LOCATION CONCONULLY              WA

Established Series
Rev. CDL/SGR/TLA
01/2011

CONCONULLY SERIES

The Conconully series consists of moderately deep to dense glacial till, well drained soils that formed in mixed volcanic ash over glacial till. They are on ground moraines and foothills. Slope ranges from 0 to 65 percent. The mean annual air temperature is about 48 degrees F, and the mean annual precipitation is about 13 inches.

TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, mesic Vitrandic Haploxerolls

TYPICAL PEDON: Conconully very stony ashy loam - range. (Colors are for dry soil unless otherwise noted.)

A1--0 to 2 inches; dark grayish brown (10YR 4/2) very stony ashy loam, very dark brown (10YR 2/2) moist; weak coarse platy structure that separates to weak fine granular; soft, very friable, nonsticky and nonplastic; many roots; many fine tubular pores; 15 percent gravel, 10 percent cobbles and 10 percent stones; neutral (pH 6.8); abrupt smooth boundary. (1 to 2 inches thick)

A2--2 to 13 inches; dark grayish brown (10YR 4/2) stony ashy loam, very dark brown (10YR 2/2) moist; weak fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; many roots; many fine tubular pores; 10 percent gravel, 10 percent cobbles and 10 percent stones; neutral (pH 6.8); clear smooth boundary. (9 to 12 inches thick)

2Bw1--13 to 21 inches; brown (10YR 5/3) gravelly fine sandy loam, dark brown (10YR 3/3) moist; weak medium prismatic structure; soft, very friable, nonsticky and nonplastic; common roots; few fine tubular pores; 15 percent gravel and 5 percent cobbles; neutral (pH 6.7); clear smooth boundary. (6 to 10 inches thick)

2Bw2--21 to 33 inches; pale brown (10YR 6/3) gravelly sandy loam, brown (10YR 4/3) moist; weak medium prismatic structure; slightly hard, very friable, nonsticky and nonplastic; common roots; few fine tubular pores; 15 percent gravel and 5 percent cobbles; neutral (pH 7.0); clear smooth boundary. (10 to 16 inches thick)

2Cd--33 to 60 inches; light brownish gray (10YR 6/2) dense glacial till that crushes to gravelly sandy loam, dark grayish brown (10YR 4/2) moist; massive; 20 percent gravel and 10 percent cobbles; neutral (pH 6.7).

TYPE LOCATION: Okanogan County, Washington; 340 feet east and 300 feet south of the northwest corner of southwest 1/4, southwest 1/4 of sec. 23, T. 31 N., R. 22 E., (Latitude 48 degrees, 10 minutes, 03 seconds North, Longitude 120 degrees, 03 minutes, 18 seconds West).

RANGE IN CHARACTERISTICS:

Soil Moisture: These soils are usually moist but are dry for 90 to 105 consecutive days following the summer solstice; xeric soil moisture regime.

Soil Temperature: mean annual soil temperature is 47 to 53 degrees F.

Rock fragments: average 10 to 35 percent in the particle-size control section but may range from 5 to 50 percent in individual subhorizons.

Particle-size control section: 3 to 15 percent clay and having a base saturation by ammonium acetate of less than 75 percent in some part (ultic).

Depth to dense glacial till: 26 to 40 inches

Depth to bedrock: 45 to more than 60 inches

Vitrandic soil properties: an estimated moist bulk density of 1.10 to 1.50 g/cc, volcanic glass content of 20 to 40 percent, acid-oxalate extractable aluminum plus one-half of the acid-oxalate extractable iron of 0.15 to 0.40 percent, and 15-bar water retention of 5 to 12 percent for air dried samples.

Mollic epipedon thickness and thickness of vitrandic properties: 10 to 14 inches.

A horizon
Value: 4 or 5 dry, 2 or 3 moist
Chroma: 2 or 3 dry or moist
Texture (fine-earth): ashy fine sandy loam, ashy sandy loam, or ashy loam. It may be gravelly, stony, very stony, extremely stony or bouldery
Gravel: 5 to 35 percent
Cobbles and stones: 0 to 25 percent
Boulders: 0 to 2 percent
Reaction: moderately acid to neutral.

2Bw horizon
Value: 5 or 6 dry, 3 through 5 moist, and
Chroma: 3 or 4 moist or dry.
Texture (fine-earth): fine sandy loam, sandy loam, coarse sandy loam, or loam and is commonly gravelly
Rock fragments: 5 to 35 percent
Structure: weak prismatic and subangular blocky

2Cd horizon
Hue: 10YR or 2.5Y
Value: 5 through 7 dry, 3 through 6 moist
Chroma: 1 through 4, moist or dry
Texture (fine-earth): fine sandy loam, sandy loam, coarse sandy loam or loamy sand, and is gravelly
Rock Fragments: 15 to 35 percent
Reaction: neutral to slightly alkaline
Moist bulk density is 1.70 to 2.00 g/cc

COMPETING SERIES: These are Deno, Fanal, Phoebe, Safety, Stevens, and Uhlig series. Deno soils are deep to bedrock. Fanel, Phoebe and Uhlig soils are very deep. Safety soils are moderately deep to a paralithic contact. Stevens soils are dry 60 to 90 consecutive days following the summer solstice and have a 20 to 40 inch thick mollic epipedon.

GEOGRAPHIC SETTING: Conconully soils are on ground moraines and foothills. These soils formed in mixed volcanic ash over glacial till. Slopes are 0 to 65 percent. Elevation ranges from 1,200 to 4,000. The climate is characterized by warm, dry summers and cool, moist winters. The mean annual precipitation is 10 to 15 inches. The mean January temperature is about 25 degrees F, the mean July temperature is about 71 degrees F, and the mean annual air temperature is 46 to 50 degrees F. The frost-free season is 110 to 165 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Disautel, Ewall, Haley, Nespelem, Picard, Synarep, Timentwa soils. Disautel have secondary carbonates above the densic contact. Nespelem soils have a duripan. Synarep soils are very deep. Timentwa soils are deep and very deep to bedrock. Ewall soils are sandy. Haley soils are very deep. Picard soils are very deep.

DRAINAGE AND PERMEABILITY: Well drained; slow to rapid runoff; moderate over slow permeability.

USE AND VEGETATION: Nonirrigated cropland, livestock grazing, irrigated hay, pasture, and cropland. Native vegetation is Idaho fescue, bluebunch wheatgrass, Sandberg bluegrass, common yarrow, arrowleaf balsamroot, Wyeth eriogonum, silky lupine, antelope bitterbrush, and threetip sagebrush.

DISTRIBUTION AND EXTENT: North-central Washington; MLRA 6, 8, and 43A. The series is extensive.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon

SERIES ESTABLISHED: Okanogan County, Washington, 1972.

REMARKS: Diagnostic horizons and features recognized in this soil:
Mollic epipedon from 0 to 13 inches,
Cambic horizon from 13 to 33 inches.
Densic contact: 33 inches
Particle-size control section from 10 to 33 inches, averages 14 percent rock fragments and less than 18 percent clay:

ADDITIONAL DATA: Lab data available for this soil NSSL pedon number 90P1010, 84P0165, 69C0049, 69C0050, 90P0343.

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National Cooperative Soil Survey
U.S.A.