LOCATION HAIRE CAEstablished Series
TAXONOMIC CLASS: Fine, mixed, superactive, thermic Typic Haploxerults
TYPICAL PEDON: Haire clay loam - pasture (Colors are for dry soil unless otherwise noted.)
Ap--0 to 7 inches; gray (10YR 5/1) light clay loam, very dark grayish brown (10YR 3/2) moist; distinct brown mottles; hard, friable, nonsticky, plastic; many very fine roots; many very fine tubular pores; neutral; clear smooth boundary. (4 to 8 inches thick)
A12--7 to 12 inches; grayish brown (10YR 5/2) light clay loam, very dark grayish brown (10YR 3/2) moist; massive; hard, friable, slightly sticky, plastic; common fine roots; many very fine and common fine tubular pores; few thin clay films lining pores; slightly acid; clear smooth boundary. (3 to 7 inches thick)
A3--12 to 24 inches; grayish brown (10YR 5/2) clay loam, very dark grayish brown (10YR 3/2) moist; common fine distinct dark reddish brown mottles; massive; hard, friable, sticky, plastic; few very fine roots; many very fine and fine, few medium tubular pores; few thin clay films lining pores; common worm casts; slightly acid; abrupt wavy boundary. (9 to 14 inches thick)
B2t--24 to 36 inches; pale brown (10YR 6/3) clay, dark grayish brown (2.5Y 4/2) moist; upper part weak medium columnar structure with thin discontinuous bleached capping on columns, lower part is massive; extremely hard, very firm, sticky, very plastic; few very fine roots; common very fine tubular pores; continuous thick clay films; upper two to three inches of peds have black colloidal stains on faces; strongly acid; gradual wavy boundary. (8 to 15 inches thick)
IIC--36 to 60 inches; pale yellow (5Y 7/3) and pale brown (10YR 6/3) very gravelly clay loam, variegated dark brown (10YR 3/3) and olive brown (2.5Y 4/4) moist; massive; sticky, plastic; few fine roots; strongly acid (pH 5.2).
TYPE LOCATION: Sonoma County, California; in the NW1/4 NE1/4 sec. 2, T.4N., R.SW.
RANGE IN CHARACTERISTICS: The mean annual soil temperature is 59 degrees to 63 degrees F. Soil between depths of about 4 and 12 inches usually is dry from May until November and usually is moist the rest of the year.
The A horizon is gray to dark grayish brown (10YR 5/1, 5/2, 4/1, 4/2). It is loam or light clay loam and in some pedons it is gravelly. It is neutral to moderately acid. Fine mottles are present in some pedons.
The B2t horizon is pale brown to dark grayish brown (10YR 6/3, 5/3, 7/3, 7/4, 6/4, 6/2, 5/3, 5/2, 4/2; 2.5Y 6/2) or olive gray (5Y 5/2). It is light clay, sandy clay or clay. This horizon has blocky, prismatic or columnar structure. It is moderately to strongly acid and has 20 to 35 percent base saturation.
The C horizon has dry value of 6 or 7 and is loam or clay loam with 2 to 75 percent rock fragments of various sizes. It is strongly or very strongly acid.
COMPETING SERIES: These are the Cotati, Huichica, Rilarc, Santa Ynez, San Ysidro, Sebastopol, Tierra, and Wright series. Cotati soils have an albic horizon and a mean soil temperature of 57 degrees to 58 degrees F. Huichica soils have a duripan. Rilarc and Sebastopol soils have a mean soil temperature of less than 59 degrees F. Santa Ynez soils have an argillic horizon that has more than 35 percent base saturation and more than 35 percent rock fragments. San Ysidro and Tierra soils have base saturation of more than 35 percent in the argillic horizon. Wright soils are wet, have mottles, and have more than 35 percent base saturation in the argillic horizon.
GEOGRAPHIC SETTING: Haire soils are on nearly level to moderately steep hills at elevations of 20 to 2,400 feet. They formed in terrace deposits and in part in residuum weathered from arkosic sandstone and granodiorite. The climate is subhumid mesothermal with warm dry summers and cool moist winters. The mean annual precipitation is 20 to 45 inches. Average July temperature is about 70 degrees F., average January temperature is about 46 degrees F., and the mean annual temperature is about 54 degrees to 60 degrees F. The freeze-free season is 200 to 300 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Competing Cotati soils and the Arbuckle, Clear Lake, Santa Lucia, and Sheridan soils. Arbuckle soils have less than 35 percent clay and more than 75 percent base saturation in the argillic horizon. Clear Lake soils have clay texture to the surface; the soil cracks and has slickensides. Santa Lucia and Sheridan soils have mollic epipedons more than 20 inches thick and lack an argillic horizon.
DRAINAGE AND PERMEABILITY: Moderately well drained; slow to rapid runoff; very slow permeability.
USE AND VEGETATION: Principal use is pasture, dry and irrigated. Uncultivated vegetation is mostly annual grasses and forbs.
DISTRIBUTION AND EXTENT: Sonoma and Monterey Counties, California The soils are of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: Monterey County, California, 1972.
REMARKS: The Haire soils formerly were classified Noncalcic Brown soils
The activity class was added to the classification in February of 2003. Competing series were not checked at that time. - ET
OSED scanned by SSQA. Last revised by state 10/74.