LOCATION TYNDALL CA
Established Series
Rev. WFA/GMK/ET
01/2023
TYNDALL SERIES
The Tyndall series is a member of the coarse-loamy, superactive, mixed, calcareous, thermic family of Aeric Halaquepts. Typically, Tyndall soils have grayish brown, mildly alkaline A horizons and stratified light brownish gray, mottled, fine sandy loam, calcareous horizons developed in sedimentary alluvium.
TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, calcareous, thermic Fluvaquentic Endoaquepts
TYPICAL PEDON: Tyndall very fine sandy loam - cultivated (Colors are for dry soil unless otherwise noted.)
Ap--0 to 8 inches; grayish brown (2.5Y 5/2) heavy very fine sandy loam, very dark grayish brown (2.5Y 3/2) moist; massive; soft, very friable, slightly sticky, slightly plastic; common very fine roots; common very fine tubular pores; slightly effervescent, disseminated lime; slightly alkaline (pH 7.5); abrupt smooth boundary. (7 to 10 inches thick)
A3--8 to 16 inches; light brownish gray (2.5Y 6/2) very fine sandy loam, dark grayish brown (2.5Y 4/2) moist; massive; soft, very friable, slightly sticky, slightly plastic; common very fine and few fine roots; common very fine tubular and few very fine interstitial pores; slightly effervescent, disseminated lime; moderately alkaline (pH 8.0), abrupt smooth boundary. (3 to 12 inches thick)
B21--16 to 24 inches; light brownish gray (2.5Y 6/2) very fine sandy loam, dark grayish brown (2.5Y 4/2) moist; many medium prominent brownish yellow (10YR 6/6) mottles, dark yellowish brown (10YR 4/4) moist; massive; soft, very friable, slightly sticky, slightly plastic; common very fine and few fine roots; common very fine tubular and few very fine interstitial pores; strongly effervescent, disseminated lime; moderately alkaline (pH 8.0); abrupt wavy boundary. (6 to 10 inches thick)
B22--24 to 41 inches; mottled dark yellowish brown, brownish yellow, and light brownish gray (10YR 4/4, 6/6; 2.5Y 6/2) fine sandy loam, dark grayish brown, olive gray, and dark yellowish brown (2.5Y 4/2; 5YR 4/2; 10YR 3/4 and 4/4) moist; massive; soft, very friable, slightly sticky, slightly plastic; common very fine roots; common very fine and few fine tubular and few very fine interstitial pores; slightly effervescent, disseminated lime; moderately alkaline (pH 8.4); abrupt smooth boundary. (10 to 20 inches thick)
B23--41 to 46 inches; pale olive (5Y 6/3) very fine sandy loam, olive (5Y 4/3) moist; many medium prominent brownish yellow and dark yellowish brown (10YR 6/6 and 4/4) mottles, yellowish brown and dark yellowish brown (10YR 5/6 and 4/4) moist; massive; soft, friable, slightly sticky, slightly plastic; few very fine roots; common very fine and few fine tubular and few very fine interstitial pores; medium irregular-shaped manganese concretions; strongly effervescent, disseminated lime; strongly alkaline (pH 9.0); abrupt smooth boundary. (3 to 7 inches thick)
C1--46 to 48 inches; light brownish gray (2.5Y 6/2) sandy loam, dark grayish brown (2.5Y 4/2) moist; common medium distinct yellowish brown (10YR 5/4) mottles, dark yellowish brown (10YR 4/4) moist; massive; soft, very friable, nonsticky, nonplastic; few very fine roots; common very fine tubular pores; variegated sand grain colors; strongly effervescent, disseminated lime; strongly alkaline (pH 8.8); abrupt smooth boundary. (1 to 5 inches thick)
C2--48 to 52 inches; mottled yellowish brown, brownish yellow and pale olive (10YR 5/6, 6/6; 5Y 6/3) very fine sandy loam, dark yellowish brown, yellowish brown and olive (10YR 4/4, 5/6; 5Y 4/3) moist; massive; soft, friable, slightly sticky, slightly plastic; few very fine oblique roots; common very fine and few fine tubular and few very fine vesicular pores; medium irregular shaped manganese concretions; strongly effervescent, disseminated lime; strongly alkaline (pH 9.0).
