LOCATION LANG CAEstablished Series
TAXONOMIC CLASS: Mixed, thermic Typic Psammaquents
TYPICAL PEDON: Lang sandy loam - on a west facing slope of less than l percent in an irrigated orchard at 25 feet elevation. (Colors are for dry soil unless otherwise stated).
Ap--0 to 6 inches; pale brown (10YR 6/3) sandy loam, dark brown (10YR 4/3) moist; massive; soft, very friable, nonsticky and nonplastic, common very fine roots; few very fine tubular pores; medium acid (pH 6.0); clear smooth boundary. (5 to 12 inches thick)
A--6 to 13 inches; pale brown (10YR 6/3) loamy fine sand, dark yellowish brown (10YR 4/4) moist; many fine distinct brownish yellow (10YR 6/8) mottles, yellowish brown (10YR 5/8) moist; massive; soft very friable, nonsticky and nonplastic; few very fine, fine, and medium roots; few very fine tubular pores; moderately acid (pH 5.6); clear wavy boundary. (0 to 11 inches thick)
AC--13 to 19 inches; mottled light brownish gray (10YR 6/2) and brownish yellow (10YR 6/6) loamy fine sand, mottled dark brown (10YR 4/3) yellowish brown (10YR 5/6), and grayish brown (10YR 5/2) moist; massive; soft, very friable, nonsticky and nonplastic; few fine, common medium and coarse roots; few very fine tubular pores; slightly acid (pH 6.5); abrupt wavy boundary. (0 to 7 inches thick)
C1--19 to 35 inches; light gray (10YR 7/1) fine sand, light brownish gray (10YR 6/2) moist; common medium distinct yellowish brown (10YR 5/6) mottles moist; single grained; loose, nonsticky and nonplastic; few fine roots; slightly acid (pH 6.5); abrupt wavy boundary. (15 to 30 inches thick)
C2--35 to 47 inches; light brownish gray (10YR 6/2) loamy fine sand, yellowish brown (10YR 5/4) moist; many medium distinct reddish yellow (7.5YR 6/8) mottles, strong brown (7.5YR 5/8) moist; massive, soft, very friable, nonsticky and nonplastic; common medium and coarse roots; few very fine tubular pores; neutral (pH 7.0); clear wavy boundary. (8 to 17 inches thick)
2C3--47 to 52 inches; mottled gray (5Y 5/1) reddish yellow (7.5YR 6/6), yellowish red (5YR 4/8) silt loam, mottled olive gray (5Y 5/2), dark reddish brown (5YR 3/4), and strong brown (7.5YR 5/8) moist; massive; soft, friable, slightly sticky and nonplastic; few fine roots; common very fine and fine tubular pores; neutral (pH 7.0); abrupt wavy boundary. (2 to 17 inches thick).
3C4--52 to 85 inches; light gray (10YR 7/1) loamy fine sand, light brownish gray (10YR 6/2) moist; many medium prominent reddish yellow (5YR 6/8) mottles, yellowish red (5YR 5/8) moist; massive; soft, very friable, nonsticky and nonplastic; few fine roots; slightly acid (pH 6.5).
TYPE LOCATION: Yolo County, California; about 10 miles northeast of Woodland or about 6 miles north of Elkhorn Ferry; 0.4 miles south of Road 16 on Road 117 and 265 feet west of Road 117 in an unsectionized portion of T.10 N., R.3 E. Taylor Monument 7.5 Quad.
RANGE IN CHARACTERISTICS: The mean annual soil temperature is 59 to 71 degrees F. Distinct or prominent mottles occur within 5 to 48 inches of the surface. Low chromas occur within 20 inches or an aquic moisture regime is present. The 10 to 40 inch control section is loamy fine sand to sand throughout and is stratified.
The A horizon is 10YR 6/3 or 6/2. Moist colors are 10YR 4/3 or 4/4. It is sandy loam and loamy sand and has weak or no structure. It ranges from slightly acid to strongly acid.
The C horizon is 10YR 7/1, 6/1, 6/2, 5/1; or 5Y 5/1. Moist colors are 10YR 6/2, 5/4; or 5Y 5/2. It is loamy fine sand to sand. Fine stratification within the C horizon or coarse stratification between horizons is present. Reaction is slightly acid or neutral.
COMPETING SERIES: These are the Carteret and Dello soils in the same family and the Columbia and Hilmar soils. The Carteret soils are very poorly drained and the profiles are continuously saturated. Columbia soils are coarse-loamy. Dello soils lack coarse stratification in the 10 to 40 inch zone. Hilmar soils have a contrasting sandy over loamy textures in the series control section.
GEOGRAPHIC SETTING: The Lang soils are on alluvial fans and have slopes of 0 to 1 percent. The soils formed in material weathered from mixed alluvium. Elevations are 15 to 30 feet. The climate is dry subhumid with hot dry summers and cool moist winters. Mean annual precipitation is 16 to 20 inches. Mean January temperature is 46 degrees F; mean July temperature is 77 degrees F; mean annual temperature is about 62 degrees F. The frost-free season ranges from 250 to 280 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Sacramento, Sycamore, Tyndall, and Valdez soils. Sacramento soils are very-fine textured. Sycamore and Valdez soils have more than 18 percent clay and less than 15 percent sand coarser than very fine sand. Tydall soils have coarse-loamy particle size control sections.
DRAINAGE AND PERMEABILITY: Natural drainage is poor to somewhat poorly drained. Altered drainage occurs in reclamation districts and areas protected by levees. The water table varies from near the surface during the rainy season to below 60 inches during dry periods. Surface runoff is very slow and permeability is rapid. Subject to frequent overflow where not protected by levees.
USE AND VEGETATION: Used for cropland, wildlife habitat and recreation. Commonly grown crops are irrigated orchards, row crops, forage crops, and field crops of corn, sugar beets, tomatoes, wheat, alfalfa hay and walnuts. When uncultivated vegetation is oak, cottonwood, willows and annual grasses and forbs.
DISTRIBUTION AND EXTENT: Along the Sacramento River in Central California. The soils are not extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: Yolo County, California, 1971.