LOCATION RADNIK AZ+UTEstablished Series
TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, calcareous, mesic Ustic Torrifluvents
TYPICAL PEDON: Radnik fine sandy loam - rangeland. (Colors are for dry soil unless otherwise noted).
C1--0 to 4 inches; reddish brown (5YR 5/4) fine sandy loam, reddish brown (5YR 4/4) moist; single grain; loose, very friable; common very fine roots; many very fine interstitial pores; noneffervescent; slightly alkaline (pH 7.8); clear wavy boundary. (1 to 5 inches thick)
C2--4 to 60 inches; reddish brown (2.5YR 5/4) stratified fine sandy loam, reddish brown (2.5YR 4/4) moist; massive; slightly hard, very friable; few very fine roots; common very fine tubular pores; slightly effervescent; calcium carbonate is disseminated; few krotovina; slightly alkaline (pH 7.8).
TYPE LOCATION: Mohave County, Arizona; about 3 miles northeast of Moccasin; 700 feet west and 200 feet north of the southeast of corner section 28, T. 41 N., R. 4 W.
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. Ustic aridic soil moisture regime.
Soil Temperature: 52 to 58 degrees F.
Rock fragments: Typically less than 5 percent gravel, but ranges to 15 percent gravel, cobble and stones
A or C horizons:
Hue: 2.5YR, 5YR, 7.5YR
Value: 4 to 6 dry, 3 to 5 moist
Chroma: 2 to 6, dry or moist
Texture: average texture of the control section is loam, fine sandy loam, sandy loam, very fine sandy loam, and contain strata of fine sand or loamy fine sand,
Stratification: Thin strata of finer or coarser material is common
Reaction: slightly to strongly alkaline
Organic carbon: irregular decrease with depth
COMPETING SERIES: These are the Cameo (CO), Castledale (T) (UT), Charalito (NM), Clarkelen (WY), Colorow (CO), Glenberg (CO), Innacutt (NM), Kornman (CO), Redbank (WY) and Tapicito (NM) soils. Cameo soils have hue of 10YR or yellower. Castledale soils average more than 15 percent rock fragments in the particle-size control section. Charalito soils average 5 to 35 percent rock fragments in the particle-size control section and have hue 10YR or yellower. Clarkelen, Glenberg, Kornman, and Redbank soils are moist in the soil moisture control section in the spring and early summer and attempt to reflect the effects of soil forming agents unique to the Great Plains. The use of the Redbank series in MLRA 35 should be discontinued. Colorow soils have hue 10YR and yellower and redoximorphic features in the lower part of the control section due to a fluctuating water table. Innacut soils contain a significant amount of volcanic glass and mica from miceous sandstone. Tapicito soils have 7.5YR or 10YR hues through out the soil profile.
GEOGRAPHIC SETTING: Radnik soils are on floodplains alluvial flats, and alluvial fans at elevations of 4,300 to 6,600 feet. Slopes range from 0 to 5 percent. Mean annual precipitation is 8 to 14 inches. Mean annual air temperature is about 45 to 56 degrees F. The frost-free period is 120 to 165 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Begay, Mespun and Palma series. Begay soils have cambic horizons. Palma soils have argillic horizons. Mespun soils are sandy.
DRAINAGE AND PERMEABILITY: Well drained; medium runoff; moderate or moderately rapid permeability.
USE AND VEGETATION: Used mainly for irrigated cropland. Vegetation in rangeland areas is mainly galleta, Indian ricegrass, blue grama, and Mormon-tea.
DISTRIBUTION AND EXTENT: Northern Arizona. The Radnik series is of small extent. MLRA is 35.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona
SERIES ESTABLISHED: Mohave County, Arizona; Soil survey of Mohave County Area, Arizona, Northeastern Part, and Part of Coconino County; 1992.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Entisol feature - The absence of diagnostic subsurface horizons
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