LOCATION RENSLOW                 WA+ID

Established Series
Rev. DDS/TER/TLA
09/2019

RENSLOW SERIES

Landscape--plateaus, hills
Landform--broad ridges, terraces, hillslopes
Slope--0 to 40 percent
Parent material--loess
Mean annual precipitation--about 280 mm
Mean annual air temperature--about 9 degrees C
Depth class--deep, very deep
Drainage class--well drained
Soil moisture regime--aridic (bordering xeric)
Soil temperature regime--mesic
Soil moisture subclass--xeric

TAXONOMIC CLASS: Coarse-silty, mixed, superactive, mesic Calciargidic Argixerolls

TYPICAL PEDON: Renslow silt loam, cultivated

Ap--0 to 25 cm; silt loam, grayish brown (10YR 5/2) dry, very dark grayish brown (10YR 3/2) moist; weak fine and medium granular structure; slightly hard, very friable, slightly sticky and slightly plastic; common fine roots; few fine tubular pores; slightly alkaline (pH 7.4); abrupt smooth boundary

BA--25 to 46 cm; silt loam, brown (10YR 5/3) dry, brown (10YR 4/3) moist; weak medium and coarse prismatic structure; slightly hard, very friable, slightly sticky and slightly plastic; common fine roots; common fine tubular pores; slightly alkaline (pH 7.6); clear wavy boundary

Bt--46 to 71 cm; silt loam, brown (10YR 5/3) dry, brown (10YR 4/3) moist; thin organic staining on surface of peds; moderate medium prismatic structure parting to moderate fine subangular blocky; hard, friable, slightly sticky and slightly plastic; thin patchy clay films on peds; common fine roots; many fine tubular pores; moderately alkaline (pH 8.2); clear wavy boundary

Bk1--71 to 97 cm; silt loam, pale brown (10YR 6/3) dry, brown (10YR 5/3) moist; weak medium subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; few fine roots; common fine tubular pores; carbonate material in root channels and matrix; strongly effervescent; strongly alkaline (pH 8.6); clear wavy boundary

Bk2--97 to 117 cm; silt loam, pale brown (10YR 6/3) dry, brown (10YR 4/3) moist; massive; slightly hard, very friable, slightly sticky and slightly plastic; few fine roots; common fine tubular pores; carbonate material in old root channels and matrix; slightly effervescent; strongly alkaline (pH 8.8); abrupt wavy boundary

Bk3--117 to 155 cm; silt loam, light yellowish brown (10YR 6/4) dry, brown (10YR 4/3) moist; massive; hard, friable, slightly sticky and slightly plastic; few fine roots; many fine tubular pores; lime coating in pores and old root channels; slightly effervescent; strongly alkaline (pH 8.8)

TYPE LOCATION: Lincoln County, Washington, about 13 km south of Wilbur; about 95 m east and 50 m north of the southwest corner of section 23, T. 25 N., R. 32 E.; latitude 47.6419499, longitude -118.7629595, datum WGS 84 (coordinates estimated from section, township, and range)

RANGE IN CHARACTERISTICS:
Mean annual soil temperature--8 to 12 degrees C
Soil moisture--dry between depths of 10 and 30 cm more than one-half the time when the soil temperature is higher than 5 degrees C (about 105 to 120 consecutive days)
Depth to a duripan or bedrock--100 to 150 cm or more
Depth to secondary carbonates--50 to 112 cm
Particle-size control section--10 to 18 percent clay; averages less than 15 percent fine sand or coarser material
Assumed base saturation (by sum)--more than 75 percent throughout

Ap horizon
Value--4 or 5 dry, 2 or 3 moist
Chroma--2 to 4 dry, 2 or 3 moist
Reaction--6.6 to 7.8
Thickness--13 to 33 cm

BA horizon
Thickness--0 to 56 cm

Bt horizon
Value--4 to 6 dry, 3 or 4 moist
Chroma--3 or 4 moist, 2 to 4 dry
Structure--prismatic, subangular blocky
Reaction--6.1 to 9.0
Thickness--18 to 30 cm

Bk horizon
Value--5 to 7 dry, 3 to 5 moist
Chroma--3 or 4 moist, 2 to 4 dry
Texture of fine-earth fraction--silt loam, very fine sandy loam, silt
Rock fragment content--0 to 35 percent
Structure--blocky, massive
Reaction--7.4 to 9.0
Combined thickness--greater than 70 cm

COMPETING SERIES: None

GEOGRAPHIC SETTING:
Elevation--275 to 850 m in Washington, 1475 to 1625 m in Idaho
Climate--semiarid
Mean annual precipitation--230 to 330 mm
Mean January air temperature--about -3 degrees C
Mean July air temperature--about 21 degrees C
Mean annual air temperature--about 7 to 11 degrees C
Frost-free season--130 to 190 days in Washington, 90 to 105 days in Idaho

GEOGRAPHICALLY ASSOCIATED SOILS:
Bakeoven--10 to 25 cm (very shallow) to a lithic contact (basalt); on plateaus, hillslopes, and canyon slopes
Lickskillet--30 to 50 cm (shallow) to a lithic contact (basalt); on canyon slopes
Ralls--fine-loamy particle-size class; on hillslopes
Selah, Willis--50 to 100 cm (moderately deep) to a duripan; on dissected upland terraces
Simcoe, Zen--50 to 100 cm (moderately deep) to a lithic contact (basalt); on plateaus

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Saturated hydraulic conductivity (Ksat)--moderately high

USE AND VEGETATION:
Use--crop production, livestock grazing
Nonirrigated crops--winter wheat, spring wheat, and barley in a summer fallow system; forage crops
Irrigated crops--corn, small grain, vegetables, fruit
Native vegetation--bluebunch wheatgrass, Idaho fescue, Sandberg bluegrass, big sagebrush

DISTRIBUTION AND EXTENT: Eastern Washington and southwestern Idaho; MLRA 8; moderate extent

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Portland, Oregon

SERIES ESTABLISHED: Kittitas County, Washington; 1939

REMARKS:
Diagnostic horizon and other features recognized in this pedon
*Mollic epipedon--zone from the surface to a depth of 25 cm
*Argillic horizon--zone from 46 to 71 cm
*Secondary lime accumulation--zone from 71 to 155 cm; assumed calcium carbonate equivalent of less than 15 percent

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National Cooperative Soil Survey
U.S.A.