LOCATION MANARD ID+NVEstablished Series
TAXONOMIC CLASS: Fine, smectitic, frigid Typic Durixerolls
TYPICAL PEDON: Manard very stony silt loam, rangeland. (Colors are for dry soil unless otherwise noted.)
A1--0 to 3 inches; grayish brown (10YR 5/2) very stony silt loam, very dark grayish brown (10YR 3/2) moist; moderate thin and very thin platy structure parting to moderate very fine granular; soft, very
friable, slightly sticky and slightly plastic; many very fine and fine roots; many fine interstitial pores; 5 percent cobbles and 1 percent stones; slightly acid (pH 6.3); clear smooth boundary. (2 to 4 inches thick)
A2--3 to 9 inches; grayish brown (10YR 5/2) very stony silty clay loam, dark brown (10YR 3/3) moist; moderate medium angular blocky
structure parting to strong fine granular; hard, friable, slightly
sticky and slightly plastic; common very fine and fine, few medium
roots; many fine tubular pores; 5 percent cobbles and 1 percent stones;
slightly acid (pH 6.3); clear wavy boundary. (4 to 8 inches thick)
Bt1--9 to 18 inches; pale brown (10YR 6/3) silty clay loam, dark
brown (10YR 4/3) moist; weak medium prismatic structure parting to
moderate very fine and fine angular blocky; very hard, firm, sticky and
plastic; common very fine and fine, few medium roots; common fine
tubular pores; many moderately thick clay films on all faces of peds; common uncoated sand and silt grains on the vertical faces of peds; 5 percent cobbles and 1 percent stones; slightly acid (pH 6.4); abrupt wavy boundary. (7 to 12 inches thick)
Bt2--18 to 26 inches; light yellowish brown (10YR 6/4) silty clay, dark brown (10YR 4/3) moist; strong medium prismatic structure parting to strong medium angular blocky; very hard, very firm, very sticky and very plastic; common very fine roots; common fine tubular pores;
continuous moderately thick clay films on faces of peds; 3 to 5 percent
angular cobbles and 5 percent stones; mildly alkaline (pH 7.6); abrupt wavy boundary. (4 to 10 inches thick)
Bqkm--26 to 28 inches; white (10YR 8/1) silica and lime cemented
hardpan with strong thin plates; very hard, very firm; weakly
effervescent; mildly alkaline (pH 7.6); abrupt wavy boundary. (.75 to 4 inches thick)
R--28 inches; bedrock.
TYPE LOCATION: Camas County, Idaho; about 8 miles east and 4.75 miles south of Fairfield; 1,300 feet west and 2,000 feet north of the
southeast corner of sec. 2, T. 2 S., R. 15 E.
RANGE IN CHARACTERISTICS:
Soil moisture - usually moist but is dry for 50 to 70 consecutive days in the summer and autumn
Mollic epipedon thickness - 7 to 11 inches thick
Depth to bedrock - 20 to 38 inches
Average annual soil temperature - 42 to 47 degrees F.
Depth to duripan - 20 to 37 inches
Reaction - slightly acid to mildly alkaline
BA and Btk horizons are present in some pedons
A horizon
Value - 4 or 5 dry, 2 or 3 moist
Chroma - 2 or 3 dry or moist
Bt horizon
Hue - 10YR through 5YR
Value - 5 or 6 dry, 3 or 4 moist
Chroma - 2 through 4 dry or moist
Texture - SICL, CL, C, or SIC
Rock fragment content - 0 to 25 percent
Clay content - 35 to 60 percent
Bqkm horizon
Value - 6 through 8 dry
Chroma - 1 through 3 dry
COMPETING SERIES: These are the Budlewis (T), Forvic (T), Hatpeak,
Peevywell, and Oshone series. Budlewis soils have a calcic horizon
above the duripan and a 10 to 14 inch mollic epipedon. Forvic soils have a 20 to 30 inch mollic epipedon. Hatpeak, Peevywell, and Oshone soils are more than 40 inches deep to bedrock.
GEOGRAPHIC SETTING: Manard soils are on basalt plains and plateaus and
have slopes of 0 to 15 percent. The soils formed in residuum and
colluvium from basalt and welded tuff. Elevations range from 4,450 to 6,300 feet. The average annual precipitation ranges from 12 to 16
inches and the average annual temperature is 40 to 45 degrees F. The frost-free period is about 70 to 110 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Gaib, Goodington,
Harahill, Kevanton, Laurentzen, Magic, and Polecreek soils. Gaib and Polecreek soils are 10 to 20 inches to bedrock. Harahill soils have a fine-loamy B2 horizon. Goodington, Kevanton, and Laurentzen soils are more than 40 inches deep to bedrock. Magic soils are clayey
throughout. Goodington, Harahill, Kevanton, Laurentzen, Magic, and
Polecreek soils occur on basalt plains. Gaib soils are on foothills and mountains.
DRAINAGE AND PERMEABILITY: Well drained; slow to medium runoff; very slow permeability.
USE AND VEGETATION: Used mainly for range, but hay and small grain are
grown in some areas. Vegetation is alkali sagebrush, Sandberg
bluegrass, squirreltail, and Idaho fescue.
DISTRIBUTION AND EXTENT: Southwestern and south-central Idaho. The soils are moderately extensive.
SERIES ESTABLISHED: Camas County, Idaho, 1977.
REMARKS: Diagnostic horizon or features recognized in this pedon are:
Mollic epipedon - the zone from the surface of the soil to a depth of approximately 9 inches (A1 and A2 horizons)
Argillic horizon - the zone from approximately 9 to 26 inches (Bt1 and Bt2 horizons)
Typic Durixerolls feature - an indurated duripan from approximately 26 to 28 inches.
Lithic contact - bedrock at about 28 inches.