LOCATION LAMPSHIRE AZEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, nonacid, thermic Lithic Ustic Torriorthents
TYPICAL PEDON: Lampshire very cobbly loam - rangeland (Colors are for dry soil unless otherwise noted).
A--0 to 8 inches; grayish brown (10YR 5/2) very cobbly loam, very dark grayish brown (10YR 3/2) moist; moderate fine granular structure; slightly hard, friable, slightly sticky and slightly plastic; many fine and few medium roots; many fine tubular pores; 20 percent gravel and 40 percent cobble; neutral (pH 7.0); abrupt irregular boundary (4 to 20 inches thick).
2R--8 to 60 inches; tuff.
TYPE LOCATION: Santa Cruz County, Arizona; approximately 2 miles west-northwest of Tubac; on the southeast slope of a low hill; 800 feet south and 500 feet west of the northeast corner of Section 11, T.21 S., R.12 E.
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. The epipedon is moist in some part less than 90 days (cumulative) when the soil temperature is above 41 degrees F. in 7 out of 10 years.
Rock Fragments: 35 to 70 percent cobble and gravel
Soil Temperature: 59 to 72 degrees F.
Depth to bedrock: 4 to 20 inches. Some pedons may have a layer less than 3 inches thick of weathered bedrock above the lithic contact.
A or C horizons
Hue: 7.5YR, 10YR
Value: 3, 4, or 5 dry, 2 to 4 moist
Chroma: 1 to 4, dry or moist
Organic matter: 1 to 2 percent
Texture: loam, sandy loam, fine sandy loam, silt loam, coarse sandy loam (10 to 20 percent clay)
Reaction: slightly acid to moderately alkaline
Calcium carbonate: few coatings on bedrock in some pedons
COMPETING SERIES: These are the Coyanosa (TX), Lingua (TX) and Reduff (TX) series. Reduff soils contain more than 20 percent clay. Coyanosa soils formed from sandstone and contain less than 1 percent organic matter. Lingua soils are inactive.
GEOGRAPHIC SETTING: Lampshire soils are on hills and mountains at elevations of 2,500 to 5,800 feet. These soils formed in alluvium and colluvium from basalt, tuff, andesite, rhyolite, dacite, granite and schist. Slopes range from 0 to 90 percent. The mean annual precipitation is 12 to 16 inches. The mean annual air temperature is 57 to 70 degrees F. The frost-free period is 170 to 250 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Caralampi, Chiricahua, Graham and Signal soils. Caralampi and Signal soils are very deep. Chiricahua and Graham soils have a fine-textured argillic horizon.
DRAINAGE AND PERMEABILITY: Well drained; medium to high runoff; moderate or moderately rapid permeability.
USE AND VEGETATION: Lampshire soils are used for livestock grazing and wildlife habitat. Vegetation is sideoats, sprucetop, hairy and slender gramas, three-awn, canebeardgrass, plains lovegrass, bristlegrass, tanglehead, curly mesquite, black grama, ocotillo, whitethorn, range ratany, mimosa, catclaw, agave, beargrass, sotol, barrel cacti, palo verde and desert hackberry.
DISTRIBUTION AND EXTENT: Southern and Central Arizona. This series is extensive. This soil occurs in LRR-D, MLRAs 38 and 41.
MLRA OFFICE RESPONSIBLE: Phoenix, Arizona
SERIES ESTABLISHED: Santa Cruz County Area, Arizona; 1971.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - The zone from 0 to 8 inches (A horizon)
Lithic contact - The boundary at 8 inches (2R horizon)
Classified according to Soil Taxonomy, Second Edition, 1999; Keys to Soil Taxonomy, Tenth Edition, 2006.
Updated competing series section 3/17/08, CEM