LOCATION VINA                    CA

Established Series
Rev. SBJ/WCL/DJE/MAV/SBS/AEC
03/2018

VINA SERIES

The Vina series consists of very deep, well drained soils on Pleistocene alluvial fans. Slopes are 0 to 8 percent. Mean annual precipitation is about 23 (583 mm) inches and the mean annual temperature is about 61 degrees F (16 degrees C).

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

TYPICAL PEDON: Vina loam - open idle land with a slope of 1 percent under a cover of annual grasses and forbs at 200 feet elevation. (Colors are for dry soil unless otherwise stated).

A1--0 to 11 inches (0 to 28 cm); dark grayish brown (10YR 4/2) loam; very dark grayish brown (10YR 3/2) moist; moderate medium and fine granular structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine roots; common very fine and fine tubular pores; neutral (pH 7.0); clear smooth boundary. (10 to 18 inches thick)

A2--11 to 36 inches (28 to 91 cm); dark grayish brown (10YR 4/2) loam, very dark grayish brown (10YR 3/2) moist; moderate medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; few very fine roots, common very fine and fine tubular pores; neutral (pH 6.8); clear smooth boundary. (20 to 30 inches thick)

C--36 to 66 inches (91 to 168 cm); grayish brown (10YR 5/2) fine sandy loam, dark grayish brown (10YR 4/2) moist; massive; slightly hard, very friable, nonsticky and nonplastic; few very fine tubular pores; neutral (pH 7.3).

TYPE LOCATION: Tehama County, California; about five tenths of a mile south of the town of Vina between the railroad and county road. It is 1200 feet west and 500 feet south of the NE corner of sec. 23, T. 24 N., R. 2 W. 39 degrees 55 minutes 33.5 seconds North 122 degrees 3 minutes 4.5 seconds West

RANGE IN CHARACTERISTICS: The mean annual soil temperature varies from 61 to 63 degrees F (16 to 17 degrees C). The soil moisture control section between depths of 8 to 25 inches (20 to 64 cm) is dry in all parts from June 1 to November 1 (120 days). The particle-size control section (10 to 40 inches, 25 to 102 cm) averages 12 to 18 percent clay and 15 to 25 percent fine sand or coarser material. Reaction is slightly acid or slightly alkaline. Organic carbon decreases regularly to 50 inches or more and remains higher than .3 percent. The mollic epipedon ranges from 20 to 48 inches in thickness.

The A horizon is 10YR 5/2, 4/3, 5/3 and 4/2. Moist color is 10YR 3/2 or 3/3. Surface textural phases mapped are fine sandy loamand loam.

The C horizon is 10YR 4/3, 5/2, 5/3 or 6/3. Moist colors are 10YR 3/3, 4/3 and 4/2. It is loam, sandy loam, fine sandy loam, loamy coarse sand, loamy sand or coarse sand.

COMPETING SERIES: These are the Ignord and Sheridan soils. Ignord soils have carbonates throughout. Sheridan soils are moderately deep over weathered granite.

GEOGRAPHIC SETTING: Vina soils are on Pleistocene alluvial fans. Slopes are 0 to 8 percent and elevations range from 141 to 1,207 feet (43 to 368 m). The soils developed in alluvium predominantly derived from volcanic rocks. The climate is Mediterranean with hot dry summers and cool moist winters. Mean annual precipitation is 23 to 33 inches (580 to 830 mm). Mean annual temperature is 60 to 62 degrees F (15.5 to 16.7 degrees C). The frost-free period is 225 to 280 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are Capay, Keefers, Los Robles, Toomes and Tuscan soils. Capay soils are clayey throughout. Keefer soils have a clayey subsoil. Los Robles soils are on alluvial plains and have a clay loam subsoil. Toomes soils are underlain at shallow depths by volcanic breccia. Tuscan soils have an indurated hardpan.

DRAINAGE AND PERMEABILITY: Well drained; negligible to medium runoff; moderate permeability.

USE AND VEGETATION: Used for irrigated row crops, orchards, hay and pasture. Vegetation is valley oaks, cottonwoods, annual and perennial grasses.

DISTRIBUTION AND EXTENT: Northeastern Sacramento Valley California. The series is moderately extensive in MLRA-17.

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

SERIES ESTABLISHED: Red Bluff Area, California, 1909.

REMARKS:
10/2006 changed runoff terminology- DWB
5/25/2005 Competing section updated as part of Butte County Soil Survey (CA612) final correlation conference. Use of Vina in Butte County is limited only to alluvial fans, not alluvial fans and floodplains that the series concept presently allows. -SS

Undated remarks: Laboratory data by University of California, Davis. (Change in classification is coarse-loamy family instead of fine-loamy). Soils previously mapped as fine-loamy would now be a different series. The concept of this soil is limited to the fine end of the coarse-loamy family. The Molinos series if mapped will be the coarser counterpart containing more than 25 percent fine sand or coarser. The Molinos series is presently inactivated. The Vina now borders the fine-loamy and coarse-silty families.
Updates from SDJR projects not including taxadjuncts that are fine-loamy or Cumulic subgroups that occur on Holocene flood plains. - AEC

Diagnostic horizons and features recognized in this pedon are:

Mollic epipedon - the zone from the surface to a depth of 36 inches (0 to 91 cm) (A1,A2).

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National Cooperative Soil Survey
U.S.A.