and are coarse-silty. Loleta soils are in the same positions but are poorly drained. The Arlynda soils are on meander scars and depressions, and are very poorly drained.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained; low runoff; moderately slow permeability, moderately high saturated hydraulic conductivity. The soils are rarely flooded for brief periods December through February.

USE AND VEGETATION: These soils are used for pasture, hay, and occasionally truck garden produce. Nearly all areas of this soil have been cleared. The native vegetation is estimated to be a variable canopy of red alder, sitka spruce, and black cottonwood with scattered willow and redwood, with an understory of blackberry, ferns, and grasses.

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 County, California, 2016. Name is from creek near Ferndale, California.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
1. Ochric epipedon - the zone from 0 to 23 centimeters. (Ap horizon)
2. Cambic horizon - the zone from 23 to 71 centimeters. (Bw1 and Bw2 horizons)
3. Eutrudepts feature -base saturation of greater than 60 percent, by ammonium acetate, in the zone from 25 to 100 centimeters
4. Fluventic feature: - irregular decrease in organic-carbon content between a depth of 25 cm to 125 cm below the mineral soil surface
3. Particle-size control section - the zone between 25 and 100 centimeters averages 27 percent clay and 66 percent silt by field estimate. (Bw1, Bw2, C.)

ADDITIONAL DATA:NASIS User Pedon ID: 92ca600770
12 edition

National Cooperative Soil Survey
U.S.A.