LOCATION RINDGE                  CA

Established Series
Rev. PGN-WBS-MAM-ET
05/2016

RINDGE SERIES

The Rindge series consists of very deep, very poorly drained organic soils that formed in fresh water marshes, sloughs and drainage channels from mixed decomposed reeds, tules and alluvium. Slope is 0 to 2 percent. The annual precipitation is about 301 millimeters (15 inches) and the annual temperature is about 14 degrees C (58 degrees F).

TAXONOMIC CLASS: Euic, thermic Typic Haplosaprists

TYPICAL PEDON: Rindge muck - on an east facing slope of less than 1 percent in a cultivated corn field at 3.3 meters (11 feet) below sea level. (Colors are for moist soil unless otherwise noted.)

Oap--0 to 33 centimeters (0 to 13 inches); black (10YR 2/1) muck, black (10YR 2/1) rubbed, very dark gray (10YR 3/1) dry; less than 5 percent tule and reed fibers, none observable rubbed; moderate very fine, fine and medium granular structure; slightly hard, slightly sticky and slightly plastic; slightly acid (pH 6.2 in 0.01 M calcium chloride); abrupt smooth boundary. (20 to 56 centimeters (8 to 22 inches) thick)

Oa1--33 to 91 centimeters (13 to 36 inches); black (10YR 2/1) mucky peat, variegated yellowish brown (10YR 5/4), black (10YR 2/1) rubbed, very dark brown (10YR 2/2) dry; 35 percent tule and reed fibers, less than 5 percent rubbed; massive; soft; moderately acid (pH 5.8 in 0.01 M calcium chloride); clear smooth boundary. (41 to 71 centimeters (16 to 28 inches) thick)

Oa2--91 to 152 centimeters (36 to 60 inches); very dark brown (10YR 2/2) mucky peat, variegated yellowish brown (10YR 5/4), black (10YR 2/1) rubbed, very dark gray (10YR 3/1) dry; 45 percent tule and reed fibers; less than 10 percent fibers rubbed; massive; soft; slightly acid (pH 6.2 in 0.01 M calcium chloride). (61 to 122 centimeters (24 to 48 inches) thick)

TYPE LOCATION: San Joaquin County, California; in the northwest portion of the Rindge Tract about 3,200 feet southwest of pumping station near the west boundary of R 5 E or 38 degrees, 2 minutes, 08 seconds north Latitude, 121 degrees, 28 minutes, 33 seconds west Longitude (in an unsectionized area) Terminous Quadrangle.

RANGE IN CHARACTERISTICS:
Soil temperature: 15.5 degrees C (60 degrees F)

Control section -

Organic matter: The organic materials are mostly tule and reed fibers
Fibers: less than 5 percent before rubbing in the upper centimeters 30 centimeters (12 inches) and increases to as much as 80 percent at a depth of 130 centimeters (51 inches)
Reaction: 4.5 to 7.3 in 0.01 M calcium chloride (in undried samples)
Other features: Some pedons have lenses of moderately decomposed material below 13 inches, but total less than 25 centimeters (10 inches) in thickness

Oap, and Oa1 horizon(s)
Hue: 10YR or N moist; 10YR, 7.5YR or N dry
Value: 2 or 4 moist; 2, 3 or 4 dry
Chroma: 0, 1, or 2 dry and moist
Organic matter: 10 to 55 percent (sapric)
Fibers: unrubbed individual fibers have 10YR or 7.5YR 5/4 colors
Textures of the fine earth: sandy loam, loam, silt loam, or clay loam with mucky modifiers or muck

Oa2 horizon:
Hue: 10YR or N moist and dry
Value: 2, 3 or 5 moist; 2, 3 or N dry
Chroma: 0, 1, or 2 dry and moist
Organic matter: 25 to 65 percent
Fibers: unrubbed individual fibers have 10YR or 7.5YR 5/4 colors
In Liu of textures: mucky peat or peat

COMPETING SERIES: These are the Hobonny, Joice and Longshoal. The Hobonny soils have moist control sections during the summer months when drained. Joice soils have an electrical conductivity that ranges from 15 to 48 decisiemens per meter at 25 degrees C. Longshoal soils are strongly saline and electrical conductivity is more than 16 decisiemens per meter and the Sodium Adsorption Ratio (SAR) is more than 13.

GEOGRAPHIC SETTING: Rindge soils are in fresh water marshes, sloughs, river channels and deltas. Slopes are less than 2 percent. The soils formed from hydrophytic plant remains and mixed mineral alluvium. The organic part is from reeds and tules and the mineral part is clayey. Elevations are 1.5 meters (5 feet above) to 6 meters (20 feet) below sea level. When below sea level, commonly they are islands protected by levees. The climate is subhumid with warm dry summers and cool moist winters. The mean annual precipitation is 305 to 508 millimeters (12 to 20 inches). Mean January temperature is about 7 degrees C (45 degrees F); the mean July temperature is about 24 degrees C (75 degrees F); the mean annual temperature is about 14 to 16 degrees C (57 to 60 degrees F). Frost-free season ranges from 250 to 310 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the similar Kingile and Venice soils and the Gazwell, Peltier, Ryde and Webile soils in other families. Peltier and Ryde are mineral soils with 10 to 30 percent organic matter in the control section. Gazwell soils are mineral soils with buried organic layers below 71 to 99 centimeters (28 to 39 inches). Webile soils are organic and have continuous fine textured mineral soils at depths of 91 to 130 centimeters (36 to 51 inches). Kingile soils have continuous clayey mineral layers between depths of 41 to 91 centimeters (16 and 36 inches). Venice soils have a fiber content after rubbing of one sixth (16 percent) or more of the soil volume.

DRAINAGE AND PERMEABILITY: Very poorly drained; very slow runoff; rapid permeability. In the Delta area, the water table is lowered by artificial drainage with open drains and pumps. The water is usually at a depth of 91 centimeters (36 inches) during the growing season and at or near the surface at some time during the winter. Areas along the coast are not drained and the water table is near the surface at all times.

USE AND VEGETATION: The Rindge soils are used for cropland to grow such crops as asparagus, potatoes, tomatoes, corn, wheat and barley. In some harvested areas, inundated fields are used for waterfowl hunting. Near the coast the soil is idle or used for pasture.

DISTRIBUTION AND EXTENT: Rindge soils are in the islands of the Sacramento - San Joaquin Delta and along the central coast of California. The series is of moderate extent in MLRA-16, 14.

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

SERIES ESTABLISHED: Monterey County, California, 1972.

REMARKS: The classification was updated in February 2001 using the Eighth Edition to Soil Taxonomy. This series was formerly classified as euic, thermic Typic Medisaprists. Competing series were checked in 2016 -- ET.

Diagnostic horizons and features recognized in this pedon are:

Sapric organic soil material - 0 to 152 centimeters (0 to 60 inches) (Oap, Oa1, Oa2).

ADDITIONAL DATA: This pedon was sampled as S72CA-39-8-(1-6).

---

National Cooperative Soil Survey
U.S.A.