LOCATION WAYCUP IDEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, mesic Xeric Haplocalcids
TYPICAL PEDON: Waycup extremely stony loam, range. (Colors are for dry soil unless otherwise noted.)
A1--0 to 3 inches; light brownish gray (10YR 6/2) extremely stony loam, very dark grayish brown (10YR 3/2) moist; moderate very thin platy structure that parts to very weak very fine granular structure; soft, very friable, slightly sticky and slightly plastic; many very fine and fine roots; many fine vesicular pores; slightly calcareous; moderately alkaline (pH 8.1); abrupt smooth boundary. (1 to 4 inches thick)
AB--3 to 9 inches; light brownish gray (10YR 6/2) extremely stony loam, very dark grayish brown (10YR 3/2) moist; very weak coarse subangular blocky structure that parts to very weak very fine granular structure; slightly hard, very friable, slightly sticky and slightly plastic; many very fine and fine tubular pores; slightly calcareous; rock fragments slightly lime coated on lower side; moderately alkaline (pH 8.2); clear smooth boundary. (3 to 7 inches thick)
B2--9 to 14 inches; light brownish gray (10YR 6/2) extremely stony loam, dark grayish brown (10YR 4/2) moist; weak medium prismatic structure that parts to weak fine and medium subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; many very fine and fine and few medium and coarse roots; many very fine and fine tubular pores; moderately calcareous; rock fragments moderately lime coated on lower side; moderately alkaline (pH 8.2); clear wavy boundary. (3 to 8 inches thick)
C1ca--14 to 22 inches; pale brown (10YR 6/3) extremely stony loam, brown (10YR 4/3) moist; very weak medium subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; many very fine and fine roots; many very fine tubular pores; strongly calcareous; rock fragments moderately lime coated on lower side; moderately alkaline (pH 8.4); clear wavy boundary. (6 to 10 inches thick)
C2ca--22 to 27 inches; very pale brown (10YR 7/3) extremely stony loam, brown (10YR 5/3) moist; very weak medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common very fine and fine roots; many very fine tubular pores; strongly calcareous and many large splotches of lime material; rock fragments thickly coated with lime on lower side; strongly alkaline (pH 8.8); clear wavy boundary. (4 to 10 inches thick)
C3ca--27 to 38 inches; white (10YR 8/2) extremely stony loam, pale brown (10YR 6/3) moist; massive; hard, friable, slightly sticky and slightly plastic; common very fine and fine roots; common very fine tubular pores; strong;y calcareous; rock fragments thickly coated on lower side; very strongly alkaline (pH 9.1); clear wavy boundary. (7 to 18 inches thick)
C4ca--38 to 51 inches; white (10YR 8/2) very gravelly loam, pale brown (10YR 6/3) moist; massive; slightly hard, friable, nonsticky and nonplastic; common fine tubular pores; about 70 percent angular basalt fragments ranging from gravel to stone size; fragments thickly lime coated; moderately alkaline (pH 8.2); abrupt broken boundary. (2 to 20 inches thick)
R--51 to 60 inches; fractured basalt bedrock; lime coated in cracks.
TYPE LOCATION: Power County, Idaho; NW1/4 SE1/4 SW1/4 section 28, T.7S., R.33E.; 32 percent westerly slope.
RANGE IN CHARACTERISTICS: The mean annual soil temperature ranges from 47 to 58 degrees F. The soils are usually dry and are dry between depths of 4 and 12 inches for a continuous period of about 70 to 85 days in the late summer. The 10 to 40 inch control section is dominantly medium textured and averages 35 to 50 percent rock fragments. Depth to the calcic horizon is 12 to 20 inches. Bedrock below 40 and above 60 inches is common. The average organic matter content in the surface 15 inches is about 1 to 2 percent. If the upper 7 inches are mixed, the value is 5 to 6.5 dry and 3 to 4.5 moist; however, the value are not both darker than 5.5 dry and 3.5 moist. The chroma is commonly 2, but may be 3. The hue of the entire soil is generally 10YR but is 2.5Y in some pedons. The A1 horizon ranges from moderate or weak platy to weak subangular blocky or weak very fine granular structure. Where mixed to 7 inches, the Ap horizon is slightly or moderately calcareous, but the upper few inches of some undisturbed pedons are noncalcareous. The B or cambic horizon is light brownish gray or pale brown dry and very dark grayish brown, dark grayish brown, or brown moist.
It has weak prismatic or weak subangular blocky structure. The depth to the Cca horizon ranges from 11 to 20 inches. The Cca horizon contains 15 to 40 percent carbonates and is moderately to very strongly alkaline.
COMPETING SERIES AND THEIR DIFFERENTIAE: These are the Hiko Peak, Hondoho, Portino, Portneuf, Rudeen, Sanpete, and Siri series. Hiko Peak soils have calcic horizons at depths of 7 to 12 inches. Hondoho and Rudeen soils have mollic epipedons. Portino and Portneuf soils have less than 35 percent fragments in the control section. Sanpete soils have more than 50 percent rock fragments, lack cambic horizons, and have more than 40 percent calcium carbonate equivalent in the Cca horizon. Siri soils have mean annual temperature colder than 47 degrees F.
GEOGRAPHIC SETTING: The soils are on undulating to very steep uplands and footslopes at elevations of 2,000 to 5,200 feet. Slopes range from 0 to 60 percent. The soils formed mostly in colluvium and local alluvium from loessial and basaltic sources. The semiarid climate has mean annual precipitation of 8 to 12 inches, including 1 to 4 feet of snowfall, and an average frost free season of 100 to 150 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Hondoho, Portino, Portneuf, and Rudeen soils and the Trevino soils. Trevino soils have basalt bedrock at a depth of 10 to 20 inches.
DRAINAGE AND PERMEABILITY: Well drained; medium to rapid runoff; mpoderate permeability.
USE AND VEGETATION: Used mostly for range. The principal native plants are big sagebrush, bluebunch wheatgrasses, Sandberg bluegrass, Nevada bluegrass, cheatgrass, and in places, needlegrass, Indian ricegrass, phlox, juniper, snakeweed, three tip sagebrush, Russian thistle, wild mustard, rabbitbrush, and/or prickly oear.
DISTRIBUTION AND EXTENT: Moderatel;y extensive in southern Idha and adjacent areas.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Power County, Idaho, 1972.
REMARKS: The soils were classified formerly as Calcisols.