LOCATION POGANEAB UT+ NMEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, calcareous, mesic Fluvaquentic Endoaquepts
TYPICAL PEDON: Poganeab loam - wet meadow. (Colors are for moist soil unless otherwise noted.)
A1--0 to 10 cm; dark grayish brown (10YR 4/2) loam; light brownish gray (10YR 6/2) dry; weak fine granular structure; soft, very friable, slightly sticky, slightly plastic; many very fine and fine roots; common very fine vesicular pores; moderately effervescent; moderately alkaline (pH 8.2); abrupt smooth boundary.
A2--10 to 23 cm; dark grayish brown (10YR 4/2) loam; light brownish gray (10YR 6/2) dry; weak fine subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; many very fine and fine roots; common very fine tubular pores; few prominent brown (10YR 5/3) and brown (7.5YR 5/4) moist redox accumulations; strongly effervescent; moderately alkaline (pH 8.4); clear smooth boundary. (Combined thickness of the A horizon ranges from 13 to 30 cm thick)
Bw--23 to 43 cm; grayish brown (10YR 5/2) silty clay loam; light brownish gray (10YR 6/2) dry; weak fine subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; common very fine and fine roots; few very fine tubular pores; few fine prominent brown (10YR 5/3) and brown (7.5YR 5/4) moist redox accumulations; strongly effervescent; moderately alkaline (pH 8.4); 5 percent calcium carbonate equivalent; clear smooth boundary. (10 to 42 cm thick)
C1--43 to 122 cm; gray (10YR 5/1) silty clay loam; light gray (10YR 7/1) dry; massive; slightly hard, friable, slightly sticky, slightly plastic; few very fine and fine roots; few very fine tubular pores; few prominent, brown (10YR 5/3) and brown (7.5YR 5/4) redox accumulations; strongly effervescent; strongly alkaline (pH 8.6); 10 percent calcium carbonate equivalent; clear wavy boundary.
C2--122 to 152 cm; grayish brown (10YR 5/2) sandy loam; light gray (10YR 7/2) dry; massive; soft, friable, slightly sticky, non plastic; strongly effervescent; strongly alkaline (pH 8.8); 15 percent calcium carbonate equivalent.
TYPE LOCATION: Millard County, Utah; 0.8 km north of Leamington; 107 m north, 640 m east of southwest corner of Section 3, T. 15 S., R. 4 W.; USGS Lynndyl East 7.5 minute quadrangle; latitude 39 degrees 32 minutes 25.7 seconds N and longitude 112 degrees 17 minutes 5.7 seconds W; UTM Zone 12 389587e 4377546n, NAD 83.
RANGE IN CHARACTERISTICS:
Soil moisture: Usually moist; aquic soil moisture regime.
Mean annual soil temperature: 8 to 11 degrees C.
Depth to the base of the cambic horizon: 23 to 72 cm.
Salinity: slightly saline to strongly saline.
Other features: Stratification with lenses of sand or sandy loam is common .
Calcium carbonate equivalent: 10 to 40 percent.
Particle-size control section - Clay content: 27 to 35 percent.
Sand content: More than 15 percent coarser than very fine sand.
A horizon
Value: 5 through 7 dry and 3 through 5 moist (value of 5 dry and 3 moist are less than 5 cm thick).
Chroma: 0 through 3.
Structure: Weak to moderate and fine to medium platy, weak to moderate fine and moderate subangular blocky or weak coarse prismatic structure. In some pedons the horizon is massive.
Consistence: Slightly hard to very hard, firm or friable, moderately sticky and plastic.
Reaction: Moderately alkaline or strongly alkaline
Bw horizon
Hue: 10YR or 2.5Y.
Value: 5 through 7 dry and 3 through 5 moist.
Chroma: 1 or 2.
Texture: Silty clay loam texture most common; commonly stratified, ranging from sand to silty clay or clay. The sand horizons are usually not more than 10 cm thick.
Structure: Weak to moderate, coarse or medium blocky or angular structure .
Reaction: Moderately alkaline or strongly alkaline.
C horizon
Hue: 10YR or 2.5Y.
Value: 5 through 7 dry and 3 through 5 moist.
Chroma: 1 or 2.
Texture: Silty clay loam, silt loam and sandy loam are most common; commonly stratified, ranging from sand to silty clay or clay. The sand horizons are usually not more than 10 to 30 cm thick. Contrasting particle size classes are below 100 cm when present.
Reaction: Moderately alkaline or strongly alkaline.
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING:
Elevation: 1,370 to 1,920 meters
Landform: flood plains, drainage ways, valley floors, and lower alluvial fans
Parent material: mixed alluvium from sedimentary and igneous rocks
Slope: 0 to 3 percent
Mean annual air temperature: 7 to 11 degrees C.
Mean summer temperature: 19 to 20.5 degrees C.
Mean annual precipitation: 150 to 380 mm
Frost-free period: 100 to 140 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Abcal, Anco, James Canyon, Green River and the Shumway soils. Abcal soils have more than 35 percent clay in the particle-size control section. Anco soils have fine-silty particle-size control sections. James Canyon soils have mollic epipedons. Green River soils have less than 18 percent clay in the particle-size control section. Shumway soils have fine particle-sizecontrol sections.
DRAINAGE AND PERMEABILITY: Poorly drained; depth to the seasonal high water table is 15 to 50 cm, usually found in the spring and summer; low or very low runoff; moderately slow to very slow permeability; moderately low saturated hydraulic conductivity.
USE AND VEGETATION: Used principally for meadow hay or pasture. Native plants are wiregrass, saltgrass, sedges and greasewood.
DISTRIBUTION AND EXTENT: Central and southwestern Utah, and northern New Mexico. MLRA 28A and 51. Poganeab soils are moderately extensive, with about 26,099 acres mapped (24,909 acres in MLRA 28A in Utah).
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona
SERIES ESTABLISHED: Richfield Area, Utah 1947.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon: The zone from 0 to 18 cm. (A1 and part of A2 horizon)
Cambic horizon: The zone from 23 to 43 cm. (Bw horizon)
Particle-size control section: The zone from 25 to 100 cm (part of the Bw and C1 horizons).
Fluvaquentic feature: Irregular decrease in organic matter with depth is assumed from stratification and the landscape position of this soil.
The classification is based on the "Keys to Soil Taxonomy, Tenth Edition, 2006".