LOCATION ENDERSBY OREstablished Series
TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, mesic Cumulic Haploxerolls
TYPICAL PEDON: Endersby loam, cultivated. (Colors are for moist soil unless otherwise noted.)
Ap1--0 to 2 inches, very dark grayish brown (10YR 3/2) loam, dark brown (10YR 4/3) dry; weak thin platy structure; soft, very friable, nonsticky and nonplastic; few very fine roots; many very fine irregular pores; neutral (pH 6.8); abrupt wavy boundary. (2 to 7 inches thick)
Ap2--2 to 10 inches; very dark grayish brown (10YR 3/2) loam, dark brown (10YR 4/3) dry; massive; slightly hard, friable, slightly sticky and slightly plastic; few very fine roots; many very fine tubular pores; neutral (pH 6.9); abrupt wavy boundary. (0 to 9 inches thick)
AC--10 to 24 inches, dark brown (10YR 3/3) loam, brown (10YR 4/3) dry; massive; slightly hard, friable, slightly sticky and slightly plastic; few very fine roots; many very fine tubular pores; neutral (pH 7.0); clear wavy boundary. (10 to 18 inches thick)
C1--24 to 38 inches, dark brown (10YR 3/3) loam, brown (10YR 5/3) dry; massive; soft, very friable, slightly sticky and slightly plastic; few very fine roots; many very fine irregular pores; moderately alkaline (pH 7.9); gradual wavy boundary. (8 to 20 inches thick)
C2--38 to 53 inches, dark brown (10YR 3/3) fine sandy loam, brown (10YR 5/3) dry; massive; soft, very friable, nonsticky, nonplastic; few very fine roots; many very fine irregular pores; moderately alkaline (pH 7.9); clear wavy boundary. (10 to 20 inches thick)
2C3--53 to 60 inches, multiclolored very gravelly sand; single grained; loose.
TYPE LOCATION: Wasco County, Oregon; 150 feet south of Fifteen-mile Road in the southwest 1/4 northeast 1/4 southwest 1/4 sec. 25, T.2N., R.14E.
RANGE IN CHARACTERISTICS: The soils are usually moist but are dry throughout the control section for 90 consecutive days or more during the 4-month period following the summer solstice. The mean annual soil temperature is 51 to 55 degrees F. Depth to very gravelly sand or coarse-textured material is 40 to 60 inches. The upper 40 inches has 0 to 15 percent gravel.
The A horizon has value of 5 or 4 dry and chroma of 2 or 3. It is loam or fine sandy loam. This horizon has weak platy or weak fine granular structure or is structureless.
The AC and C horizons have value of 4 to 6 dry and 3 or 4 moist; values of 6 dry and 4 moist are at depths below 20 inches. These horizons are loam or fine sandy loam. The AC horizon is replaced in some pedons with a B horizon having weak prismatic or subangular blocky structure. The C horizon is mildly to moderately alkaline, and in places is stratified with thin lenses ranging from silt to loamy sand. Rock fragments below depth of 40 inches range from 50 to 80 percent.
COMPETING SERIES: These are the Evans, Leavenworth, Narcisse, Patit Creek, Pleasant View, and Redola series. Evans soils are slightly acid below the A horizon. Leavenworth soils have chroma of 1 or 2 throughout the profiles, are moderately well drained, and have high water tables for short periods of time. Narcisse soils are neutral to slightly acid throughout and are mottled in the control section. Patit Creek soils are very gravelly in the lower part of the control section. Pleasant View and Redola soils are calcareous throughout or in some part above depth of 40 inches. Also, Redola soils are gravelly in the control section.
GEOGRAPHIC SETTING: The Endersby soils are on nearly level bottomlands at elevations of 200 to 1,500 feet. The soils formed in moderately coarse-textured alluvium from mixed materials including volcanic ash and loess. The climate is semiarid with moist winters and dry summers. The mean winter temperature is 34 to 36 degrees F, mean summer temperature is 65 to 67 degrees F, and mean annual temperature is 49 to 53 degrees F. The average annual precipitation is 11 to 14 inches. The frost-free period is 140 to 170 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are Hermiston, Onyx, Pedigo, and Tygh soils. Hermiston and Onyx soils are coarse-silty. Also, the Hermiston soils are calcareous. Pedigo are somewhat poorly drained, mottled, and have chroma of 2 or less throughout the profile.
DRAINAGE AND PERMEABILITY: Somewhat excessively drained; slow runoff; moderately rapid permeability.
USE AND VEGETATION: These soils are used primarily for forage crops. Other uses are dry and irrigated small grain, range, pasture, wildlife, and water supply. Vegetation consists of bunchgrasses and forbs.
DISTRIBUTION AND EXTENT: North-central Oregon. This series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Wasco County, Oregon, 1975.