LOCATION LANDELSPARK CAEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, thermic Fluventic Haploxerolls
TYPICAL PEDON: Landelspark sandy loam, on a west facing 2 percent slope under a cover of wood chips and shrubs at an elevation of 100 feet. When described the soil was moist throughout. (Colors are for dry soil unless otherwise noted).
Oi--0 to 1 inches, (0 to 3 cm); slightly decomposed plant material; abrupt smooth boundary.
A1--1 to 4 inches, (3 to 10 cm); brown (10YR 5/3) broken face sandy loam, dark brown (10YR 3/3) broken face moist; 18 percent clay; moderate very coarse subangular blocky and moderate coarse subangular blocky structure; slightly hard, very friable, nonsticky, nonplastic; few very fine roots; many very fine interstitial pores; 5 percent well rounded, indurated 2 to 75 millimeter mixed rock fragments; neutral, pH 7.2 by pH meter 1:1 water; abrupt smooth boundary.
A2--4 to 10 inches, (10 to 26 cm); brown (10YR 5/3) broken face sandy clay loam, dark brown (10YR 3/3) broken face moist; 22 percent clay; moderate very coarse subangular blocky and moderate coarse subangular blocky structure; slightly hard, very friable, slightly sticky, slightly plastic; many very fine interstitial pores; 10 percent well rounded, indurated 2 to 75 millimeter mixed rock fragments; neutral, pH 7.1 by pH meter 1:1 water; abrupt wavy boundary.
A3--10 to 19 inches, (26 to 48 cm); brown (10YR 5/3) broken face sandy clay loam, dark brown (10YR 3/3) broken face moist; 23 percent clay; moderate medium subangular blocky and moderate coarse subangular blocky structure; slightly hard, very friable, slightly sticky, slightly plastic; many very fine interstitial pores; 10 percent well rounded, indurated 2 to 75 millimeter mixed rock fragments; slightly alkaline, pH 7.4 by pH meter 1:1 water; abrupt smooth boundary.
C--19 to 23 inches, (48 to 59 cm); pale brown (10YR 6/3) broken face very gravelly sand, dark grayish brown (10YR 4/2) broken face moist; 2 percent clay; single grain; loose, loose, nonsticky, nonplastic; many very fine interstitial pores; 50 percent well rounded indurated 2 to 75 millimeter mixed rock fragments; slightly alkaline, pH 7.6 by pH meter 1:1 water; abrupt smooth boundary.
Ab1--23 to 35 inches, (59 to 90 cm); brown (10YR 4/3) broken face silty clay loam, very dark brown (10YR 2/2) broken face moist; 27 percent clay; moderate coarse subangular blocky and moderate very coarse subangular blocky structure; hard, friable, moderately sticky, moderately plastic; common very fine tubular pores; slightly alkaline, pH 7.4 by pH meter 1:1 water; clear smooth boundary.
Ab2--35 to 55 inches, (90 to 140 cm); brown (10YR 4/3) broken face clay loam, very dark grayish brown (10YR 3/2) broken face moist; 29 percent clay; moderate medium subangular blocky structure; hard, friable, moderately sticky, moderately plastic; common coarse roots; common very fine tubular pores; slightly alkaline, pH 7.4 by pH meter 1:1 water; abrupt smooth boundary.
AB--55 to 79 inches, (140 to 200 cm); brown (10YR 5/3) broken face sandy clay loam, dark brown (10YR 3/3) broken face moist; 25 percent clay; moderate medium subangular blocky structure; hard, friable, moderately sticky, moderately plastic; common very fine tubular pores; slightly alkaline, pH 7.4 by pH meter 1:1 water;
TYPE LOCATION: Santa Clara County, California, Landels School Park, City of Mountain View, in bark area south of playing field midway between sidewalk, in a non sectionalized area of Township 6S, Range 2W, UTM Zone 10, Northing4138243, Easting 0582350 NAD83. - U.S.G.S Quad: Mountain View, California.
RANGE IN CHARACTERISTICS:
The mean annual soil temperature is 60 to 62 degrees F. The soil moisture control section is dry in all parts from about June 1 to October 1 (about 120 days). The particle size control section averages 18 to 27 percent clay, 0 to 20 percent rock fragments, mostly gravel. Depth to a buried soil is 40 to 120 centimeters. However, the buried soil may not occur within 150 centimeters in some pedons. The soil is non calcareous in most pedons. Organic matter ranges from 2 to 4 percent to a depth of 26 centimeters.
The A horizon dry color is 10YR 4/2, 4/3, 5/2, 5/3; 2.5Y 4/2 or 5/3. Moist color is 10YR 2/2, 3/2, 3/3 or 2.5Y 3/2. Texture is sandy loam, fine sandy loam or loam and their gravelly equivalents. Clay content ranges from 15 to 25 percent clay. Rock fragments range from 0 to 20 percent and are 2 to 75 millimeters in size. Reaction ranges from 6.1 to 7.8.
The C horizon dry color is 10YR 4/2, 5/2, 5/4, 6/3, or 2.5Y 4/2. Moist color is 10YR 3/3, 4/2, 4/3 or 2.5Y 3/2. Texture is very gravelly sand, very gravelly loamy sand or very gravelly sandy loam. Clay content ranges from 2 to
10 percent. Rock fragments range from 40 to 55 percent and are 2 to 75 millimeters in size. Reaction ranges from 6.6 to 7.8.
The Ab horizon dry color is 10YR 4/3; 2.5Y 4/2, 5/2 or 5/3. Moist color is 10YR 2/2, 3/2, 3/3; 2.5Y 3/2 or 3/3. Texture is silty clay loam, clay loam or sandy clay loam. Clay content ranges from 25 to 30 percent. Rock fragments range from 0 to 20 percent and are 2 to 75 millimeters in size. Reaction ranges from 7.4 to 7.8.
The AB horizon dry color is 10YR 4/3, 5/3; 2.5Y 5/2 or 5/3. Moist color is 10YR 2/2, 3/2, 3/3; 2.5Y 3/2 or 3/3. Texture is sandy loam or sandy clay loam. Clay content ranges from 10 to 25 percent. Rock fragments range from 0 to 20 percent and are 2 to 75 millimeters in size. Reaction ranges from 7.4 to 7.8.
COMPETING SERIES: These are the Mocho and Nueva soils. Mocho soils are calcareous throughout. Nueva soils are somewhat poorly drained and have a difference between mean winter and mean summer temperatures of over 30 degrees F.
GEOGRAPHIC SETTING: Landelspark soils are on floodplains. Slopes are 0 to 2 percent. These soils formed in alluvium weathered from mixed rock sources. Elevation is 50 to 250 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 Still and Elpaloalto(T) soils. The Still soils are not stratified and the Elpaloalto(T) soils are fine-silty.
DRAINAGE AND PERMEABILITY: Well drained; medium runoff; moderately permeability. Flooding has been controlled in most areas by a combination of levees, channelization of streams, upstream flood control dams and historic groundwater pumping.
USE AND VEGETATION: This soil is used for urban uses including residential, industrial, commercial and recreation. Vegetation is urban trees, bushes and lawns, native vegetation was oaks, annual grasses and forbs.
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 Landels School Park, City of Mountain View.
REMARKS:
Particle Size Control Section for this pedon: 9.8 to 39 in. (25 to 100 cm)
Diagnostic horizons and features recognized in this pedon are:
Mollic Epipedon: 1 to 19 in. 3 to 48 cm
The soil moisture control section is dry in all parts from about June 1 to October 1 (about 120 days).
NASIS Pedon ID: 06ca08564120
ADDITIONAL DATA: