LOCATION POGAL UTEstablished Series
TAXONOMIC CLASS: Coarse-silty, mixed, active, mesic Sodic Calcixerepts
TYPICAL PEDON: Pogal silt loam--rangeland. (Colors are for dry soil unless otherwise noted.)
A--0 to 4 inches; very pale brown (10YR 7/3) silt loam, grayish brown (10YR 5/2) moist; weak thin platy structure; soft, very friable, slightly sticky and slightly plastic; common fine, very fine and few medium roots; common very fine vesicular pores; strongly effervescent; moderately alkaline (pH 8.3); 2 percent exchangeable sodium; abrupt smooth boundary. (2 to 7 inches thick)
Bw--4 to 13 inches; very pale brown (10YR 7/3) silt loam, grayish brown (10YR 5/2) moist; weak medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; few very fine, fine, and medium roots; common very fine vesicular pores; strongly effervescent; strongly alkaline (pH 8.5); 5 percent exchangeable sodium; clear wavy boundary. (4 to 9 inches thick)
Bn--13 to 22 inches; very pale brown (10YR 7/3) silt loam, brown (10YR 5/3) moist; weak medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; few very fine, fine, and medium roots; common very fine tubular pores; strongly effervescent; 1 percent fine threads of secondary carbonate; very strongly alkaline (pH 9.3); 38 percent exchangeable sodium; gradual wavy boundary. (9 to 15 inches thick)
Bkn1--22 to 35 inches; very pale brown (10YR 7/3) silt loam, pale brown (10YR 6/3) moist; massive; slightly hard, friable, slightly sticky and slightly plastic; few very fine and medium roots; common very fine tubular pores; strongly effervescent; 18 percent calcium carbonate equivalent; 2 percent fine threads and masses of secondary carbonate; very strongly alkaline (pH 9.3); 56 percent exchangeable sodium; clear wavy boundary. (0 to 13 inches thick)
Bkn2--35 to 49 inches; very pale brown (10YR 8/3) silt loam, pale brown (10YR 6/3) moist; massive; slightly hard, friable, slightly sticky and slightly plastic; few very fine, fine, and medium roots; many very fine tubular pores; violently effervescent; 26 percent calcium carbonate equivalent; 2 percent fine threads and masses of secondary carbonate; very strongly alkaline (pH 9.2); 73 percent exchangeable sodium; gradual wavy boundary. (6 to 20 inches thick)
Cn--49 to 60 inches; very pale brown (10YR 8/3) silt loam, pale brown (10YR 6/3) moist; massive; soft, friable, slightly sticky and nonplastic; few very fine roots; many very fine tubular pores; violently effervescent; very strongly alkaline (pH 9.4); 66 percent exchangeable sodium.
TYPE LOCATION: Box Elder County, Utah; about 9.4 miles west-northwest of Corinne in the state public shooting grounds; approximately 700 feet east and 400 feet north of southwest corner of section 27, T. 10 N., R. 4 W.; USGS Public Shooting Grounds 7.5 minute topographic quadrangle; 41 degrees 33 minutes 57 seconds north latitude and 112 degrees 17 minutes 30 seconds west longitude, NAD83; UTM zone 12N 392309E, 4602391N, NAD83.
RANGE IN CHARACTERISTICS:
Soil moisture - Typically moist in winter and spring, dry in summer and fall; the soils are dry in all parts of the moisture control section for more than 60 consecutive days following the summer solstice; Xeric moisture regime that borders on aridic.
Mean annual soil temperature - 50 to 54 degrees F.
Mean summer soil temperature - about 72 degrees F.
Ochric epipedon thickness - 7 to 13 inches.
Depth to calcic horizon - 20 to 38 inches.
Particle-size control section - Clay content: 11 to 15 percent.
Exchangeable sodium - 35 to 75 percent within 40 inches of the soil surface.
A horizon - Hue: 10YR or 2.5Y.
Value: 6 or 7 dry, 4 or 5 moist.
Chroma: 2 or 3, dry or moist.
Texture: Silt loam or very fine sandy loam.
Reaction: Moderately alkaline or strongly alkaline.
Salinity (EC): 0 to 4 mmhos/cm.
Effervescence: Strongly effervescent or violently effervescent.
Calcium carbonate equivalent: 10 to 25 percent.
Bw and Bn horizons - Hue: 10YR or 2.5Y.
Value: 5 through 7 dry, 4 or 5 moist.
Chroma: 2 or 3, dry or moist.
Texture: Silt loam or very fine sandy loam.
Reaction: Strongly alkaline or very strongly alkaline.
Salinity (EC): 4 to 20 mmhos/cm.
Sodicity (SAR): 5 to 30.
Effervescence: Strongly effervescent or violently effervescent.
Calcium carbonate equivalent: 15 to 30 percent.
Bkn and Cn horizons - Hue: 10YR through 5Y.
Value: 6 through 8 dry, 4 through 6 moist.
Chroma: 2 or 3, dry or moist.
Texture: Silt loam or loam; some pedons have fine sandy loam below 40 inches.
Reaction: Strongly alkaline or very strongly alkaline.
Salinity (EC): 16 to 32 mmhos/cm.
Sodicity (SAR): 13 to 30.
Effervescence: Strongly effervescent or violently effervescent.
Calcium carbonate equivalent: 20 to 30 percent.
Other features: Some pedons have redox concentrations as fine to medium, faint to prominent masses of iron accumulation below depths of 30 inches.
COMPETING SERIES: This is the Stingal series.
Stingal soils have electrical conductivities less than 8 mmhos/cm within 40 inches of the soil surface.
GEOGRAPHIC SETTING: Pogal soils are on rounded or elongated mounds on lake plains. The mounds are about 6 to 20 feet high and have short, abrupt sides. The soils formed in loess and lacustrine deposits derived mainly from limestone and sandstone. Slopes are 1 to 3 percent. Elevations range from 4,200 to 4,250 feet. The climate is dry subhumid. The mean annual precipitation is 12 to 16 inches, the mean annual temperature is 48 to 52 degrees F., and the frost-free period is 140 to 160 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Eimarsh, Lasil, Pintailake, and Saltair soils. Eimarsh and Pintailake soils are fine textured and are poorly drained and very poorly drained, respectively. Lasil soils are fine-silty and have natric horizons. Saltair soils are fine-silty and have salic horizons.
DRAINAGE AND PERMEABILITY: Well drained; medium surface runoff; moderate permeability (moderately high or high saturated hydraulic conductivity).
USE AND VEGETATION: Pogal soils are used for rangeland and wildlife habitat. Small areas have been leveled and used for nonirrigated cropland. The vegetation is black greasewood, alkali sacaton, Wyoming big sagebrush, basin wildrye, tall wheatgrass, and annual mustard.
DISTRIBUTION AND EXTENT: Northwestern Utah. These soils are not extensive with about 9,500 acres of the series mapped to date. MLRA 28A.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona.
SERIES ESTABLISHED: Box Elder County, Utah, Eastern Part, 1969.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - The zone from the soil surface to 7 inches (A horizon and part of the Bw horizon).
Cambic horizon - The zone from 4 to 22 inches (Bw and Bn horizons).
Calcic horizon - The zone from 22 to 49 inches (Bkn1 and Bkn2 horizons).
Particle-size control section - The zone from 10 to 40 inches (Bn and Bkn1 horizons and parts of the Bw and Bkn2 horizons).
ADDITIONAL DATA: The typical pedon at the series type location has partial characterization data by the Soils Laboratory from Utah State University (USU) Logan, UT and is published on pages 214-215, Table 9 of the Soil Survey of Box Elder County, Utah, Eastern Part. The pH values in the typical pedon are from the original field description.