LOCATION NEWPARK CA
Established Series
WRR/KP
04/2015
NEWPARK SERIES
The Newpark series consists of very deep, moderately well drained soils that formed in alluvium from mixed rock sources. Newpark soils are on alluvial fans. Slopes range from 0 to 2 percent. The mean annual precipitation is about 13 inches, and the mean annual temperature is about 60 degrees F.
TAXONOMIC CLASS: Fine-silty, mixed, superactive, thermic Calcic Pachic Haploxerolls
TYPICAL PEDON: Newpark silty clay loam, 0 to 2 percent slopes, on a west facing 1 percent slope in a disked field at an elevation of 165 feet, (50 meters). When described the soil was slightly moist below 8 inches. (Colors are for dry soil unless otherwise noted).
Ap--0 to 8 inches, (0 to 20 cm); grayish brown (10YR 5/2) broken face silty clay loam, very dark brown (10YR 2/2) broken face moist; 30 percent clay; moderate medium subangular blocky structure; moderately hard, friable, very sticky, moderately plastic; few very fine roots; common fine tubular pores; neutral, pH 6.9 by pH meter 1:1 water; abrupt smooth boundary. (0 to 20 centimeters thick)
A1--8 to 18 inches, (20 to 45 cm); grayish brown (10YR 5/2) broken face silty clay loam, very dark brown (10YR 2/2) broken face moist; 32 percent clay; strong medium subangular blocky structure; moderately hard, friable, very sticky, moderately plastic; common fine tubular pores; neutral, pH 7.3 by pH meter 1:1 water; clear smooth boundary. (16 to 35 centimeters thick)
A2--18 to 27 inches, (45 to 68 cm); dark grayish brown (10YR 4/2) broken face silty clay loam, very dark brown (10YR 2/2) broken face moist; 32 percent clay; strong medium subangular blocky structure; moderately hard, friable, very sticky, moderately plastic; common fine tubular and common very fine tubular pores; slightly alkaline, pH 7.6 by pH meter 1:1 water; abrupt smooth boundary. (10 to 50 centimeters thick)
Ck1--27 to 36 inches, (68 to 91 cm); pale brown (10YR 6/3) broken face silty clay loam, brown (10YR 4/3) broken face moist; 28 percent clay; moderate medium subangular blocky structure; moderately hard, friable, very sticky, moderately plastic; common very fine tubular pores; strong effervescence; slightly alkaline, pH 7.8 by pH meter 1:1 water; abrupt smooth boundary. (23 to 56 centimeters thick)
Ck2--36 to 52 inches, (91 to 132 cm); pale brown (10YR 6/3) broken face silty clay loam, brown (10YR 4/3) broken face moist; 28 percent clay; moderate medium subangular blocky structure; slightly hard, friable, very sticky, moderately plastic; common very fine tubular pores; 5 percent fine carbonate masses; strong effervescence; slightly alkaline, pH 7.8 by pH meter 1:1 water; abrupt smoothboundary. (20 to 41 centimeters thick)
C1--52 to 63 inches, (132 to 160 cm); pale brown (10YR 6/3) broken face fine sandy loam, brown (10YR 4/3) broken face moist; 15 percent clay; weak medium subangular blocky structure; slightly hard, very friable, slightly sticky, slightly plastic; common very fine tubular pores; 5 percent fine carbonate masses; slight effervescence; moderately alkaline, pH 7.9 by pH meter 1:1 water; abrupt smooth boundary. (0 to 28 centimeters thick)
C2--63 to 79 inches, (160 to 200 cm); pale brown (10YR 6/3) broken face very fine sandy loam, brown (10YR 4/3) broken face moist; 16 percent clay; weak medium subangular blocky structure; moderately hard, friable, slightly sticky, slightly plastic; common very fine tubular pores; 30 percent dark yellowish brown (10YR 4/4), moist, and light yellowish brown (10YR 6/4), dry, masses of oxidized iron; 5 percent fine carbonate masses; slight effervescence; slightly alkaline, pH 7.8 by pH meter 1:1 water;
TYPE LOCATION: Santa Clara County, California, City of San Jose, Lester Park Property on Chynoweth Road, 200 meters north of Chynoweth Road and 100 meters west of farm buildings., in an unsectionized area of Township 8s, Range 1e, 4124478 UTM Northing, 0603280 UTM Easting UTM Zone 10, NAD83 - U.S.G.S Quad: San Jose East, California.
