LOCATION TURKEYTRACK AZEstablished Series
TAXONOMIC CLASS: Fine, smectitic, mesic Vertic Paleustolls
TYPICAL PEDON: Turkeytrack gravelly loam - woodland. (Colors are for dry soil unless otherwise noted).
Oi--0 to 1 inches; recent and slightly decomposed pine litter.
AE--1 to 3 inches; light brown (7.5YR 6/4) and brown (7.5YR 5/4) gravelly loam, dark brown (7.5YR 3/3) moist; moderate thick platy structure parting to weak fine granular; soft, very friable, slightly sticky and slightly plastic; many very fine roots; many very fine irregular pores; 15 percent fine gravel as surface lag; noneffervescent; neutral (pH 7.0); abrupt smooth boundary. (1 to 4 inches thick)
Bw--3 to 10 inches; brown (7.5YR 5/3) loam, dark brown (7.5YR 3/3) moist; moderate medium prismatic structure; slightly hard, very friable, sticky and plastic; common very fine and fine, few medium roots; common very fine tubular pores; 5 percent gravel; noneffervescent; neutral (pH 6.8); clear smooth boundary. (0 to 8 inches thick)
Bt1--10 to 17 inches; reddish brown (5YR 4/3) cobbly clay, dark reddish brown (5YR 3/3) moist; strong medium prismatic structure; hard, firm, sticky and very plastic; many very fine and fine, common medium roots; common very fine tubular pores; 5 percent gravel and 10 percent cobble; common faint clay films in pores and on ped faces; few thin organic coatings in pores; noneffervescent; neutral (pH 7.0); gradual smooth boundary. (6 to 10 inches thick)
Bt2--17 to 35 inches; reddish brown (5YR 5/4) and reddish brown (5YR 5/3) gravelly clay, reddish brown (5YR 4/4) moist; strong coarse prismatic structure; very hard, very firm, very sticky and very plastic; common very fine, few fine and medium roots; few very fine tubular pores; 10 percent gravel and 5 percent cobble; common faint to distinct clay films in pores and on ped faces; noneffervescent; neutral (pH 7.0); clear wavy boundary. (14 to 20 inches thick)
Bt3--35 to 46 inches; yellowish red (5YR 5/6) gravelly clay, yellowish red (5YR 4/6) moist; strong coarse prismatic structure; very hard, very firm, very sticky and very plastic; few very fine and fine roots; few very fine tubular pores; 10 percent cobble and 15 percent gravel; many faint clay films in pores and on ped faces; noneffervescent; neutral (pH 7.2); clear wavy boundary. (8 to 14 inches thick)
Btk--46 to 63 inches; yellowish red (5YR 4/6) and pinkish white (5YR 8/2) very cobbly sandy clay, yellowish red (5YR 4/6) and pink (5YR 7/3) moist; strong medium angular blocky structure; very hard, very firm, sticky and very plastic; few very fine and fine roots; few very fine tubular pores; 25 percent cobble and 30 percent gravel; common faint to distinct clay films in pores and on ped faces; few medium soft calcium carbonate masses and thin coatings on rock fragments; noneffervescent soil matrix with violently effervescent features; slightly alkaline (pH 7.8).
TYPE LOCATION: Coconino County, Arizona; about 1000 feet west and 300 feet south of the northeast corner of Section 31,. T. 29 N., R. 7 W.; about 1 mile northwest of Thorton Lookout on the Hualapai Indian Reservation.
RANGE IN CHARACTERISTICS:
Soil Moisture: Intermittently moist in some part of the soil moisture control section during July-September and December-March. Driest during May and June. Approximately 60 percent of the precipitation occurs in the winter months. Typic ustic soil moisture regime.
Rock fragments: averages 10 to 30 percent in the particle size control section
Soil temperature: 48 to 52 degrees F.
Linear extensibility: 6.0 cm or more from the surface horizon to 40 inches
A horizon
Hue: 10YR, 7.5YR
Value: 4 through 6 dry, 3 or 4 moist
Chroma: 3 or 4 dry
Bw horizon
Value: 3 through 5 dry
Texture: loam, clay loam
Bt horizon
Hue: 5YR, 7.5YR
Value: 4 or 5 dry, 3 or 4 moist
Chroma: 3 through 6, dry or moist
Texture: clay, sandy clay (40 to 60 percent clay). 15 percent or more (absolute) clay increase at the upper boundary within a vertical distance of 1 inch
Btk horizon
Value: 4 or 5 dry
Texture: clay, sandy clay
Rock fragments: ranges from 10 to 55 percent gravel and cobble
Calcium carbonate equivalent: less than 15 percent
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: Turkeytrack soils are on stream terraces and fan terraces of plateaus. Elevation is 6500 to 6900 feet. These soils formed in old alluvium derived dominantly from sedimentary and igneous rocks. Slopes range from 1 to 6 percent. The mean annual precipitation is 18 to 20 inches. The mean annual air temperature is 46 to 50 degrees F. The frost-free period is 120 to 150 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Sponiker, Pinntank, Pocomate, and Retsover soils. Sponiker soils have thick mollic epipedons. Pinntank soils are moderately deep to bedrock. Pocomate soils are shallow to bedrock. Retsover soils lack a mollic epipedon and are deep to bedrock.
DRAINAGE AND PERMEABILITY: Well drained; slow runoff; slow permeability.
USE AND VEGETATION: Turkeytrack soils are used for timber production, livestock grazing and wildlife habitat. The present vegetation is ponderosa pine, mountain big sagebrush, blue grama, and bottlebrush squirreltail.
DISTRIBUTION AND EXTENT: Northwestern Arizona. This series is not extensive. MLRA 35.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona
SERIES ESTABLISHED: Coconino County, Arizona; Soil survey of Hualapai-Havasupai Area, Arizona, Parts of Coconino, Mohave and Yavapai Counties; 1993.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - The zone from 0 to 16 inches, mixed (AE, Bw, Bt1 horizons)
Argillic horizon - The zone from 9 to 62 inches (Bt1, Bt2, Bt3, Btk horizons)
Vertic subgroup - Linear extensibility of 6.0 cm or more to 40 inches
Pale feature - The abrupt clay increase between the Bw and Bt horizons
Classified according to Soil Taxonomy Second Edition, 1999; Keys to Soil Taxonomy Tenth Edition, 2006.