LOCATION COACHELLA               CA

Established Series
Rev. AAK-LAB-GMK
04/2015

COACHELLA SERIES

The Coachella series are well-drained, moderately rapidly permeable soils in lacustrine basins the sediments are from dominantly igneous rocks. Slopes are gently sloping to nearly level. Mean annual precipitation is 2 to 4 inches average annual temperature of about 72 degrees F.

TAXONOMIC CLASS: Sandy, mixed, hyperthermic Typic Torrifluvents

TYPICAL PEDON: Coachella fine sand - uncultivated, sparse brush. (Colors are for dry soil unless otherwise noted.)

C1--0 to 11 inches; light olive gray (5Y 6/2) fine sand, olive gray (5Y 5/2) moist; single grain; loose; few very fine roots; many very fine interstitial pores; moderately alkaline (pH 8.0); clear smooth boundary. (6 to 12 inches thick)

C2--11 to 26 inches; light olive gray (5Y 6/2) fine sand, olive gray (5Y 5/2) moist; single grain; loose; few very fine roots; many silt lenses from 1/8 to 1/2 inches thick, olive gray (5Y 5/2) and olive (5Y 4/3) moist with many fine roots between silt plates; slightly effervescent; moderately alkaline (pH 8.2); clear wavy boundary. (8 to 20 inches thick)

C3--26 to 41 inches; light olive gray (5Y 6/2) fine sand, olive gray (5Y 4/2) moist; single grain; loose; few very fine roots; many fine interstitial pores; silt lenses from 1/4 to 1/2 inches thick, olive (5Y 5/3) and olive gray (5Y 4/2) moist with many fine roots; slightly effervescent; moderately alkaline (pH 8.2); clear smooth boundary. (8 to 16 inches thick)

C4--41 to 48 inches; light olive gray (5Y 6/2) fine sand, olive gray (5Y 4/2) moist; single grain; loose; few very fine roots; many fine interstitial pores; slightly effervescent; moderately alkaline (pH 8.2); clear smooth boundary. (4 to 10 inches thick)

C5--48 to 60 inches; light olive gray (5Y 6/2) very fine sand, olive gray (5Y 4/2) moist; massive; slightly hard, very friable; silt lenses of 1/4 and 1/2 inches thick, pale yellow (5Y 7/3) and pale olive (5Y 6/3) moist; slightly effervescent; moderately alkaline (pH 8.2).

TYPE LOCATION: Riverside County, California, about 2 miles east-southeast of Cathedral City, California; approximately 520 feet south of the north quarter corner of sec. 2, T. 5 S., R. 5 E., SBBM

RANGE IN CHARACTERISTICS: The mean annual soil temperature at a depth of 20 inches is 72 to 77 degrees F. The soil is slightly to strongly effervescent and the lime is disseminated. The organic matter is less than 0.75 percent and decreases irregularly with depth.

The Coachella soils are light olive gray fine sand and very fine sand with thin strata of silt loam or very fine sandy loam to a depth of 60 inches.

The profile has hue of 2.5Y or 5Y, value of 5 through 7, and chroma of 2 or 3. The 10- to 40-inch control section is sand, fine sand, loamy sand, or loamy fine sand with thin strata (1/8 to 3/4 inches thick) of silt loam or very fine sandy loam.

COMPETING SERIES: These are the Acolita, Antho, Brios, Gilman, Myoma, Rositas, Valencia and Vint series. Acolita soils have numerous lime concretions and organic matter that decreases regularly with depth. Antho, Gilman, and Valencia soils have coarse-loamy control sections. Brios, Rositas, and Vint soils have hue of 7.5YR or 10YR. Myoma soils have a regular decrease in organic matter with depth.

GEOGRAPHIC SETTING: The Coachella soils are gently sloping to nearly level and are in lacustrine basins at elevations of 800 feet above sea level to 230 feet below sea level. The sediments are from dominantly igneous rocks. The climate is arid with an annual precipitation of 2 to 4 inches that occurs as gently winter rains or as erratic high intensity summer storms. The average January temperature is about 53 degrees F, average July temperature is about 92 degrees F and an average annual temperature of about 72 degrees F. The frost-free season is 260 to 320 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Gilman and Myoma soils and the Salton and Indio soils. Glenbar soils have a fine-silty control section and Indio soils have a coarse-silty control section.

DRAINAGE AND PERMEABILITY: Well-drained; but perched water tables are common where the soil is irrigated; slow runoff; moderately rapid permeability.

USE AND VEGETATION: Irrigated areas are in citrus, grapes, and vegetables. Uncultivated areas have a sparse cover of desert shrubs and weeds.

DISTRIBUTION AND EXTENT: Lacustrine basins in the desert of Southern California, principally Coachella Valley. They are moderately extensive.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: PHOENIX, ARIZONA

SERIES ESTABLISHED: Riverside County (Coachella Valley Area), California, 1923.

REMARKS:

Responsibility for this series was transferred from Davis to Phoenix 4/2015. Last revised by the state on 4/74.

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National Cooperative Soil Survey
U.S.A.