LOCATION DEECREE                 ID

Established Series
IRD KA/RGK/CBR
06/2019

DEECREE SERIES

Landscape--hills, alluvial plains
Landform--stream terraces
Slope--0 to 50 percent
Parent material--loess-influenced alluvium
Mean annual precipitation--about 300 mm
Mean annual air temperature--about 4.4 degrees C
Depth class--very deep
Drainage class--well drained
Soil moisture regime--aridic
Soil temperature regime--frigid

TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, frigid Aridic Calcixerolls

TYPICAL PEDON: Deecree gravelly silt loam (Colors are for dry soil unless otherwise noted.)

A--0 to 13 cm; grayish brown (10YR 5/2) gravelly silt loam, very dark grayish brown (10YR 3/2) moist; weak fine subangular blocky structure parting to moderate medium granular; soft, very friable, slightly sticky and slightly plastic; many medium, fine, and very fine roots; common very fine tubular pores; slightly effervescent; 20 percent gravel; slightly alkaline (pH 7.8); clear wavy boundary

Bk1--13 to 33 cm; brown (10YR 5/3) gravelly silt loam, very dark grayish brown (10YR 3/2) moist; weak medium and fine subangular blocky structure; soft, very friable, slightly sticky and slightly plastic; many medium, fine, and very fine roots; common very fine tubular pores; common calcium carbonate coatings on bottom of rock fragments; strongly effervescent (9 percent calcium carbonates); 15 percent gravel; slightly alkaline (pH 7.8); gradual wavy boundary

2Bk2--33 to 46 cm; very pale brown (10YR 8/3) extremely gravelly sandy loam, pale brown (10YR 6/3) moist; weak fine subangular blocky structure; soft, friable, slightly sticky and slightly plastic; few fine and very fine roots; few very fine tubular pores; common calcium carbonate coatings on rock fragments; violently effervescent (35 percent calcium carbonates); 60 percent gravel; moderately alkaline (pH 8.0); clear wavy boundary

2Bk3--46 to 74 cm; very pale brown (10YR 8/3) extremely gravelly sandy loam, very pale brown (10YR 7/3) moist; massive; slightly hard, friable, slightly sticky and slightly plastic; few very fine roots; few very fine tubular pores; common calcium carbonate coatings on rock fragments; violently effervescent (40 percent calcium carbonate); 60 percent gravel and 10 percent cobbles; moderately alkaline (pH 8.0); clear wavy boundary

2Bk4--74 to 150 cm; brownish yellow (10YR 6/6) extremely gravelly loamy coarse sand, yellowish brown (10YR 5/6) moist; massive; loose; few very fine roots; few very fine tubular pores; common calcium carbonate coatings on rock fragments; violently effervescent (40 percent calcium carbonates); 70 percent gravel and 15 percent cobbles; moderately alkaline (pH 8.4)

TYPE LOCATION: Clark County, Idaho; latitude 44.27014 degrees north, longitude 112.44094 west, datum WGS 84

RANGE IN CHARACTERISTICS:
Mean annual soil temperature--3.3 to 7.2 degrees C
Thickness of mollic epipedon--25 to 36 cm
Depth to calcic horizon--13 to 28 cm
Depth to lithologic discontinuity--30 to 91 cm

Particle-size control section (weighted averages)
*Clay content--6 to 17 percent
*Total rock fragment content--50 to 70 percent
*Calcium carbonate equivalent--30 to 40 percent

A horizon
Value--4 or 5 dry, 2 or 3 moist
Chroma--2 or 3 dry or moist
Clay content--5 to 9 percent
Gravel content--15 to 20 percent
Reaction--pH 7.4 to 7.8
Thickness--10 to 15 cm

Bk1 horizon
Value--4 or 5 dry, 2 or 3 moist
Chroma--2 or 3 dry or moist
Texture (less than 2-mm fraction)--silt loam, loam
Clay content--12 to 17 percent
Gravel content--10 to 20 percent
Calcium carbonate equivalent--10 to 35 percent
Reaction--pH 7.9 to 8.0
Thickness--15 to 23 cm

2Bk2 and 2Bk3 horizons
Value--6 to 8 dry, 4 to 7 moist
Chroma--3 to 6 dry or moist
Texture (less than 2-mm fraction)--sandy loam, loam
Clay content--5 to 17 percent
Total rock fragment content--35 to 85 percent
Gravel content--35 to 85 percent
Cobble content--0 to 20 percent
Calcium carbonate equivalent--10 to 35 percent
Reaction--pH 7.9 to 8.4
Thickness--13 to 46 cm

2Bk4 horizon
Value--5 to 7 dry, 4 to 6 moist
Chroma--5 or 6 dry or moist
Texture (less than 2-mm fraction)--sandy loam, loam
Clay content--2 to 8 percent
Total rock fragment content--60 to 85 percent
Gravel content--60 to 85 percent
Cobble content--0 to 20 percent
Calcium carbonate equivalent--30 to 40 percent
Reaction--pH 7.9 to 8.6

COMPETING SERIES:
Becreek--less than 30 percent calcium carbonates in particle-size control section
Denay--depth to secondary calcium carbonates more than 38 cm; no discontinuity
Eenreed, Grube--argillic horizon
Nirac, Rudeen--50 to 100 cm (moderately deep) to a lithic contact
Pamison--25 to 50 cm to a weakly cemented duripan
Wereld--100 to 150 cm (deep) to a lithic contact
Xine--50 to 100 cm (moderately deep) to a paralithic contact

GEOGRAPHIC SETTING:
Elevation--1580 to 2120 m
Mean annual precipitation--200 to 425 mm
Mean annual air temperature--2.2 to 6.1 degrees C
Frost-free period--70 to 95 days

GEOGRAPHICALLY ASSOCIATED SOILS: None listed

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Saturated hydraulic conductivity (Ksat)--10 to 200 um/sec

USE AND VEGETATION:
Major uses--rangeland, wildlife habitat
Potential natural vegetation--low sagebrush, bluebunch wheatgrass, Sandberg bluegrass, rabbitbrush

DISTRIBUTION AND EXTENT: Southeastern Idaho; MLRA 12; small extent

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

SERIES ESTABLISHED: Clark County, Idaho; 2018

REMARKS:
Diagnostic horizons and other features in this pedon
*Mollic epipedon--zone from the surface to a depth of 33 cm
*Calcic horizon--zone from 13 to 150 cm
*Particle-size control section--zone from 25 to 100 cm

Taxonomic version--Twelfth Edition, 2014

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National Cooperative Soil Survey
U.S.A.