LOCATION ARBUCKLE                CA

Established Series
RD. GMK/LCL/RWK/MAV/WRR/SBS/KP/DWB/AEC
03/2018

ARBUCKLE SERIES

The Arbuckle series consists of very deep, well drained soils that formed in alluvium from sedimentary and metamorphic rocks. Arbuckle soils are on low terraces, and have slopes of 0 to 75 percent. The mean annual precipitation is about 508 millimeters (20 inches) and the mean annual air temperature is about 16 degrees C (61 degrees F).

TAXONOMIC CLASS: Fine-loamy, mixed, superactive, thermic Typic Haploxeralfs

TYPICAL PEDON: Arbuckle sandy loam under annual grasses and forbs, when described on September 15, 1992 the soil was dry to 86 centimeters (34 inches) and slightly moist below. (Colors are for dry soil unless otherwise noted).

A1--0 to 13 centimeters (0 to 4 inches); light yellowish brown (10YR 6/4) sandy loam, dark yellowish brown (10YR 4/4) moist; moderate medium subangular blocky parting to moderate medium granular structure; slightly hard, very friable, slightly sticky and nonplastic; many very fine roots; many very fine interstitial and few very fine tubular pores; gravel content 10 percent; slightly acid (pH 6.2); abrupt smooth boundary.

A2--13 to 25 centimeters (4 to 10 inches); light yellowish brown (10YR 6/4) sandy loam, dark yellowish brown (10YR 4/4) moist; moderate medium angular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common very fine roots; common very fine interstitial and few very fine tubular pores; gravel content 10 percent; slightly acid (pH 6.2); clear smooth boundary.

A3--25 to 43 centimeters (10 to 17 inches); light yellowish brown (10YR 6/4) sandy loam, dark yellowish brown (10YR 4/4) moist; moderate medium angular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; few very fine roots; common very fine interstitial and few very fine tubular pores; gravel content 10 percent; slightly acid (pH 6.1); clear smooth boundary.

Bt1--43 to 66 centimeters (17 to 26 inches); yellowish brown (10YR 5/4) gravelly sandy loam, dark yellowish brown (10YR 3/4) moist; moderate medium angular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; few very fine roots; common very fine tubular pores; common thin clay films on ped faces; 25 percent gravel; slightly acid (pH 6.2); clear smooth boundary.

Bt2--66 to 86 centimeters (26 to 34 inches); yellowish brown (10YR 5/4) gravelly sandy clay loam, dark yellowish brown (10YR 3/4) moist; moderate fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; few very fine roots; common very fine tubular pores; few thin clay films on ped faces; 30 percent gravel; slightly acid (pH 6.3); clear smooth boundary.

Btk--86 to 112 centimeters (34 to 44 inches); yellowish brown (10YR 5/4) gravelly loam, dark yellowish brown (10YR 4/4) moist; moderate fine subangular blocky structure; slightly hard, firm, sticky and slightly plastic; few very fine roots; common very fine tubular pores; many thin clay films on ped faces; 30 percent gravel with calcium carbonate pendants on lower side of gravels; slightly acid (pH 6.3); clear smooth boundary.

BCk--112 to 173 centimeters (44 to 68 inches); yellowish brown (10YR 5/4) very gravelly sandy clay loam, dark yellowish brown (10YR 4/4) moist; massive; loose, loose, non sticky and non plastic; many very fine interstitial pores; 50 percent gravel with calcium carbonate pendants on lower side of gravels; slightly acid (pH 6.5).

TYPE LOCATION: Colusa County, California; about 6 miles west of Arbuckle CA; 2100 feet west and 1200 feet north of the SE corner of section 35 T.13 N, R.3 W, MDB&M; 39 degrees, 00 minutes, 55 seconds north latitude and 122 degrees, 09 minutes, 32 seconds west longitude; USGS Cortina Creek CA Quadrangle.

RANGE IN CHARACTERISTICS:

Soil Temperature - The mean annual soil temperature is 16 to 18 degrees C (60 to 65 degrees F) and the soil temperature is above 8 degrees C (47 degrees F) all year.

Soil Moisture - The soil between the depths of 20 to 66 centimeters (8 to 26 inches) is dry in all parts from May 15 to October 31 and moist in some or all parts from November 1 to May 15.

Organic matter - Assumed to be less than 1 percent from data from similar soils on similar geomorphic positions.

Solum thickness: more than 100 centimeters (40 inches)

Particle-size control section - 43 to 93 cm (17 to 37 inches); Clay content weighted average 18 to 32 percent, gravel content weighted average 3 to 35 percent.

