LOCATION LESLIECREEK AZEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, thermic Torrifluventic Haplustolls
TYPICAL PEDON: Lesliecreek loam - rangeland. (Colors are for dry soil unless otherwise noted.)
A--0 to 4 inches; dark brown (10YR 3/3) loam, very dark grayish brown (10YR 3/2) moist; moderate very fine and fine subangular blocky structure; soft, very friable, slightly sticky and slightly plastic; many very fine and fine roots; common very fine and fine interstitial pores; noneffervescent; slightly alkaline (pH 7.8); clear smooth boundary. (2 to 8 inches thick)
Bk1--4 to 12 inches; grayish brown (10YR 5/2) clay loam, very dark grayish brown (10YR 3/2) moist; moderate very fine and fine subangular blocky structure; slightly hard, friable, moderately sticky and moderately plastic; many very fine and fine roots; many very fine and fine tubular pores; common soft fine calcium carbonate masses; common calcium carbonate filaments; slightly effervescent, 3 percent calcium carbonate equivalent; moderately alkaline (pH 8.0); abrupt smooth boundary.
Bk2--12 to 32 inches; grayish brown (10YR 5/2) loam, dark yellowish brown (10YR 3/4) moist; massive; soft, very friable, slightly sticky and moderately plastic; common very fine and fine and few medium roots; many fine and common medium tubular pores; many soft fine calcium carbonate masses; many calcium carbonate filaments; strongly effervescent, 6 percent calcium carbonate equivalent; moderately alkaline (pH 8.0); abrupt smooth boundary.
Bk3--32 to 50 inches; brown (10YR 5/3) silty clay loam, dark brown (7.5YR 3/3) moist; moderate fine and medium subangular blocky structure; soft, friable, very sticky and very plastic; common very fine and fine and few medium roots; many very fine and fine and few medium tubular pores; many soft fine calcium carbonate masses; many calcium carbonate filaments; common distinct calcium carbonate coatings on rock fragments; 10 percent gravel; violently effervescent, 5.5 percent calcium carbonate equivalent; moderately alkaline (pH 8.0); clear smooth boundary.
Bk4--50 to 60 inches; brown (10YR 5/3) clay loam, dark brown (7.5YR 3/3) moist; moderate fine and medium subangular blocky structure; soft, friable, very sticky and very plastic; common very fine and medium roots; many very fine and fine tubular pores; many soft fine calcium carbonate masses; many calcium carbonate filaments; common distinct calcium carbonate coatings on rock fragments; 5 percent gravel; violently effervescent, 5.5 percent calcium carbonate equivalent; moderately alkaline (pH 8.0). (Combined thickness of the Bk horizons is 52 to 58 inches thick)
TYPE LOCATION: Cochise County, Arizona; located about 2,400 feet north and 1,400 feet west of the southeast corner section 10, Township 20 S., Range 28 E.; Bruno Peak topography map; latitude 31 degrees, 42 minutes, 20 seconds North and longitude 109 degrees, 28 minutes, 10 seconds West.
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. Aridic Ustic soil moisture regime.
Soil Temperature: 59 to 64 degrees F.
Rock fragments: less than 20 percent gravel in any one horizon
Clay content: 18 to 35 percent in the control section
Organic matter: 1 to 3 percent
Reaction: slightly alkaline to moderately alkaline
A horizon
Hue: 7.5YR, 10YR
Value: 3 through 5 dry, 2 or 3 moist
Chroma: 1 through 3, dry or moist
Texture: fine sandy loam, loam, silt loam
Bk horizon
Hue: 7.5YR, 10YR
Value: 3 through 5 dry, 2 through 4 moist
Chroma: 1 through 4, dry or moist
Texture: loam, clay loam, silty clay loam
Calcium carbonate equivalent: 3 to 10 percent
COMPETING SERIES: These are the Sprone (TX) and Toyah () series. Sprone soils formed in loamy alluvial sediments derived mainly from the Blackwater Draw Formation of Pleistocene age and Ogallala Formation of Miocene-Pliocene age and are on the Southern High Plains (MLRA 77) and are more moist in May and June. Toyah soils are drier with mean annual precipitation of 10 to 16 inches and have hues redder than 7.5YR.
GEOGRAPHIC SETTING: The Lesliecreek soils are in the Chihuahuan desert on flood plains and alluvial fans at elevations of 4,600 to 6,200 feet. Slope ranges from 0 to 10 percent. These soils formed from mixed alluvium. The mean annual precipitation is 16 to 20 inches and occurs as thunderstorms during July to September and as gentle rains during December and January. The mean annual air temperature is 57 to 62 degrees F. The frost-free period is 160 to 210 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Blacktail, Pyeatt, Castledome, Denab, Cazador and Terrarossa soils. Blacktail and Terrarossa soils have clay content greater than 35 percent and are on fan terraces or hills. Cazador soils have more than 35 percent clay. Pyeatt soils have less than 18 percent clay. Castledome and Denab are shallow to tuff.
DRAINAGE AND PERMEABILITY: Well drained; slow to medium runoff; moderately slow permeability.
USE AND VEGETATION: Used for livestock grazing and wildlife habitat. Vegetation includes blue grama, giant sacaton, vine mesquite, cane beardgrass, creeping muhly, and sideoats grama.
DISTRIBUTION AND EXTENT: Southeastern Arizona portion of the Chihuahuan desert. MLRA is 41. Lesliecreek soils are of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona
SERIES ESTABLISHED: Cochise County, Arizona; Soil Survey of Cochise County, Arizona, Douglas-Tombstone Part; 2000.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - The zone from 0 to 12 inches (A and Bk1 horizons)
Torrifluventic feature - Color changes and stratification infer irregular decrease of organic matter.
Soil Taxonomy Second Edition, 1999