LOCATION MAGIC IDEstablished Series
TAXONOMIC CLASS: Fine, smectitic, frigid Vertic Haploxerepts
TYPICAL PEDON: Magic very stony silty clay - range. (Colors are for dry soil unless otherwise noted.)
A1--0 to 3 inches; brown (10YR 5/3) very stony silty clay, dark brown (10YR 4/3) moist; strong very fine granular structure; soft, very friable, sticky and plastic; few fine and medium roots; many very fine interstitial pores; neutral (pH 7.2); clear smooth boundary. (2 to 5 inches thick)
B21--3 to 6 inches; brown (7.5YR 5/2) silty clay, dark brown (7.5YR 4/2) moist; moderate thick platy structure parting to moderate fine and medium angular blocky; very hard, very firm, very sticky and very plastic; few very fine and fine roots; few fine tubular pores; prisms tilted to 60 degree angle from vertical; mildly alkaline (pH 7.8); clear wavy boundary. (2 to 5 inches thick)
B22--6 to 16 inches; brown (7.5YR 5/2) silty clay, dark brown (7.5YR 4/2) moist; weak very coarse prismatic structure parting to moderate fine and medium angular blocky; very hard, very firm, very sticky and very plastic; few very fine, fine, medium and coarse roots; few fine tubular pores; moderately alkaline (pH 7.8); clear wavy boundary. (6 to 12 inches thick)
B31--16 to 26 inches; pinkish gray (7.5YR 6/2) silty clay, brown (7.5YR 4/2) moist; weak very coarse prismatic structure that parts to moderate fine and medium angular blocky; very hard, very firm, very sticky and very plastic; few very fine, fine, medium and coarse roots; few fine tubular pores; moderately alkaline (pH 8.0); clear wavy boundary. (8 to 12 inches thick)
B32--26 to 33 inches; pinkish gray (7.5YR 6/2) silty clay, brown (7.5YR 4/2) moist; moderate fine and medium angular blocky structure; hard, firm, sticky and plastic; few very fine and fine roots; few fine tubular pores; slightly effervescent; moderately alkaline (pH 8.2); clear wavy boundary. (6 to 8 inches thick)
B33--33 to 35 inches; pinkish gray (7.5YR 6/2) silty clay loam, brown (7.5YR 4/2) moist; strong fine and medium angular blocky structure; hard, firm, sticky and plastic; few very fine roots; strongly effervescent veins and coatings on faces of peds; moderately alkaline (pH 8.2); abrupt wavy boundary. (1 to 3 inches thick)
R--35 inches; bedrock.
TYPE LOCATION: Camas County, Idaho; about 9 miles east and 5 miles south of Fairfield; 1,650 feet west and 250 feet south of the northeast corner of sec. 7, T. 2 S., R. 16 E.
RANGE IN CHARACTERISTICS: Depth to bedrock and thickness of the solum are 25 to 40 inches. The soil between depths of 4 and 12 inches is moist in some part in October or early November and remains moist until July. Mean annual temperature is 41 to 45 degrees F., and the mean summer soil temperature is 60 degrees to 65 degrees F.
The profile is neutral to moderately alkaline. The soil has cracks that are 1 to 4 cm. wide and 50 to 60 cm. deep in the summer and autumn of most years. The upper part of the profile has 0 to 3 percent stones, 3 to 5 percent cobbles and 3 to 10 percent pebbles.
The A horizon has hue of 7.5YR or 10YR, value of 5 or 6 dry, and chroma of 2 or 3.
The B horizon has value of 5 or 6 dry and chroma of 2 or 3. It is clay, silty clay, or silty clay loam. This horizon is weakly to strongly effervescent in the lower part.
COMPETING SERIES: This is the Yutrue series in another family. Yutrue soils have a mean annual soil temperature above 47 degrees F. and are more than 40 inches deep to bedrock.
GEOGRAPHIC SETTING: Magic soils are on lava plains and have slopes of 0 to 8 percent. Elevations are 4,800 to 5,500 feet. The soils formed in residuum weathered from basalt. They formed in a Humid continental climate, cool summers (Trewartha's modified Koppen system) having dry summers and cold moist winters. Mean annual precipitation is 12 to 16 inches. Mean January temperature is 15 degrees F.; mean July temperature is 66 degrees F.; and mean annual temperature is 39 to 43 degrees F. Frost-free period is about 70 to 100 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Gaib, Harahill, Laurentzen, Kevanton, Manard, and Polecreek soils. Gaib and Laurentzen soils have a moderately fine textured B2t horizon. Harahill soils have less than 35 percent clay throughout. Kevanton soils have bedrock at depths of 44 to 60 or more inches. Manard and Polecreek soils have medium textured surfaces and fine textured B2t horizons.
DRAINAGE AND PERMEABILITY: Well drained; slow to medium runoff; very slow permeability.
USE AND VEGETATION: Mostly rangeland, some irrigated and dry-farmed hay and small grain. Vegetation is alkali sagebrush, Idaho fescue, and Sandberg bluegrass.
DISTRIBUTION AND EXTENT: South-central Idaho. The series is inextensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Camas County, Idaho, 1977.
OSED scanned by SSQA. Last revised by state on 4/77.