RANGE IN CHARACTERISTICS: Depth to free carbonates and calcareous matrix is 50 to 95 cm. The mean annual soil temperature is 60 to 62 degrees F. The particle size control section averages 27 to 35 percent clay, and 0 to 5 percent rock fragments. Mineralogy is mixed. Organic matter ranges from 1 to 3 percent to a depth of 8 inches. Historic over drafting of the groundwater of the Santa Clara valley has drained Newpark soils of water in the lower soil profile, and the soils are considered partially drained today. Historically, Newpark soils were saline in the natural state but decades of irrigation and lowering of water tables has reclaimed these soils, electrical conductivity now ranges from 1 to 3 ms/g.
The A horizons dry color is 10YR 5/2, 4/2, 4/1, 3/2 or 3/1. Moist color is 10YR 3/2, 2/2 or 2/1. Texture is loam, clay loam or silty clay loam. Clay content ranges from 27 to 35 percent. Rock fragments range from 0 to 5 percent gravel. Reaction ranges from 6.6 to 7.8.
The Ck horizons dry color is 10YR 7/4, 7/3, 6/3, 2.5Y 7/1, 6/3 or 5/2. Moist color is 10YR 5/4, 4/4, 4/3, 2.5Y 5/3, 5/2, 4/2. Texture is clay loam or silty clay loam. Clay content ranges from 27 to 35 percent. Rock fragments range from 0 to 5 percent gravel. Reaction ranges from 7.8 to 8.4. Carbonate soft masses occur throughout the horizon and effervescence ranges from slight to violent.
The C horizons dry color is 10YR 8/4, 6/4, 6/3, 2.5Y 7/3 or 6/3. Moist color is 10YR 5/4, 4/4, 4/3, 2.5Y 5/2, 4/3. Texture is fine sandy loam, very fine sandy loam, sandy clay loam and silty clay loam. Clay content ranges from 15 to
30 percent. Rock fragments range from 0 to 5 percent gravel. Reaction ranges from 7.8 to 8.4.
COMPETING SERIES: These are the
Colpien,
Flamen,
Linne,
Pleito and
San Benito series. Colpien soils have a soil temperature higher than 62 degrees F and depth to free carbonates is less than 9 inches (24 centimeters). Flamen soils have a duripan below 100 centimeters. Linne and San Benito soils are moderately deep. Pleito soils have more than 15 percent gravel in the control section.
GEOGRAPHIC SETTING: Newpark soils are on alluvial fans. Slopes are 0 to 2 percent. These soils formed in alluvium weathered from mixed rock sources. Elevation is 20 to 165 feet. Mean annual precipitation is 14 to 23 inches. The mean annual temperature is 60 to 62 degrees F. Frost free season is 275 to 325 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Elpaloalto(T) and
Hangerone(T) soils. The Elpaloalto(T) soils are fine-silty and lack carbonates. The Hangerone(T) soils are in basins and have fine textural control sections.
DRAINAGE AND PERMEABILITY: Well drained; low runoff; moderately slow permeability.
USE AND VEGETATION: This soil is used for urban and recreation. Vegetation is lawn grasses and ornamental plants. Native vegetation was salt tolerant plants and scattered oaks.
DISTRIBUTION AND EXTENT: The soils are not extensive and are mapped in the Santa Clara valley, Major Land Resource Area: 14 -- Central California Coastal Valleys.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: Santa Clara County, California 2009. Source of name from land donated for large new urban park.
REMARKS: Particle Size Control Section for this pedon: 25 to 100 cm)
Diagnostic feature recognized in this pedon is:
Calcic horizon: 27 to 52 inches (68 to 132 cm)
The soil moisture control section is dry in all parts from about May 1 to November 1 (about 180 days).
ADDITIONAL DATA: NASIS Site and Pedon number: 06ca085641361
National Cooperative Soil Survey
U.S.A.