LOCATION ANEZUL AZEstablished Series
TAXONOMIC CLASS: Clayey, smectitic, mesic Lithic Argiustolls
TYPICAL PEDON: Anezul gravelly clay loam, on a 2 percent slope in a rangeland savanna. (Colors are for dry soil unless otherwise noted.) The surface is covered by about 8 percent gravel and 2 percent cobbles.
A--0 to 3 inches; brown (7.5YR 4/3) gravelly clay loam, dark brown (7.5YR 3/2), moist; moderate fine subangular blocky parting to moderate fine and medium granular structure; slightly hard, very friable, moderately sticky and moderately plastic; many very fine and fine, and few medium roots; many very fine and fine pores; 12 percent gravel and 5 percent cobbles; noneffervescent; neutral (pH 7.2); clear wavy boundary. (1 to 4 inches thick)
Bt--3 to 16 inches; dark reddish brown (5YR 3/3) gravelly clay, dark reddish brown (5YR 3/3), moist; moderate medium prismatic parting to strong fine and medium angular blocky structure; extremely hard, extremely firm, very sticky and very plastic; common very fine and fine, and few medium roots; many very fine and fine pores; many distinct pressure faces; many prominent clay films on rock fragments; 15 percent gravel and 5 percent cobbles; noneffervescent; neutral (pH 7.2); very abrupt wavy boundary. (5 to 18 inches thick)
R--16 inches; andesite bedrock.
TYPE LOCATION: Graham County, Arizona; about 2,390 feet south and 50 feet east of the northwest corner of sec. 10, T. 1 S., R. 26 E; Topographic quadrangle: Point Of Pines East, Arizona; latitude: 33 degrees, 21 minutes, 38.9 seconds N; longitude: 109 degrees, 40 minutes, 28.3 seconds W; NAD 83.
RANGE IN CHARACTERISTICS:
Soil Moisture: Intermittently moist in some part of the soil moisture control section during July-September and December-February. Driest during May and June. Typic ustic soil moisture regime.
Particle-size control section (weighted average)
Clay content: 35 to 60 percent
Rock Fragments: 5 to 35 percent
Depth to bedrock: 7 to 20 inches
Surface fragments: 5 to 50 percent
Effervescence: none to slight
Reaction: slightly acid to slightly alkaline (pH 6.1-7.8)
A horizon
Hue: 5YR, 7.5YR, 10YR
Value: 3 to 5 dry, 2 to 3 moist
Chroma: 2 to 3, dry or moist
Texture: loam, clay loam
Clay content: 20 to 40 percent
Rock fragments: 1 to 40 percent
Bt horizon
Hue: 5YR, 7.5YR
Value: 3 to 5 dry, 2 to 4 moist
Chroma: 2 to 4, dry or moist
Texture: clay loam, clay
Clay content: 35 to 60 percent
Rock fragments: 1 to 35 percent
R horizon
Volcanic rock such as andesite, basalt, rhyolite, tuff, and volcanic breccia
COMPETING SERIES: This is the Lavina(MT) series. Lavina soils have hues of 10YR or 2.5Y in the argillic horizon and overlie hard sandstone. These soils are moist in the soil moisture control section during may and June and occur in the Western Great Plains.
GEOGRAPHIC SETTING: Anezul soils formed in alluvium, colluvium, or residuum derived from volcanic rock such as andesite, basalt, rhyolite, tuff and volcanic breccia. They occur on mountains, hills, and plateaus. Slope is 1 to 40 percent. Mean annual air temperature is 45 to 57 degrees F. Mean annual precipitation is 18 to 24 inches and falls mainly during July-September and December-February and is driest during May and June. The frost-free period is 100 to 180 days. The elevation is 5,800 to 7,200 feet.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Brolliar and
Dedal series.
Brolliar soils occur on similar positions and are moderately deep to basalt. Dedal soils occur on similar positions and average more than 35 percent coarse fragments in the particle-size control section.
DRAINAGE AND PERMEABILITY: Well drained; runoff is medium on less than 5 percent slopes, high on 5 to 15 percent slopes, and very high on more than 15 percent slopes; slow or very slow permeability.
USE AND VEGETATION: These soils are used for livestock grazing, fuelwood production, and wildlife habitat. The present vegetation is blue grama, sideoats grama, and muttongrass with alligator juniper, pinyon pine, and some ponderosa pine.
DISTRIBUTION AND EXTENT: Central Arizona; LRR D; MLRA 38; these soils are moderately extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona
SERIES ESTABLISHED: San Carlos Indian Reservation, AZ; Parts of Gila and Graham Counties, (AZ675); 2009.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - the zone from 0 to 16 inches (A and Bt horizons)
Argillic horizon - the zone from 3 to 16 inches (Bt horizon)
Lithic contact - the boundary at 16 inches (R horizon)
Classified according to Soil Taxonomy, Second Edition, 1999; Keys to Soil Taxonomy, Tenth Edition, 2006.