LOCATION TYENDE AZ+NMEstablished Series
TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, mesic Typic Natrargids
TYPICAL PEDON: Tyende loamy fine sand -- on a structural bench sloping 2 percent to the southwest at 5,205 feet elevation -- rangeland. (Colors are for dry soil unless otherwise noted. When described, the soil was moist from 2 to 16 inches and otherwise dry throughout.)
A--0 to 6 inches; yellowish red (5YR 5/6) loamy fine sand, yellowish red (5YR 4/6) moist; weak medium platy structure parting to weak fine granular; soft, very friable, nonsticky and nonplastic; common fine and very fine roots; few very fine irregularly shaped pores; very slightly effervescent; moderately alkaline (pH 8.0); abrupt smooth boundary. (1 to 6 inches thick)
2Btkn1--6 to 10 inches; red (2.5YR 5/6) fine sandy loam, red (2.5YR 4/6) moist; weak medium prismatic structure parting to moderate fine subangular blocky; hard, friable, slightly sticky and nonplastic; few fine and common very fine roots; few very fine tubular pores; few faint clay films on faces of peds and lining pores; slightly effervescent, secondary calcium carbonate segregated as very few fine irregularly shaped accumulations as filaments; strongly alkaline (pH 8.6); abrupt irregular boundary. (3 to 9 inches thick)
2Btkn2--10 to 14 inches; light red (2.5YR 6/6) sandy clay loam, red (2.5YR 4/6) moist; moderate medium prismatic structure parting to weak medium subangular blocky; hard, friable, slightly sticky and slightly plastic; few fine and common very fine roots; common fine and few very fine tubular pores; common faint clay films on faces of peds and lining pores; strongly effervescent, secondary calcium carbonate segregated as few fine and medium irregularly shaped accumulations on faces of peds; strongly alkaline (pH 9.0); clear smooth boundary. (3 to 8 inches thick)
2Btknz--14 to 18 inches; light red (2.5YR 6/6) very fine sandy loam, red (2.5YR 4/6) moist; weak medium prismatic structure parting to moderate medium subangular blocky; hard, friable, slightly sticky and nonplastic; common very fine roots; few fine and very fine tubular pores; 10 percent soft siltstone fragments; few faint clay films on faces of peds and lining pores; very fine sand sized salt crystals segregated in few fine filaments; strongly effervescent, secondary calcium carbonate segregated as few fine and medium irregularly shaped accumulations on faces of peds; strongly alkaline (pH 9.0); clear wavy boundary. (4 to 22 inches thick)
2Bknz--18 to 28 inches; light reddish brown (2.5YR 6/4) and light red (2.5YR 6/6) very fine sandy loam, reddish brown (2.5YR 4/4) and red (2.5YR 4/6) moist; moderate very thick platy structure parting to weak medium subangular blocky; slightly hard, friable, slightly sticky and nonplastic; common very fine roots; few very fine irregularly shaped pores; 40 percent soft sandstone and siltstone fragments; very fine sand sized salt crystals segregated in few fine and medium irregularly shaped accumulations on faces of peds and as filaments; strongly effervescent, secondary calcium carbonate segregated as common medium irregularly shaped accumulations as seams and on faces of peds; strongly alkaline (pH 9.0); clear wavy boundary. (0 to 10 inches thick)
3Ckynz--28 to 37 inches; light reddish brown (2.5YR 6/4) fine sandy loam, reddish brown (2.5YR 5/4) moist; massive; slightly hard, friable, slightly sticky and nonplastic; few very fine roots; few very fine irregularly shaped pores; 80 percent soft sandstone fragments; very fine sand sized salt and gypsum crystals segregated in very few fine irregularly shaped accumulations on rock fragments; strongly effervescent, secondary calcium carbonate segregated as few fine and medium irregularly shaped accumulations on rock fragments; strongly alkaline (pH 8.8); clear wavy boundary. (4 to 12 inches thick)
3Cr--37 inches; sandstone.
TYPE LOCATION: Apache County, Arizona; on the Navajo Indian Reservation about 10 miles north of Rock Point; 1,950 feet south and 400 feet east of the northwest corner of section 3, T.39 N., R.25 E.; Latitude 36 degrees 49 minutes 7 seconds North and Longitude 109 degrees 38 minutes 23 seconds West.
