LOCATION RICAFIED ID

Tentative Series
Rev. RJ/BAG/MPR
08/2014

RICAFIED SERIES

The Ricafied series consists of moderately deep, well drained soils that formed in colluvium and residuum from limestone and dolomite, with some loess influence. Ricafied soils are on mountain slopes, hillslopes, and ridges. Slope ranges from 15 to 70 percent. The mean annual precipitation is about 450 millimeters, and the mean annual air temperature is about 3 degrees C.

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

TYPICAL PEDON: Ricafied gravelly loam on a 45 percent south aspect in rangeland, at an elevation of 1955 meters. (Colors are for air-dry soil unless otherwise noted.)

A1--0 to 7 cm; brown (10YR 5/3) gravelly loam, dark brown (10YR 3/3) moist; moderate fine subangular blocky structure parting to weak fine granular; soft, very friable, nonsticky and nonplastic; many fine and few medium roots; common very fine and fine tubular and irregular pores; 25 percent gravel and 5 percent channers; slightly alkaline (pH 7.8); gradual wavy boundary

A2--7 to 18 cm; brown (10YR 5/3) very gravely loam, dark brown (10YR 3/3) moist; moderate and strong medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; many fine roots; few very fine and common fine irregular pores; 15 percent calcium carbonate equivalent; 30 percent gravel and 5 percent channers; strongly effervescent; moderately alkaline (pH 8.0); gradual wavy boundary

Bk1--18 to 28 cm; pale brown (10YR 6/3) gravelly silt loam, dark yellowish brown (10YR 3/4) moist; strong medium subangular blocky structure; hard, firm, slightly sticky and slightly plastic; few medium roots; few fine irregular pores; common (7 percent) secondary calcium carbonate concretions (less than 1 mm) on bottoms of rock fragments; 18 percent calcium carbonate equivalent; 20 percent gravel and 5 percent channers; violently effervescent; moderately alkaline (pH 8.2); clear wavy boundary

Bk2--28 to 87 cm; light yellowish brown (10YR 6/4) extremely channery silt loam, yellowish brown (10YR 5/4) moist; weak fine and medium subangular blocky structure; hard; firm; slightly sticky and slightly plastic; few medium roots; few fine irregular pores; common (12 percent) secondary calcium carbonate concretions (less than 1 mm) around rock fragments; 24 percent calcium carbonate equivalent; 10 percent gravel, 35 percent channers, and 25 percent flagstones; violently effervescent; moderately alkaline (pH 8.3); abrupt wavy

R--87 cm; fractured limestone

TYPE LOCATION: Caribou County, Idaho; about 10.6 kilometers west of Grace, Idaho; 95 meters north and 640 meters east of the southwest corner of section 35, T. 09 S., R. 39 E.; USGS Grace Power Plant 7.5 minute topographic quadrangle; Lat. 42 degrees 35 minutes 21 seconds N and Long. 111 degrees 51 minutes 36.1 seconds W, NAD83

RANGE IN CHARACTERISTICS:
Mean annual soil temperature - 3 to 6 degrees C
Mean annual summer soil temperature - 15 to 18 degrees C
Thickness of mollic epipedon - 18 to 40 cm
Depth to the calcic horizon - 18 to 40 cm
Depth to bedrock - 50 to 100 cm

Particle-size control section-
Clay content - 18 to 27 percent
Calcium carbonate equivalent - 15 to 40 percent
Rock fragments - 35 to 70 percent

A horizons
Value - 4 or 5 dry, 2 or 3 moist
Chroma - 2 or 3 dry or moist
Texture - Loam, silt loam
Rock fragments - 25 to 50 percent total; 10 to 40 percent gravel, 5 to 45 percent channers
Reaction - Slightly alkaline or moderately alkaline
Combined A horizon thickness - 18 to 40 cm

Bk horizons
Hue - 10YR or 2.5Y
Value - 5 to 7 dry, 3 to 5 moist
Chroma - 2 to 4 dry or moist
Texture - Loam, silt loam
Rock fragments - 35 to 80 percent total; 5 to 25 percent gravel, 5 to 45 percent channers, 0 to 35 percent flagstones
Effervescence - Strongly or violently effervescent
Reaction: - Slightly alkaline or moderately alkaline
Combined Bk horizon thickness - 32 to 82 cm

COMPETING SERIES: These are the Bezzant, Cedarhill, Dennot, Eaglecone, Georgecanyon, and Pyrenees series. Bezzant, Cedarhill, Dennot, Eaglecone, and Georgecanyon soils are very deep to bedrock. Pyrenees soils have less than 18 percent clay.

GEOGRAPHIC SETTING:
Landscape - Mountains and hills
Landform - Mountain slopes, hillslopes, ridges
Elevation - 1,550 to 2,450 meters
Slope - 15 to 70 percent
Parent material - Colluvium and residuum from limestone and dolomite with some loess influence
Mean annual temperature - 2 to 4 degrees C.
Mean annual precipitation - 400 to 500 millimeters
Frost free period - 60 to 90 days

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Cedarhill, Ireland, and Wursten series. Cedarhill soils are on the same landform positions and are very deep. Ireland soils are on similar landform positions and lack free carbonates within 18 cm. Wursten soils are on adjacent upper fan remnants and have a coarse-loamy particle size class.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class - Well drained
Saturated hydraulic conductivity - Moderately high or high

USE AND VEGETATION:
Major uses - Livestock grazing, watershed, and wildlife
Potential natural vegetation - curlleaf mountain mahogany, mountain big sagebrush, bluebunch wheatgrass

DISTRIBUTION AND EXTENT: Southeastern Idaho; MLRA 13; small extent

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

SERIES PROPOSED: Caribou County, Idaho, 2010; the name is coined

REMARKS:
Soil temperature regime - Frigid
Soil moisture regime - Xeric
Mollic epipedon - 0 to 18 cm
Calcic horizon - 18 to 87 cm
Particle-size control section - 25 to 87 cm
Lithic contact - 87 cm

National Cooperative Soil Survey
U.S.A.