LOCATION LOGY WAEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, mesic Torrifluventic Haploxerolls
TYPICAL PEDON: Logy silt loam, range. (Colors are for dry soil unless otherwise stated.)
A1--0 to 2 inches; dark grayish brown (10YR 4/2) silt loam, very dark brown (10YR 2/2) moist; weak fine granular structure; soft, friable, slightly sticky and slightly plastic; many fine roots; common fine pores; neutral (pH 7.0); abrupt smooth boundary. (0 to 6 inches thick)
A2--2 to 12 inches; dark grayish brown (10YR 4/2) silt loam, very dark brown (10YR 2/2) moist; weak fine granular structure; soft, friable, slightly sticky and slightly plastic; common fine roots; common fine pores; 5 percent gravel; neutral (pH 7.2); gradual wavy boundary. (4 to 14 inches thick)
2Bw--12 to 19 inches; dark grayish brown (10YR 4/2) very gravelly loam, very dark grayish brown (10YR 3/2) moist; weak medium subangular blocky structure; soft, friable, slightly sticky and slightly plastic; common fine roots; common fine tubular pores; 35 percent gravel, 5 percent cobbles; slightly alkaline (pH 7.6); gradual wavy boundary. (5 to 21 inches thick)
2C1--19 to 39 inches; dark brown (10YR 4/3) extremely gravelly sandy loam, dark brown (10YR 3/3) moist; massive; soft, friable, slightly sticky and slightly plastic; few fine roots; 50 percent gravel, 15 percent cobbles; some gravel and cobbles have a light gray (10YR 7/2) lime-silica coating on the lower side; slightly alkaline (pH 7.4); abrupt wavy boundary. (0 to 25 inches thick)
2C2--39 to 60 inches; brown (10YR 5/3) extremely gravelly coarse sand, dark brown (10YR 3/3) moist; single grained; loose; 90 percent gravel and cobbles; neutral (pH 7.2).
TYPE LOCATION: Yakima County, Washington; three quarters of one mile west of State Highway 220, and one-half mile south of the Pine Cone Road; in the NE1/4 SW1/4 NW1/4 sec. 14, T.10N., R.16R., W.M.
RANGE IN CHARACTERISTICS: Depth to the sandy 2C2 horizon is 20 to 40 inches. The mean annual soil temperature is 50 to 55 degrees F. The mollic epipedon is 10 to 20 inches thick. These soils are dry in all parts between depths of 8 and 24 inches more than one-half of the time when the soil temperature at a depth of 20 inches is greater than 41 degrees F. The particle-size control section is 35 to 80 percent coarse fragments by volume and 5 to 15 percent clay.
The A horizon has value of 4 or 5 dry, 2 or 3 moist and chroma of 1 to 3 dry, 1 or 2 moist. Reaction is neutral or slightly alkaline.
The 2Bw horizon has value of 4 or 5 dry, 3 or 4 moist and chroma of 1 to 3 dry, or 2 or 3 moist. It is loam, silt loam, or sandy loam. and is very gravelly or extremely gravelly. Reaction is neutral or slightly alkaline.
Organic matter is less than one percent.
The 2C1 horizon has value of 4 or 5 dry, 3 or 4 moist and chroma of 2 to 4 dry or moist. Reaction is neutral or slightly alkaline.
The 2C2 horizon is multicolored or has value of 5 or 6 dry, 3 or 4 moist, and chroma of 2 or 3 dry or moist. It is very gravelly extremely gravelly or extremely cobbly loamy sand, sand, or coarse sand with thin strat of sandy loam. Reaction is neutral to moderately alkaline.
COMPETING SERIES: These are the Festus (T) and Pelton series. Festus soils contain carbonates. Pelton soils have 18 to 25 percent clay in the particle-size control section.
GEOGRAPHIC SETTING: Logy soils are on flood plains and alluvial fans at elevations of 700 to 2,400 feet. These soils formed in alluvium. Slopes are 0 to 30 percent. They are in a climate with a mean annual precipitation of 7 to 12 inches, warm dry summers and cold moist winters. Average January temperature is 29 degrees F.; average July temperature is 73 degrees F.; and average annual temperature is 51 degrees F. Frost-free season is 130 to 180 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Cashmere, Cashmont, Conconully, Farrell, Heytou, Malott (T), Onyx, Peshastin, Quincy, Simcoe, Skaha, and Stubblefield soils and the competing Weirman and Yakima soils. Cashmere, Cashmont, Conconully, Farrell, and Malott soils are coarse-loamy. Heytou and Peshastin soils have secondary carbonates from 20 to 40 inches. Onyx soils lack coarse fragments and have a mollic epipedon more than 20 inches thick. Quincy soils are sandy throughout. Simcoe soils have an argillic horizon. Skaha soils are sandy-skeletal. Stubblefield soils are moderately deep to a duripan.
DRAINAGE AND PERMEABILITY: Well drained; slow runoff; moderate permeability.
USE AND VEGETATION: About half of this soil is irrigated cropland, the remaining is used for native pasture. Irrigated crops are hay and pasture and small grains. Native vegetation is big sagebrush, antelope bitterbrush, silky lupine, bluebunch wheatgrass, Sandberg bluegrass, needleandthread, arrowleaf balsamroot, common yarrow, and gray rabbitbrush.
DISTRIBUTION AND EXTENT: Central Washington. Series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Yakima County, Washington, 1970.
REMARKS: Diagnostic horizons and feature recognized in this soil are a mollic epipedon from the surface to 12 inches, a Bw horizon from 12 to 19 inches with an irregular decrease in organic carbon, and 55 percent coarse fragments in the particle-size control section (10 to 40 inches).