LOCATION REDLANDS AZ+COEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Typic Haplargids
TYPICAL PEDON: Redlands loamy fine sand--on a planar surface sloping 2 percent to the northwest at 5,320 feet elevation--rangeland. (Colors are for dry soil unless otherwise noted. When described on March 9, 1989, the soil was moist from 2 to 28 inches and otherwise dry throughout.)
A--0 to 2 inches; reddish brown (5YR 5/4) loamy fine sand, reddish brown (5YR 4/4) moist; moderate thick platy structure parting to moderate very fine granular; soft, very friable, nonsticky and nonplastic; common medium and fine and few very fine roots; common very fine irregularly shaped pores; slightly effervescent; slightly alkaline; abrupt smooth boundary.
AB--2 to 7 inches; yellowish red (5YR 5/6) fine sandy loam, reddish brown (5YR 4/4) moist; weak medium subangular blocky structure; soft, very friable, slightly sticky and nonplastic; common fine and few very fine roots; slightly effervescent; moderately alkaline; clear smooth boundary.
BA--7 to 13 inches; yellowish red (5YR 5/6) fine sandy loam, reddish brown (5YR 4/4) moist; moderate coarse subangular blocky structure; slightly hard, very friable, slightly sticky and nonplastic; common fine and very fine roots; common very fine tubular pores; very few faint clay films bridging sand grains; slightly effervescent; moderately alkaline; abrupt smooth boundary.
Bt1--13 to 22 inches; reddish brown (5YR 5/3) fine sandy loam, reddish brown (5YR 4/3) moist; moderate coarse subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; few fine and common very fine roots; common very fine tubular pores; few faint clay films on faces of peds and lining pores; strongly effervescent; moderately alkaline; clear smooth boundary.
Bt2--22 to 42 inches; reddish brown (5YR 5/3) clay loam, dark reddish brown (5YR 3/3) moist; moderate medium prismatic structure parting to moderate coarse subangular blocky; very hard, firm, sticky and plastic; common very fine roots; common very fine tubular pores; common faint clay films on faces of peds and lining pores; violently effervescent, secondary calcium carbonates segregated as very few fine irregularly shaped coats (or masses) on faces of peds; strongly alkaline; gradual smooth boundary.
Bk--42 to 65 inches; reddish brown (5YR 5/3) sandy clay loam, reddish brown (5YR 4/3) moist; moderate coarse subangular blocky structure; hard, firm, slightly sticky and slightly plastic; few very fine roots; common fine tubular pores; strongly effervescent, secondary calcium carbonates segregated in few fine irregularly shaped coats (or masses) on faces of peds; strongly alkaline.
TYPE LOCATION: Apache County, Arizona; about 8 miles east-southeast of Red Mesa Trading Post; 625 feet south and 1,350 feet west of the northeast corner of sec. 22, T.41N., R.29E.; Latitude 36 degrees 57 minutes 3 seconds N and Longitude 109 degrees 12 minutes 53 seconds W, NAD 27.
RANGE IN CHARACTERISTICS:
Soil moisture - The soil moisture control section is intermittently moist in some part from July to October and December to mid-April. Driest during May and June. Typic aridic soil moisture regime.
Soil temperature - 53 to 58 degrees F.
