LOCATION RINDGE CAEstablished Series
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 11 feet below sea level. (Colors are for moist soil unless otherwise noted.)
Oap--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. (8 to 22 inches thick)
Oa1--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. (16 to 28 inches thick)
Oa2--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). (24 to 48 inches thick)
TYPE LOCATION: San Joaquin County, California; in the NW portion of the Rindge Tract about 3,200 feet SW of pumping station near the west boundary of R 5 E or 38 degrees, 2 min., 08 seconds north Latitude, 121 degrees, 28 minutes, 33 seconds west Longitude (in an unsectionized area) Terminous Quadrangle.
RANGE IN CHARACTERISTICS: Some pedons have lenses of moderately decomposed material below 13 inches, but total less than 10 inches in thickness. The fiber content is less than 5 percent before rubbing in the upper 12 inches and increases to as much as 80 percent at a depth of 51 inches. Rubbed fibers are less than 2 percent in the upper 12 inches and increase to 10 to 15 percent at a depth of 51 inches. The organic materials are mostly tule and reed fibers. Soil reaction in undried samples ranges from pH 4.5 to 7.3 in 0.01 M calcium chloride. The mean annual soil temperature at 20 inches is 60 degrees F. The soils, after draining, are dry to a depth of several feet during the summer months unless irrigated.
The Oap, and Oa1 layers are 10YR 2/1, 2/2, 3/1, 4/1; 7.5YR 2/2 or N 2/0 dry. Unrubbed individual fibers have 10YR or 7.5YR 5/4 colors. Moist colors are 10YR 2/1, 4/1; N 2/0. It has 10 to 55 percent organic matter and is muck, mucky sandy loam, mucky loam, mucky silt loam, or mucky clay loam.
The Oa2 layer is 10YR 3/1, 2/1, 2/2; or N 2/0 dry. Unrubbed individual fibers have 10YR or 7.5YR 5/4 colors. Moist colors are 10YR 2/1, 2/2, 3/1, 3/2, 5/2; N 2/0. It has 25 to 65 percent organic matter and is mucky peat or peat.
COMPETING SERIES: These are the Hobonny, Lafitte, Maurepas and Timbalier series. Hobonny, Lafitte and Timbalier soils have moist control sections during the summer months when drained. Maurepas soils have woody fiber organic material.
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 5 feet above to 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 12 to 20 inches. Mean January temperature is about 45 degrees F; the mean July temperature is about 75 degrees F; the mean annual temperature is about 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 soil 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 28 to 39 inches. Webile soils are organic and have continuous fine textured mineral soils at depths of 36 to 5l inches. Kingile soils have continuous clayey mineral layers between depths of 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 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 OFFICE 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 not checked at that time.
Diagnostic horizons and features recognized in this pedon are:
Sapric organic soil material - 0 to 60 inches (Oap, Oa1, Oa2).
ADDITIONAL DATA: This pedon was sampled as S72CA-39-8-(1-6).