LOCATION FEPS AZ
Established Series
Rev. BAL/PDC
08/2012
FEPS SERIES
The Feps series consists of very deep, very poorly drained soils that formed in mixed alluvium. These soils are on floodplains and have slopes of 0 to 1 percent. The mean annual precipitation is about 13 inches and the mean annual air temperature is about 63 degrees F.
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, calcareous, thermic Typic Halaquepts
TYPICAL PEDON: Feps fine sandy loam - wildlife habitat. (Colors are for dry soil unless otherwise noted.)
A1--0 to 1 inch; reddish yellow (7.5YR 6/6) fine sandy loam, strong brown (7.5YR 5/6) moist; massive; slightly hard, very friable, nonsticky and nonplastic; many fine and many very fine, and few medium roots; common very fine irregular pores; slightly effervescent; strongly alkaline (pH 8.6); abrupt smooth boundary. (1 to 2 inches thick)
A2--1 to 3 inches; brown (10YR 4/3) loam, dark brown (10YR 3/3) moist; massive; slightly hard, very friable, slightly sticky and slightly plastic; many fine and very fine, and few medium roots; common very fine irregular pores; slightly effervescent; strongly alkaline (pH 8.6); abrupt smooth boundary. (0 to 3 inches thick)
Cg1--3 to 8 inches; gray (7.5YR 5/1) loam, dark gray (7.5YR 4/1) moist; massive; slightly hard, very friable, slightly sticky and slightly plastic; many fine, many very fine, and few medium roots; common very fine irregular pores; slightly effervescent; strongly alkaline (pH 8.6); abrupt smooth boundary. (5 to 10 inches thick)
Cg2--8 to 22 inches; gray (7.5YR 6/1) loam, gray (7.5YR 5/1) moist; massive; hard, friable, moderately sticky and moderately plastic; common fine and very fine roots; common very fine irregular pores; few coarse faint black (7.5YR 2.5/1) organic coats; slightly effervescent; moderately alkaline (pH 8.4); abrupt smooth boundary. (10 to 20 inches thick)
Cg3--22 to 33 inches; gray (7.5YR 6/1) loam, gray (7.5YR 5/1) moist; massive; hard, friable, moderately sticky and moderately plastic; few fine and very fine roots; common very fine irregular pores; slightly effervescent; moderately alkaline (pH 8.2); abrupt smooth boundary. (10 to 20 inches thick)
Cg4--33 to 37 inches; gray (7.5YR 6/1) sandy clay loam, gray (7.5YR 5/1) moist; massive; slightly hard, very friable, slightly sticky and slightly plastic; few fine and very fine roots; common very fine irregular pores; many fine distinct light brown (7.5YR 6/4) redox features; slightly effervescent; moderately alkaline (pH 8.2); abrupt smooth boundary. (0 to 5 inches thick)
Cg5--37 to 60 inches; light brown (7.5YR 6/4) fine sandy loam, brown (7.5YR 5/4) moist; massive; slightly hard, very friable, slightly sticky and slightly plastic; few fine and very fine roots; common very fine irregular pores; few fine distinct very dark gray (7.5YR 3/1) organic coats; many fine distinct gray (7.5YR 6/1) redox features; slightly effervescent; moderately alkaline (pH 8.2); clear smooth boundary.
TYPE LOCATION: Yavapai County, Arizona; located about 1,005 feet north and 1,010 feet east of the southwest corner of section 15, T.16 N., R.3 E.; 34 degrees, 46 minutes, 44.0 seconds north latitude and 112 degrees, 1 minute, 26.5 seconds west longitude.
RANGE IN CHARACTERISTICS:
Soil Moisture: Continually wet in all parts of the soil moisture control section during January - December. Peraquic soil moisture regime.
Soil temperature: 62 to 65 degrees F.
Clay content: averages 15 to 25 percent in the particle-size control section
Rock fragments: Averages less than 5 percent in the particle-size control section
n value: assumed to be less than .7
Sodicity: SAR is assumed to be greater than 13 in the upper part
Depth to water table: 0 to 10 inches
A horizons
Hue: 7.5YR, 10YR
Value: 3 through 6 dry, 2 through 5 moist
Chroma: 1 through 4, dry or moist
Organic matter: .5 to 2 percent
Calcium carbonate equivalent: 0 to 5 percent
C horizons
Hue: 7.5YR, 10YR
Value: 5 through 7 dry, 4 through 6 moist
Chroma: 1 through 4, dry or moist
Organic matter: .5 to 2 percent
Calcium carbonate equivalent: 0 to 5 percent
Texture: loam, fine sandy loam, sandy clay loam
Redoximorphic features:
Redox concentrations:
Quantity: few to many
Size: fine
Contrast: faint to distinct
Hue: 7.5YR, 10YR
Value: 5 through 7 dry, 4 through 6 moist
Chroma: 3 to 6, dry or moist
Redox depletions:
Quantity: few to many
Size: fine
Contrast: distinct
Hue: 7.5YR, 10YR
Value: 3 through 7 dry, 2 through 6 moist
Chroma: 1 or 2, dry or moist
COMPETING SERIES: This is the
Cedarlake (TX) series. Cedarlake soils have more than 25 percent silicate clay in the particle-size control section and calcium carbonate equivalent of more than 5 percent in all horizons
GEOGRAPHIC SETTING: Feps soils are on floodplains and have slopes of 0 to 1 percent. These soils formed in mixed alluvium. Elevations range from 3,300 to 3,500 feet. The mean annual precipitation is 12 to 14 inches. The mean annual air temperature is 60 to 63 degrees F. The frost-free period is 180 to 220 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Bodecker and
Horner soils. Bodecker soils are excessively drained and sandy-skeletal. Horner soils are somewhat excessively drained and sandy.
DRAINAGE AND PERMEABILITY: Very poorly drained; ponded; moderate permeability.
USE AND VEGETATION: Used for wildlife habitat. Vegetation consists of cattails, goldenfruit sedge, bermuda grass, saltgrass, and russian thistle.
DISTRIBUTION AND EXTENT: Central Arizona. Feps soils are of very little extent. MLRA is 38. The named is derived from Phelps Dodge Corporation.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona
SERIES ESTABLISHED: Yavapai County, Arizona; Soil survey of Black Hills - Sedona Area, Arizona, Parts of Coconino and Yavapai Counties; 1996.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - The zone from 0 to 3 inches (A1, A2 horizons)
Peraquic moisture regime - The soil is saturated within 10 inches of the surface, 12 months of the year.
Recommend that lab data be obtained to confirm n value and SAR.
Classified according to Soil Taxonomy Second Edition, 1999; Keys to Soil Taxonomy Eleventh Edition, 2010
Revised for the correlation of Black Hills-Sedona, AZ, August 2012, CEM
National Cooperative Soil Survey
U.S.A.