LOCATION LANGELLAIN OREstablished Series
TAXONOMIC CLASS: Fine-loamy over clayey, mixed, superactive, mesic Ultic Haploxeralfs
TYPICAL PEDON: Langellain loam, oak woodland. (Colors are for moist soil unless otherwise noted.)
O--0.5 to 0 inches; dried grasses, twigs and leaves.
A1--0 to 6 inches; dark reddish brown (5YR 3/3) loam, brown (10YR 5/3) dry; moderate fine granular structure; slightly hard, very friable, nonsticky and nonplastic; common fine roots; many fine irregular pores; slightly acid (pH 6.2); abrupt smooth boundary. (2 to 6 inches thick)
A2--6 to 10 inches; dark brown (7.5YR 3/4) loam, brown (10YR 5/3) dry; moderate fine and very fine subangular blocky structure; slightly hard, very friable, nonsticky and nonplastic; common fine roots; many fine and medium irregular pores; moderately acid (pH 6.0); abrupt irregular boundary. (3 to 5 inches thick)
Bt1--10 to 21 inches; strong brown (7.5YR 4/6) loam, brown (7.5YR 5/4) dry; moderate fine subangular blocky structure; hard, friable, slightly sticky and plastic; common fine and medium roots; many fine and medium irregular pores; common thin clay films in pores and few thin clay films on ped faces; moderately acid (pH 5.6); abrupt wavy boundary. (6 to 11 inches thick)
2Bt2--21 to 33 inches; brown (10YR 4/3) clay, grayish brown (10YR 5/2) dry; common medium faint and distinct strong brown (7.5YR 5/6 and 7.5YR 4/6) and brown (7.5YR 4/4) mottles dominantly in the upper 3 inches; strong medium prismatic structure; extremely hard, firm, sticky and very plastic; few fine and medium roots; few fine tubular pores; common moderately thick clay films on peds and in pores; strongly acid (pH 5.4); clear wavy boundary. (6 to 12 inches thick)
2Bt3--33 to 38 inches; yellowish brown (10YR 5/4) clay, grayish
brown (10YR 5/2) dry; strong medium prismatic structure; very hard, firm, sticky and very plastic; few fine and medium roots; few fine tubular pores; common moderately thick clay films on peds and in pores; strongly acid (pH 5.2); clear wavy boundary. (3 to 6 inches thick)
2Cr--38 inches; soft decomposed sandstone.
TYPE LOCATION: Jackson County, Oregon; about 100 feet west of road, about 250 feet west and 1,350 feet south of the NE corner of sec. 21, T. 35 S., R. 2 W.
RANGE IN CHARACTERISTICS: The soils are usually moist but are dry throughout between 4 to 12 inches for 80 to 110 consecutive days during the summer. The soil is 20 to 40 inches deep to a paralithic contact. Thickness of the solum above the nonconforming 2Bt horizon ranges from 12 to 28 inches. The mean annual soil temperature is 48 to 56 degrees F. The particle-size control section averages 20 to 35 percent clay in the upper part and 45 to 60 percent in the lower part.
The A horizon has hue of 5YR, 7.5YR or 10YR, value of 3 moist and 4 through 6 dry, and chroma of 2 through 4 moist and dry. It has 1 to 3 percent organic matter.
The Bt horizon has hue of 5YR, 7.5YR or 10YR, value of 3 through 5 moist and 4 through 6 dry, and chroma of 1 through 6 moist and dry. It is loam or clay loam with 20 to 35 percent clay.
The 2Bt horizon has hue of 2.5YR, 10YR, or 7.5YR, value of 4 or 5 moist, 4 through 8 dry, and chroma of 1 through 6 moist and dry. It has faint to prominent mottles. It has 45 to 60 percent clay.
COMPETING SERIES: These are the Selmac and Sutherlin series. The Selmac and Sutherlin soils are deep to bedrock.
GEOGRAPHIC SETTING: The Langellain soils overlie sandstone on ridges, knolls, and hillslopes. Elevations range from 1,300 to 3,200 feet. Slopes are 1 to 40 percent. The climate is characterized by hot dry summers and cool moist winters. The mean annual precipitation ranges from 18 to 40 inches. The mean annual temperature is 48 to 54 degrees F. The mean January temperature is 37 degrees F, and mean July temperature is 72 degrees F. The frost-free period is 130 to 180 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Brader and Debenger soils. Brader soils are shallow. Debenger soils are fine-loamy.
DRAINAGE AND PERMEABILITY: Moderately well drained; runoff is medium on the gentle slopes and rapid on steeper slopes. Permeability is moderate in the upper part of the solum and very slow in the lower part. A perched water table is present at 0.5 to 2.0 feet from December through May.
USE AND VEGETATION: Langellain soils are used for woodland, pasture, water supply, homesite development and wildlife habitat. Native vegetation is ponderosa pine, Oregon white oak, Douglas fir, and associated shrubs forbs and grasses.
DISTRIBUTION AND EXTENT: Southwestern Oregon. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: Jackson County Area, Oregon, 1988.
REMARKS: Diagnostic horizons and features:
Ochric epipedon - moist chroma of 4 from 6 to 10 inches.
Argillic horizon - the zone from 10 to 38 inches.
Absolute increase in clay of 30 percent between the Bt1 and 2Bt2 horizons.
Ultic intergrade - assume a base saturation of less than 75 percent in the lower part of the argillic horizon.
Mollic intergrade - moist value of 3 from 0 to 10 inches.
The superactive cation exchange activity class was added to the classification in 10/2005. The competing series section was not updated at that time. Last revision 10/1988.