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. Assumed to be dry in all parts greater than 75 percent of the time (cumulative) that the soil temperature at 20 inches is greater than 41 degrees F. Driest during May and June. Typic aridic soil moisture regime.
Soil temperature - 54 to 56 degrees F
Depth to bedrock - 20 to 40 inches
Depth to base of natric horizon - 18 to 28 inches
Depth to calcic horizon - 9 to 23 inches
Clay content - control section weighted average is 10 to 18 percent
A horizon
Value: 5 or 6 dry, 4 or 5 moist
Btkn1 horizon
Hue: 2.5YR, 5YR
Value: 5 or 6 dry, 4 or 5 moist
Chroma: 6 through 8, dry or moist
Clay content: 10 to 18 percent
Reaction: strongly or very strongly alkaline
Salinity: 2 to 8 dS/m
SAR: 30 to 40
Btkn2 horizon
Hue: 2.5YR, 5YR
Value: 5 or 6 dry
Chroma: 4 through 6, dry or moist
Texture: Very fine sandy loam, sandy clay loam
Clay content: 18 to 24 percent
Reaction: strongly or very strongly alkaline
Calcium carbonate equivalent: 5 to 10 percent
Salinity: 8 to 16 dS/m
SAR: 30 to 60
Btknz and Bknz horizons
Hue: 2.5YR, 5YR
Value: 5 or 6 dry, 4 or 5 moist
Chroma: 4 through 6, dry or moist
Texture: Very fine sandy loam, fine sandy loam
Clay content: 12 to 18 percent
Calcium carbonate equivalent: 10 to 15 percent
Salinity: 12 to 20 dS/m
SAR: 30 to 60
Some pedons contain 10 to 50 percent soft, slakable sandstone and siltstone fragments. Some pedons contain up to 1 percent secondary gypsum.
C horizon
Hue: 2.5YR, 5YR
Value: 5 or 6 dry, 4 or 5 moist
Chroma: 3 through 6, dry or moist
Texture: very fine sandy loam, fine sandy loam
Clay content: 10 to 14 percent
Calcium carbonate equivalent: 5 to 10 percent
Salinity: 8 to 22 dS/m
SAR: 30 to 60
Gypsum content: 0 to 1 percent
Most pedons contain 25 to 80 percent soft, slakable sandstone and siltstone fragments.
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: Tyende soils are on summits of structural benches. They formed in eolian, alluvium and residuum derived from Jurassic and Triassic sandstone and siltstone. Slopes are 1 to 3 percent. Elevation ranges from 5,000 to 5,500 feet. The mean annual precipitation is 6 to 8 inches with 35 to 60 percent falling as rain from high-intensity thunderstorms between July and September. The mean annual air temperature is 52 to 54 degrees F. The frost-free period is 140 to 160 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Aneth, Piute, Sandbench, Sheppard, and Shumbegay soils. Aneth soils are very deep, sandy, and occur on adjacent eolian-mantled summits. Piute soils are very shallow to sandstone and occur on summits of structural benches. Sandbench soils are sandy and occur on eolian-mantled summits of structural benches. Sheppard soils are sandy and occur on stable dunes. Shumbegay soils are very deep and occur on adjacent stable dunes.
DRAINAGE AND PERMEABILITY: Well drained; slow runoff; slow permeability.
USE AND VEGETATION: Tyende soils are used for livestock grazing. Present vegetation is alkali sacaton, Indian ricegrass, galleta, Drummond goldenweed, shadscale, and broom snakeweed.
DISTRIBUTION AND EXTENT: Tyende soils are of small extent on the Tyende Saddle portion of the Colorado Plateau province in northeast Arizona. MLRA is 35.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona
SERIES ESTABLISHED: Apache County, Arizona; Shiprock Area Soil Survey; 1993.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - The zone from 0 to 6 inches (A horizon)
Natric horizon - The zone from 6 to 18 inches (2Btkn1, 2Btkn2, 2Btknz horizons)
Calcic horizon - The zone from 10 to 28 inches (2Btkn2, 2Btknz, 2Bknz horizons)
Paralithic contact - The boundary at 37 inches (3Cr horizon)
Classified according to Soil Taxonomy Second Edition, 1999; Keys to Soil Taxonomy Tenth Edition, 2006.