LOCATION PERRYVILLE AZEstablished Series
TAXONOMIC CLASS: Coarse-loamy, carbonatic, hyperthermic Petronodic Haplocalcids
TYPICAL PEDON: Perryville gravelly loam - cultivated. (Colors are for dry soil unless otherwise noted.)
Ap--0 to 9 inches; very pale brown (10YR 7/3) gravelly loam, brown (10YR 5/3) and very pale brown (10YR 7/3) moist; weak fine granular structure; slightly hard, very friable, moderately sticky and moderately plastic; few fine roots; common fine tubular pores; 20 percent by volume very pale brown (10YR 8/2) semi-rounded calcium carbonate concretions (gravel); violently effervescent; moderately alkaline (pH 8.0); abrupt smooth boundary. (8 to 14 inches thick)
Ck1--9 to 16 inches; very pale brown (10YR 7/3) very gravelly loam, brown (10YR 5/3) and light gray (10YR 7/2) moist; massive; hard, very friable, moderately sticky and moderately plastic; few fine tubular and many fine irregular pores; 35 percent by volume very pale brown (10YR 8/2) semi-rounded calcium carbonate concretions; violently effervescent; moderately alkaline (pH 8.0); clear smooth boundary. (4 to 10 inches thick)
Ck2--16 to 27 inches; very pale brown (10YR 7/3) very gravelly loam, brown (10YR 5/3) and very pale brown (10YR 7/3) moist; massive; very hard, friable, moderately sticky and moderately plastic; common fine irregular pores; 40 percent by volume very pale brown (10YR 8/2) extremely hard semi-rounded calcium carbonate concretions; violently effervescent; moderately alkaline (pH 8.0); clear smooth boundary. (5 to 12 inches thick)
Ck3--27 to 38 inches; very pale brown (10YR 7/3) gravelly loam, brown (10YR 5/3) and very pale brown (10YR 7/3) moist; massive; hard, friable, moderately sticky and moderately plastic; common fine tubular and many fine irregular pores; 25 percent by volume very pale brown (10YR 8/2) extremely hard semi-rounded calcium carbonate concretions; violently effervescent; moderately alkaline (pH 8.2); clear smooth boundary. (7 to 15 inches thick)
Ck4--38 to 56 inches; very pale brown (10YR 7/3) sandy loam, pale brown (10YR 6/3) and very pale brown (10YR 7/3) moist; massive; very hard, firm, slightly sticky and slightly plastic; many fine tubular pores; 5 percent by volume very pale brown (10YR 8/2) extremely hard semi-rounded calcium carbonate concretions and many soft calcium carbonate masses; violently effervescent; moderately alkaline (pH 8.0); clear smooth boundary. (10 to 20 inches thick)
Ck5--56 to 65 inches; very pale brown (10YR 7/3) sandy loam, dark yellowish brown (10YR 4/4) and very pale brown (10YR 7/3) moist; massive; very hard, firm, slightly sticky and slightly plastic; common fine tubular and irregular pores; 10 percent by volume cobble; many very pale brown (10YR 8/2) calcium carbonate masses and few concretions that form a weakly cemented hardpan in places; violently effervescent; moderately alkaline (pH 8.0); abrupt smooth boundary. (6 to 12 inches thick)
2C--65 to 72 inches- very pale brown (10YR 7/3) very gravelly loamy sand, brown (10YR 5/3) moist; single grained; loose; many fine irregular pores; 50 percent by volume gravel; strongly effervescent; moderately alkaline (pH 8.0).
TYPE LOCATION: Maricopa County, Arizona; approximately 1.5 miles northeast of Sun City, Arizona; 615 feet north and 579 feet east of the southwest corner of the SE 1/4 of section 9, T.3 N., R.1 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. Typic aridic soil moisture regime.
Soil temperature: ranges from 72 degrees to 80 degrees F.
Depth to the 2C horizon is more than 40 inches
Clay content: averages less than 18 percent clay
Calcium carbonate: more than 40 percent CaC03 equivalent by weight
Rock fragments: ranges from 15 to 55 percent but averages less than 35 percent by volume. The gravel are calcium carbonate concretions and irregularly shaped fragments.
The control section is gravelly loam or gravelly sandy loam.
A horizon
Hue: 7.5YR, 10YR
Value: 5 through 7 dry, 4 through 7 moist
Chroma: 2 through 4, dry or moist
Texture: loam, gravelly loam, sandy loam
Structure ranges from weak thin platy to weak fine granular
Ck horizon
Hue: 7.5YR, 10YR
Value: 5 through 8 dry, 4 through 7 moist
Chroma: 3 or 4, dry or moist
Texture: loam, sandy loam, gravelly loam, very gravelly loam, gravelly sandy loam.
It is weakly cemented in some pedons.
COMPETING SERIES: These are no competing series.
GEOGRAPHIC SETTING: Perryville soils are on nearly level to gently sloping alluvial fans and terraces. Slopes are dominantly 0 to 3 percent. The soil formed in mixed alluvium from basalt, andesite, rhyolite, granite, limestone and quartzite. The climate is arid and semiarid continental with mild winters and extremely hot summers. Elevation ranges from 400 to 2500 feet. The mean annual precipitation ranges from 4 to 10 inches. Mean annual air temperature is 67 degrees to 74 degrees F. The frost-free period is 250 to 350 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Laveen,
Gunsight,
Rillito,
Cavelt,
Gilman,
Glenbar,
Mohall and
Pinal soils. Cavelt soils have strongly cemented petrocalcic horizons at shallow depths. Gilman and Glenbar soils do not have calcic horizons and have mixed mineralogy.
Mohall soils have moderately fine-textured argillic horizons. Pinal soils have an indurated duripan at shallow depths. Laveen, Gunsight, and Rillito are not carbonatic.
DRAINAGE AND PERMEABILITY: Well drained; slow to medium runoff; moderate permeability.
USE AND VEGETATION: Under irrigation, these soils are used for cotton and alfalfa. Native vegetation is mainly creosotebush, triangleleaf bursage, fourwing saltbush, cholla cactus, alfileria, sixweeks grama, white bursage and littleleaf paloverde.
DISTRIBUTION AND EXTENT: Southern Arizona. Perryville soils are of small extent. MLRA is 40.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona
SERIES ESTABLISHED: Pima County (Organ Pipe Cactus National Monument Survey Area), Arizona; 1971.
Calcic horizon - The zone from 9 to 65 inches (Ck1, Ck2, Ck3, Ck4, Ck5 horizons)
Petronodic feature - The zone from 0 to 38 inches containing more than 20 percent concretions (Ap, Ck1, Ck2, Ck3 horizons)
Classified according to Soil Taxonomy Second Edition, 1999