LOCATION PENDOLA CAEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, active, mesic Ultic Haploxeralfs
TYPICAL PEDON: Pendola cobbly sandy loam - on a west facing slope of 60 percent under mixed conifers at 2,650 feet elevation. (Colors are for dry soil unless otherwise stated. When described on May 6, 1975, the soil was moist throughout.)
0--1 to 0 inches; partially decomposed needles, leaves and twigs.
A1--0 to 2 inches; brown (7.5YR 4/2) cobbly sandy loam, dark brown (7.5YR 3/2) moist; strong medium granular structure; soft, friable, nonsticky and slightly plastic; few very fine and fine roots; common very fine and fine interstitial pores; 10 percent pebbles, 10 percent cobbles; slightly acid (pH 6.5); abrupt smooth boundary. (2 to 5 inches thick)
A2--2 to 9 inches; brown (7.5YR 4/4) cobbly sandy loam, dark reddish brown (5YR 3/4) moist; moderate medium subangular blocky structure; slightly hard, firm, nonsticky and slightly plastic; common very fine and fine and few medium roots; common very fine and fine interstitial pores; 15 percent pebbles; 15 percent cobbles; slightly acid (pH 6.3); clear smooth boundary. (6 to 8 inches thick)
Bt1--9 to 21 inches; red (2.5YR 4/6) very cobbly loam, dark red (2.5YR 3/6) moist; weak medium subangular blocky structure; slightly hard, firm, slightly sticky and slightly plastic; common fine, medium and coarse and few very fine roots; common fine interstitial pores; many colloids staining mineral grains; 30 percent cobbles, 5 percent pebbles; slightly acid (pH 6.3); diffuse wavy boundary. (10 to 15 inches thick)
Bt2--21 to 40 inches; red (2.5YR 4/6) very cobbly clay loam, dark red (2.5YR 3/6) moist; weak medium and coarse subangular blocky structure; slightly hard, firm, slightly sticky and slightly plastic; common fine and medium and few coarse roots; few fine and medium tubular pores; many moderately thick clay films on peds and lining pores; 45 percent cobbles, faces 5 percent pebbles; slightly acid (pH 6.5); gradual wavy boundary. (15 to 25 inches thick)
Bt3--40 to 60 inches; red (2.5YR 4/6) very cobbly clay loam, red (2.5YR 4/6) moist; weak coarse subangular blocky structure; slightly hard, firm, sticky and plastic; few fine and medium roots; common fine and medium interstitial pores, few fine tubular pores; continuous thin clay films on ped faces, many thin clay films lining pores; 50 percent cobbles; 5 percent pebbles; slightly acid (pH 6.5); diffuse wavy boundary. (15 to 30 inches thick)
BCt--60 to 90 inches; red (2.5YR 4/6) very cobbly clay loam, red (2.5YR 4/6) moist; weak coarse subangular blocky structure; slightly hard, firm, slightly sticky and slightly plastic; few fine and medium roots; few fine tubular pores; many thin clay films on ped faces, common moderately thick clay films lining pores; 45 percent cobbles; 5 percent pebbles, slightly acid (pH 6.5).
TYPE LOCATION: Yuba County, California; about 1.75 miles northwest of the intersection of Highway 49 and Pendola road on Pendola road to road cut on north side of road; 2000 feet south and 1500 feet east of the northwest corner section 3, T.18 N., R.8 E., Camptonville quadrangle.
RANGE IN CHARACTERISTICS: Depth to a paralithic contact ranges from 60 to over 90 inches. The mean annual soil temperature is 50 degrees to 54 degrees F. The soil temperature is below 47 degrees F. from December 15 to March 15. The soil moisture control section is dry in all parts from July 1 to October 31 (120 days) and moist in some or all parts from November 1 to June 30.
The A horizon has dry colors of 7.5YR 5/4, 5/2, 4/4, 4/2; 5YR 5/4, 5/3, 4/4, or 4/3. Moist colors are 7.5YR 4/2, 3/2 or 5YR 3/4 or 3/3. Content of rock fragments ranges from 15 to 35 percent. Cobbles range from 10 to 20 percent, gravel range from 5 to 20 percent.
The Bt horizon has colors of 2.5YR 5/8, 5/6, 4/8, 4/6 or 3/6. Moist colors are 2.5YR 4/6 or 3/6. Texture is very cobbly loam or very cobbly clay loam with 5 to 10 percent gravel and 30 to 55 percent cobbles. Content of rock fragments ranges from 35 to 60 percent. Clay content averages from 27 to 35 percent.
COMPETING SERIES: These are the Abegg, Asabean, Behemotosh, Chimneyrock, Collayomi, Hambone (T), Hollowtree, Holohan, Hoosimbin, Marpa, Skalan and Whispering soils. Abegg soils are dry for 60 to 80 days. Hambone soils have MAST of 47 to 49 degrees F. and have 25 to 35 percent clay in the control section. Asabean soils are medium to strongly acid in the Bt horizon and formed from sandstone. Behemotosh, Hollowtree, Marpa, Skalan and Whispering soils have bedrock at 20 to 40 inches. Holohan and Hoosimbin soils lack 2.5YR hues in the Bt horizon. Collayomi soils formed in amorphous material from basic igneous rocks. Gasper soils have a mean annual soil temperature of 47 to 49 degrees F. Chimneyrock soils are ....
GEOGRAPHIC SETTING: Pendola soils occur on mountains. Slopes are 15 to 75 percent. Elevations are 1500 to 3800. The soils are formed in colluvium and slope alluvium from basic metavolcanic rock. Climate is characterized by hot dry summers and cool moist winters. Mean annual precipitation varies from 50 to 75 inches. The mean January temperature is 40 degrees F; mean July temperature is 72 degrees F; the mean annual temperature varies from 53 to 57 degrees F. The frost-free season is 160 to 190 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Boomer and Sites series. Boomer soils have less than 35 percent rock fragments. Sites soils have a clayey particle size control section. They are in similar landscape positions.
DRAINAGE AND PERMEABILITY: Well drained; rapid to very rapid runoff; moderate permeability.
USE AND VEGETATION: This soil is used for timber production, wildlife habitat, watershed, and recreation. Natural vegetation consists of ponderosa pine, Douglas-fir, California black oak, sugar pine, white fir, tanoak and incense-cedar with an understory of common snowberry, mountain misery, poison-oak, deerbrush and sticky whiteleaf manzanita.
DISTRIBUTION AND EXTENT: Western Sierra Nevada Mountains, California. This series is not extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: Yuba County, California, 1992. Name is from Pendola road.
REMARKS: The Pendola series were originally mapped and correlated in the final correlation conference as Boomer Variant soils in the Tahoe National Forest Soil Survey.
The activity class was added to the classification in February of 2003. Competing series were not checked at that time. - ET