Depth to the base of the argillic horizon: 40 inches or more
Silicate clay content, control section weighted average - 18 to 35 percent; greater than 40 percent sand and 15 to 30 percent fine sand or coarser
Reaction - ranges from slightly alkaline in the surface to strongly alkaline in the lower subsoil and substratum
A horizon
Hue: 5YR, 7.5YR, 10YR
Value: 5 or 6 dry, 3 to 5 moist
Chroma: 2 to 4, dry or moist
Texture: loamy fine sand, fine sandy loam, very fine sandy loam
Calcium carbonate equivalent: 1 to 3 percent
Salinity: 0 to 2 dS/m
Sodicity, SAR: 0 to 3
AB or BA horizon (when present)
Hue: 5YR, 7.5YR, 10YR
Value: 5 or 6 dry, 3 to 5 moist
Chroma: 3 to 6, dry or moist
Texture: very fine sandy loam, fine sandy loam, sandy clay loam
Calcium carbonate equivalent: 1 to 3 percent
Salinity: 0 to 2 dS/m
Sodicity, SAR: 0 to 3
Upper B horizons
Hue: 5YR, 7.5YR, 10YR
Value: 5 or 6 dry, 3 to 5 moist
Chroma: 2 to 6, dry or moist
Texture: fine sandy loam, sandy clay loam, loam, clay loam
Calcium carbonate equivalent: 3 to 10 percent
Salinity, mmhos/cm: 0 to 2
Sodicity, SAR: 0 to 4
Lower Bt horizon and Btn horizon (when present)
Hue: 5YR, 7.5YR, 10YR
Value: 5 or 6 dry, 3 or 4 moist
Chroma: 3 or 4
Texture: clay loam, sandy clay loam
Calcium carbonate equivalent: 1 to 10 percent
Salinity: 2 to 4 dS/m
Sodicity, SAR: 0 to 13
Reaction: moderately alkaline or strongly alkaline
Bk and BC horizons (when present)
Hue: 5YR, 7.5YR, 10YR
Value: 5 to 7 dry, 3 to 6 moist
Chroma: 2 to 6, dry or moist
Texture: sandy clay loam, sandy loam, loam, fine sandy loam
Calcium carbonate equivalent: 1 to 10 percent
Gypsum content: 0 to 5 percent
Salinity: 0 to 4 dS/m
Sodicity, SAR: 0 to 13
Reaction: moderately alkaline or strongly alkaline
COMPETING SERIES: These are the Bacobi (AZ), Frisite (WY), Grazane (AZ), Griffy (WY), Kiki (NM), Neiber (WY), Papoose (NV), Saddle (WY), and Tijeras (NM) series. Bacobi, Grazane, Kiki, Neiber, and Saddle soils are moderately deep to bedrock. In addition, Neiber and Saddle have a mean annual soil temperature less than 53 degrees F. Frisite and Griffy soils are less than 40 inches deep to the base of the argillic horizon and have mean annual soil temperature of less than 53 degrees F. Papoose soils are 20 inches or less deep to the base of the argillic horizon and are more moist in the winter and drier in the summer. Tijeras soils are 24 inches or less deep to the base of the argillic horizon and have more than 35 percent rock fragments in the subsoil.
GEOGRAPHIC SETTING: Redlands soils are on fan remnants, mesas, and structural benches. They formed in Quaternary eolian material loess deposits weathered from Triassic age redbeds. Slopes are 1 to 8 percent. Elevation ranges from 4,800 to 6,200 feet. The mean annual precipitation is 6 to 10 inches. The mean annual air temperature is 52 to 56 degrees F. The frost-free period is 130 to 160 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Aneth, Bluechief, Mack, Mariano, and Sogzie soils. Aneth soils are sandy, do not have diagnostic horizons, and occur on hummocky, eolian mantled areas. Bluechief soils are moderately deep, do not have argillic horizons, and occur on benches and fan remnants. Mack soils are fine-loamy, have calcic horizons, and occur on fan remnants and mesas. Mariano soils are loamy-skeletal, have strong calcic horizons, and occur on fan remnants. Sogzie soils are coarse-loamy, have calcic horizons, and occur on mesas, undulating plateaus, and dipslopes of cuestas.
DRAINAGE AND PERMEABILITY: Well drained; low surface runoff; moderate permeability.
USE AND VEGETATION: Redlands soils are used for livestock grazing. Present vegetation is galleta, bottlebrush squirreltail, Indian ricegrass, alkali sacaton, fourwing saltbush, and winterfat.
DISTRIBUTION AND EXTENT: Redlands soils occur in southeastern Utah, southwestern Colorado, and northeastern Arizona. MLRA 35, LRR-D. Redlands soils are moderately extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona
SERIES ESTABLISHED: The series was established in the Grand Junction Area, Mesa County, Colorado, 1948.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - The zone from 0 to 2 inches (A horizon)
Argillic horizon - The zone from 13 to 42 inches (Bt1 and Bt2 horizons)
The series type location was moved to the Shiprock Soil Survey area in June 2004 because the soil in the Grand Junction Area was correlated to another series.
Classified according to Soil Taxonomy, Second Edition, 1999; Keys to Soil Taxonomy, Tenth Edition, 2006.
ADDITIONAL DATA: The series type location was sampled by the BIA lab in Gallup, NM as soil survey sample number S89NM-045-3. Another pedon was sampled for full characterization by the Soil Survey Laboratory (SSL), Lincoln, NE, as sample number S86AZ-017-011.
Updated and revised for the correlation of Ft. Defiance Area AZ715 2/08 DWD