TYPE LOCATION: Yolo County, California; about 6 miles northwest of Knights Landing; 255 feet north from the center of the State Highway 45 and .5 mile west of Reclamation District 108 pump in the SW1/4NW1/4NW1/4 sec. 30, T.12N., R.2E., MDBM.
RANGE IN CHARACTERISTICS: The soils are usually moist and have mottles with chroma of 2 or less within a depth of 20 inches. Undrained pedons are saturated in winter to within 40 inches or closer to the surface. The mean soil temperature is about 62 degrees to 64 degrees F. Typically, the soils are calcareous throughout. Slight saline-alkali conditions may be present. The 10 to 40 inch zone averages fine sandy loam and very fine sandy loam with less than 18 percent clay and about 20 to 25 percent sand coarser than very fine sand. There is considerable coarse stratification with individual horizon textures ranging from loamy sand to silt loam. This section is moderately to strongly alkaline.
The A horizon has hue of 10YR or 2.5Y, dry value of 4 or 5, and dry and moist chroma of 1 or 2. The darkened A horizon is too thin for a mollic epipedon. This horizon is fine sandy loam to silt loam. It has crumb to subangular blocky structure. Some pedons are massive but have a soft or slightly hard dry consistence.
The B horizon is marked by mottles, absence of fine stratification, and may have lime segregation's in the lower part. It includes light brownish gray, light yellowish brown, light olive gray, or pale olive dry. Moist colors are dark grayish brown (2.5Y) in most parts, and olive gray (5Y) in some parts.
The lower part of the C horizon is light brownish gray, pale olive, yellowish brown or brownish yellow, and contains mottles. It is similar in texture to the 10 to 40 inch control section.
COMPETING SERIES: These are the
Camarillo,
Foster,
Grangeville,
Hilmar,
Hueneme,
Laugenour,
Maria,
Pacheco,
Piper, and
Sycamore series. Camarillo, Hilmar and Hueneme soils lack mottles above a depth of 20 inches. Grangeville, Foster, and Pacheco soils have mollic epipedons; Pacheco soils have more than 18 percent clay in the control section. Laugenour soils are pale colored through the A horizon with moist value of 4 or more. Maria and Sycamore soils have more than 18 percent clay in the control section. Piper soils average sandy loam or fine sandy loam in the texture control section (See Remarks.)
GEOGRAPHIC SETTING: Tyndall soils are on nearly level alluvial fans at elevations of 0 to 70 feet. The soils formed in sedimentary alluvium low in clay. The climate has hot dry summers and cool moist winters Mean annual precipitation is 15 to 18 inches; average January temperature is 45 degrees F., average duly temperature is 77 degrees F.; mean annual temperature is 60 degrees to 62 degrees F. The frost-free season averages about 250 to 280 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Lang,
Merritt,
Reiff, and
Sacramento soils and the competing
Laugenour and
Sycamore soils. Lang soils are sandy throughout. Merritt soils have more than 18 percent clay in the 10 to 40 inch section. Reiff soils lack mottles and high water tables. Sacramento soils are fine textured.
DRAINAGE AND PERMEABILITY: Natural drainage is somewhat poor to poor, but it has been improved in many areas by use of levees and other artificial means; runoff is slow; permeability is moderately rapid.
USE AND VEGETATION: The soil is largely used for intensive row, field, and orchard crops.
DISTRIBUTION AND EXTENT: Mainly along the Sacramento River and its tributaries occurring in the Sacramento Valley, California. The soils are inextensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: Yolo County, California, 1971.
REMARKS: The Tyndall soils would formerly have been classified as Alluvial soils. The Piper and Tyndall soils are in the same family. Additional study and differentiation is needed if one series is not to be inactivated. The classification was updated in February 2001 using the Eighth Edition to Soil Taxonomy. This series was formerly classified as coarse-loamy, mixed, calcareous, thermic, Areic Haplaquepts. Competing series were not checked at that time.
OSED scanned by SSQA. Last revised by state on 6/72.
National Cooperative Soil Survey
U.S.A.