LOCATION STOZUNI NMEstablished Series
TAXONOMIC CLASS: Loamy, mixed, superactive, nonacid, frigid Lithic Ustorthents
TYPICAL PEDON: Stozuni sandy loam--woodland (Colors are for dry soils unless otherwise noted.)
A--0 to 2 inches; brown (7.5YR 5/4) sandy loam, dark brown (7.5YR 3/4) moist; weak fine granular structure; soft, very friable, nonsticky and nonplastic; common fine and many very fine roots; many very fine irregular pores; neutral (pH 7.0); abrupt smooth boundary. (2 to 5 inches thick.)
C1--2 to 10 inches; brown (7.5YR 5/4) fine sandy loam, dark brown (7.5YR 3/4) moist; massive; soft, very friable, nonsticky and nonplastic; few medium and many fine and very fine roots; many very fine irregular pores; neutral (pH 7.2); clear smooth boundary. (The combined thickness of the C horizons is 6 to 13 inches.)
C2--10 to 15 inches; strong brown (7.5YR 4/6) fine sandy loam, brown (7.5YR 4/4) moist; soft, very friable, nonsticky and nonplastic; common fine and many very fine roots; many very fine irregular pores; neutral (pH 7.2); abrupt smooth boundary. (The combined thickness of the C horizons is 6 to 13 inches.)
2R--15 inches; sandstone--weathered in the upper part
TYPE LOCATION: McKinley County, New Mexico; 2400 feet east and 2000 feet south of the northwest corner of sec 36, T. 9 N., R. 17 W.; 108 degrees 35 minutes 1 seconds west longitude, 34 degrees 58 minutes 1 seconds north latitude.
RANGE IN CHARACTERISTICS:
Soil Moisture: Intermittently moist in some part of the soil moisture control section July through October and is moist in all or some parts November through April. The soil is driest during May and June. Typic ustic moisture regime.
Soil Temperature: 42 to 47 degrees F.
Particle-size control section: 6 to 18 percent clay
Depth to lithic contact: 4 to 20 inches to sandstone
A horizon:
Hue: 7.5YR, 10YR
Value: 3 to 5 moist
Chroma: 2 through 4, dry or moist
Texture: sandy loam, loam
Rock fragments: 0 to 35 percent
C horizons:
Hue: 7.5YR, 10YR
Value: 4 or 5 dry; 3 to 5 moist
Chroma: 2 to 6 dry; 2 to 4 moist
Texture: sandy loam, loam
Rock fragments: 0 to 25 percent
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: The Stozuni soils formed in eolian material and alluvium and slope alluvium derived from sandstone and are on mesas, cuestas, and hills. Slopes are 2 to 60 percent. Elevations range from 7,000 to 8,000 feet. The mean annual temperature is 40 to 45 degrees F., and the mean annual precipitation is 18 to 22 inches. The frost free period is 80 to 110 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Shoemaker and Trazuni soils on summits of mesas; and the Valnor and Techado soils on hill slopes of hills. The Shoemaker and Valnor soils are moderately deep to sandstone and shale respectively. Trazuni soils are very deep and have a mollic epipedon. Techado soils have a paralithic contact to shale at less than 20 inches.
DRAINAGE AND PERMEABILITY: Somewhat excessively drained, slow to very high runoff, and moderately rapid permeability.
USE AND VEGETATION: This series is used for wood products and wildlife habitat. The present vegetation is ponderosa pine, pinyon pine, Rocky Mountain juniper, alligator juniper, Gambel oak, mountain muhly, Arizona fescue, pine dropseed, bottlebrush squirreltail, prairie junegrass, and muttongrass.
DISTRIBUTION AND EXTENT: West central New Mexico. MLRA 35, LRR-D. This series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona
SERIES ESTABLISHED: McKinley County Area, New Mexico; McKinley County and Parts of Cibola and San Juan Counties, 2001.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon: The zone from 0 to 2 inches (A horizon)
Entisol feature: No diagnostic horizon
Lithic contact: The boundary with bedrock at 15 inches (2R horizon)
Classified according to Soil Taxonomy, Second Edition, 1999; Keys to Soil Taxonomy, Tenth Edition, 2006.
Updated and revised for the correlation of Ft. Defiance Area AZ715 2/08 DWD