The A horizon - Hue: 10YR
Value dry: 5,6
Value moist: 3,4,2
Chroma dry: 2,3,4
Chroma moist: 2,3,4,1
Additional Hue 7.5YR
Value dry: 5,6
Value moist: 4,5,6
Chroma dry: 3,4
Chroma moist: 4
Texture: sandy loam, fine sandy loam, loam or their gravelly equivalents
Coarse fragments: 3 to 34 percent
Reaction: slightly acid to neutral

The Bt and Btk horizon - Hue: 10YR
Value dry: 5,6,7
Value moist: 3,4
Chroma dry: 3,4
Chroma moist: 3,4,2

Additional Hue 7.5YR, 5YR
Value dry: 5,6,7
Value moist: 3,4,5
Chroma dry: 4,6
Chroma moist:3,4

Texture: loam, sandy loam, fine sandy loam, sandy clay loam, clay loam and gravelly equivalents.
Coarse fragments: 3 to 34 percent gravel
Clay content: 18 to 32 percent with less than 20 percent coarse and very coarse sand
Reaction: slightly acid to slightly alkaline

The BCk horizon - Hue: 10YR; 7.5YR
Value dry: 5,6, 7
Value moist: 5,4,3
Chroma dry: 4,3
Chroma moist: 4,3
Texture: very gravelly sandy clay loam, very gravelly loam, very gravelly sandy loam or very gravelly loamy sand
Reaction is moderately acid to moderately alkaline.
Coarse fragments: 35 to 80 percent gravel

COMPETING SERIES: These are Accelerator, Blasingame, Boga, Borden, Bressa, Creviscreek, Esparto, Fallbrook, Loemstone, Montpellier, Nodhill, Pomo, Ramona, Sesame, Snelling, Tivy, Wasioja and Wyman series. Accelerator is over 100 centimeters (40 inches) to paralithic contact, has pHs below 7.8, and is non-effervescent. Blasingame has pHs below 7.8, are non-effervescent and have 5YR hues. Boga soils have a 2Cd horizon and redoximorphic features in the lower Bt and 2Cd horizons. Borden is over 100 centimeters (40 inches) to paralithic contact, has pHs below 7.8, is slightly effervescent and has slopes of less than 5 percent. Bressa has pHs below 7.8, is not effervescent in the surface, has hues to 5YR. and has slopes steeper than 30 percent. Creviscreek is moderately well drained and has pHs below 7.3. Esparto has a lithic contact below 100 centimeters (40 inches), has pHs below 7.3 is non-effervescent and has slopes below 5 percent. Fallbrook has a paralithic contact below 102 centimeters (40 inches) and has 5YR hues in the subsoil. Loemstone soils have a paralithic contact at 100 to 150 centimeters (40 to 60 inches). Montpellier, Ramona and Wyman are deeper than 1520 centimeters (60 inches), have pHs below 7.3 and are non-effervescent with 5YR hues in the B horizon. Nodhill has dense unconsolidated sediments at 50 to 100 centimeters (20 to 40 inches) and a Btk horizon which is violently effervescent. Pomo has a lithic contact below 50 centimeters (40 inches), pHs below 7.2 and is non-effervescent, with slopes as steep as 50 percent. Seasame has weathered parent rock (Granite), pHs below 7.3 and is non-effervescent, with slopes steeper than 30 percent. Snelling is deeper than 150 centimeters (60 inches), has pHs below 7.8, is non-effervescent, and has coarser surface textures with less than 20 percent clay content. Tivy is deeper than 150 centimeters (60 inches), has pHs below 7.3 and is non-effervescent, with chromas below 3. Wasioja is deeper than 150 centimeters (60 inches), is non-effervescent and has less than 20 percent clay in parts of the A horizon.

GEOGRAPHIC SETTING: Arbuckle soils are on low terraces at elevations of 9 to 610 meters ( 30 to 2,000 feet) and have slopes of 0 to 75 percent. The parent material is alluvium derived from sedimentary and metamorphic rocks. Rock fragments are dominantly quartz and chert.. The climate is dry subhumid mesothermal with hot dry summers and cool moist winters. Mean annual precipitation is 25 to 89 centimeters (10 to 35 inches). Mean annual air temperature is 14 to 18 degrees C (57 to 64 degrees F.), average January temperature about 7 degrees C (45 degrees F.), and average July temperature about 28 degrees C (83 degrees F.) Frost-free season ranges from 152 to 280 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Esparto soils and the Garretson, Haire, Hillgate, Tehama, Wyo, Yolo and Zamora soils. Garretson and Yolo soils lack Bt horizons. Haire and Hillgate soils have Bt horizons with more than 35 percent clay. Tehama soils have fine-silty textural control sections with 11 to 15 percent fine sand and coarser. Wyo and Zamora soils have Bt horizons with moist values of less than 4.

DRAINAGE AND PERMEABILITY: Well drained; negligible to high runoff; moderately slow to slow permeability.

USE AND VEGETATION: Used for dryland and irrigated orchards, irrigated row and field crops, dryfarmed grain, and for range. Natural vegetation is annual grasses and forbs, either alone or as an understory with blue oaks in stands ranging from open to dense.

DISTRIBUTION AND EXTENT: Along the west side of the Sacramento Valley and the intermountain valleys of the Coast Range and valleys of Southern California. The series is extensive. MLRA 17, 14, 15, 19, 20.

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

SERIES ESTABLISHED: Woodland Area, California, 1909.

REMARKS:

Ochric epipedon: A1, A2, A3 horizons

Argillic horizon: 43 to 112 centimeters (17 to 44 inches): Bt1, Bt2, Btk

Edit log: 04/2003 Proposed edits for use in Butte County. Range in Characteristics; in the A horizon added value moist 2 and chroma moist 1; in the Bt chroma moist 2, and in additional hue value moist 5; to the BC horizon added range for coarse fragments 45 to 80 percent gravel.


2014 edits from SDJR projects-AEC

ADDITIONAL DATA: Numerous pedons analyzed by UC-Davis. NSSL pedon S73CA-079-002

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National Cooperative Soil Survey
U.S.A.