LOCATION HANTZ AZ+NMEstablished Series
TAXONOMIC CLASS: Fine, mixed, superactive, calcareous, thermic Vertic Torrifluvents
TYPICAL PEDON: Hantz silty clay - rangeland. (Colors are for dry soil unless otherwise noted.)
A--0 to 3 inches; light brownish gray (10YR 6/2) silty clay, grayish brown (10YR 5/2) moist; weak fine and medium subangular blocky structure; very hard, firm, very sticky and very plastic; few fine roots; few very fine and fine tubular pores; 5 percent angular gravel; violently effervescent; moderately alkaline (pH 8.2); abrupt smooth boundary. (2 to 4 inches thick)
C1--3 to 22 inches; light brownish gray (10YR 6/2) silty clay, grayish brown (10YR 5/2) moist; weak medium and coarse angular blocky structure; very hard, very firm, very sticky and very plastic; few fine roots; few very fine and fine tubular pores; violently effervescent; moderately alkaline (pH 8.3); clear smooth boundary. (15 to 22 inches thick)
C2--22 to 60 inches; light brownish gray (10YR 6/2) silty clay, grayish brown (10YR 5/2) moist; weak coarse and medium angular blocky structure; very hard, very firm, very sticky and very plastic; few medium roots; few very fine tubular pores; violently effervescent; strongly alkaline (pH 8.5).
TYPE LOCATION: Yavapai County, Arizona; about 2,000 feet southeast of the junction of Middle Verde and Cornville cutoff road; Northeast 1/4 of section 3, T.14N., R.4E.
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 aridic soil moisture regime.
Soil temperature: 59 to 72 degrees F.
Soil cracking: When dry, cracks 1 cm or more wide, extend to depths of 20 inches or more and remain open for more than 240 days, cumulative, and are not closed for 60 days. Pressure faces and slickensides are common.
Rock fragments: 0 to 35 percent gravel
Organic matter: less than 1 percent decreasing irregularly with depth
Gypsum: 0 to 2 percent
Salinity: slightly to moderately
Sodicity: moderate to strong
A and C horizons
Hue: 5YR, 7.5YR, 10YR
Value: 4 through 7 dry, 3 through 7 moist
Chroma: 2 through 6, dry or moist
Texture: silty clay, silty clay loam, clay, clay loam (35 to 50 percent clay)
Reaction: slightly to very strongly alkaline
Calcium carbonate equivalent: 5 to 15 percent
COMPETING SERIES: This is the Pecos (TX) series. Pecos soils have greater than 1 percent organic matter in the upper 20 inches of the surface, are moderately well drained and have redox features.
GEOGRAPHIC SETTING: The Hantz soils are on alluvial fans, stream terraces, and flood plains and have slopes of 0 to 5 percent. Elevations are 1,750 to 5,500 feet. The soils formed in stratified mixed alluvium. The mean annual precipitation is 8 to 12 inches and is evenly divided between two periods, July through September, and December through February. The mean annual air temperature is 56 to 70 degrees F. The frost-free period is 180 to 280 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Anthony, Bridge and Cornville soils. Anthony soils are coarse-loamy. Bridge soils have a calcic horizon. Cornville soils have argillic horizons.
DRAINAGE AND PERMEABILITY: Well drained; slow to medium runoff; slow permeability. Subject to flooding and/or sheet flow.
USE AND VEGETATION: Used for livestock grazing and irrigated cropland. Native vegetation is snakeweed, widely spaced creosotebush, tobosa grass, and annuals. About 90 percent of the surface is barren.
DISTRIBUTION AND EXTENT: Central and southern Arizona and New Mexico. The Hantz soils are of moderate extent. This soil occurs in LRR-D, MLRAs 38, 40, 41, and 42.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona
SERIES ESTABLISHED: Beaver Creek Area, Yavapai County, Arizona; 1965.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - the zone from 0 to 3 inches (A horizon)
Entisol feature - the absence of diagnostic subsurface horizons
Vertic feature - primarily cracks extending 12 inches deep or more
Fluvial feature - irregular decrease in organic carbon in the zone from 3 to 60 inches (C1, C2 horizons)
Note not able to geo-reference from Type Location description. It could be anywhere in 160 acres
Classified according to Soil Taxonomy, Second Edition, 1999; Keys to Soil Taxonomy, Tenth Edition, 2006.
Revised for the correlation of AZ661, 2/2009, WWJ