LOCATION CLOVER SPRINGS AZEstablished Series
TAXONOMIC CLASS: Fine-silty, mixed, superactive, frigid Cumulic Haplustolls
TYPICAL PEDON: Clover Springs silt loam, grassland. (Colors for dry conditions unless otherwise noted.)
A1--0 to 9 inches; very dark brown (10YR 2/2) silt loam, very dark brown (10YR 2/2) moist; weak medium platy breaking to moderate fine and very fine granular structure; slightly hard, friable, slightly sticky and plastic; plentiful fine and few medium roots; few fine and medium interstitial pores; noneffervescent; neutral (pH 7.3); clear smooth boundary. (2 to 10 inches thick)
A2--9 to 14 inches; very dark gray (10YR 3/1) silt loam, black (10YR 2/1) moist; weak medium and coarse subangular blocky structure; slightly hard, friable, sticky and plastic; few fine and medium roots; common fine and few medium tubular and interstitial pores; noneffervescent; neutral (pH 7.1); clear wavy boundary. (4 to 10 inches thick)
C1--14 to 36 inches; brown (7.5YR 4/2) loam, dark brown (7.5YR 3/2) moist; few fine distinct yellowish red (5YR 5/8) mottles, yellowish red (5YR 4/6) moist; massive; slightly hard, friable, sticky and plastic; few fine roots; many very fine and few medium tubular and interstitial pores; noneffervescent; slightly alkaline (pH 7.4); gradual wavy boundary. (20 to 30 inches thick)
C2--36 to 72 inches; brown (7.5YR 4/2) loam, very dark brown (10YR 2/2) moist; massive; slightly hard, friable, slightly sticky and plastic; few fine roots; many very fine interstitial pores with very few large tubular pores; noneffervescent; neutral (pH 7.3).
TYPE LOCATION: Coconino County, Arizona. NW1/4, Sec. 22, T13N, R9E, west side of Forest Highway #10 in drainageway about 1,000 feet south of Clover Springs.
RANGE IN CHARACTERISTICS:
Soil moisture: Typic ustic
Mean annual temperature: less than 47 degrees F.
Mean summer soil temperature: less than 60 degrees F.
Reaction: slightly acid to slightly alkaline.
A horizon
Hue: 10YR and 7.5YR
Value: less than 5.5 dry and 3.5 moist and are usually 4 or less dry and 2 moist
Chroma: 1 to 3
Texture: dominantly loam or silt loam but range to fine sandy loam or gravelly fine sandy loam
C horizon
Hue: 10YR and 7.5YR
Value: less than 5.5 dry and 3.5 moist and are usually 4 or less dry and 2 moist
Chroma: 1 to 3
Texture: The control section may be stratified with thin layers (less than 1 inch thick) of finer or coarser soil material. A gravel lens often occurs at depths of 40 to 50 inches.
The soil may be free of mottles in the C1 horizon. Brown or reddish-brown mottles may be present in the lower part of the C horizon with hues of 7.5YR and 5YR.
COMPETING SERIES: These are the Dove Creek (SD) and Mitch series (UT). Dove Creek soils are in the Northern Great Plains Spring Wheat region (LRR-H MLRA 53B) and moist in May and June. Mitch soils formed in volcanic alluvium and are well drained.
GEOGRAPHIC SETTING: The Clover Springs soils occur in drainageways, narrow parks and meadows on nearly level to rolling flood plains and low terraces in the ponderosa pine zone. The slope gradient is usually 1 to 2 percent, but ranges from 0 to 10 percent. The soils are forming in recent alluvium derived from limestone and calcareous sandstone with influence from basalt. Accumulations are usually 3 to 8 feet thick. The average annual precipitation ranges from 16 to 26 inches and the mean annual temperature is about 43 degrees F. Clover Springs soils occur at elevations of 6,800 to 8,000 feet.
GEOGRAPHICALLY ASSOCIATED SOILS: In addition to the Luth series, these include the Soldier, Hogg, McVickers and Brolliar series. All of these have fine-textured argillic horizons, and the Soldier and McVickers soils have thick A2 horizons.
DRAINAGE AND PERMEABILITY: Moderately well-drained with moderate permeability. Runoff is slow to medium.
USE AND VEGETATION: These soils are used for summer grazing of livestock and wildlife feeding. Vegetation consists of Kentucky blue grass, blue grama, western wheatgrass, yellow sweet clover and some forbs.
DISTRIBUTION AND EXTENT: Bottomland and drainages of the high elevations in north central Arizona near the Mogollon Rim. MLRA 39. The series is of limited extent but is important for range land and production of feed for wildlife.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona
SERIES ESTABLISHED: St. John-Springerville Area, Arizona, 1971. Named after a spring in the Long Valley area.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - the zone from the surface of the soil to a depth of
40 or more inches (A and C horizons)
Irregular decrease in organic carbon with depth is inferred. The control section may be stratified with thin layers (less than 1 inch thick) of finer or coarser soil material.