LOCATION DORS IDEstablished Series
The Dors series consists of very deep, well-drained soils on fan
terraces. They formed in alluvium from mixed sources. Permeability is
moderately rapid. Slopes are 0 to 20 percent. The average annual
precipitation is about 7 inches, and the average annual temperature is
about 52 degrees F.
TAXONOMIC CLASS: Coarse-loamy over sandy or sandy-skeletal, mixed, superactive, mesic Typic Haplocalcids
mesic, Typic Calciorthids.
TYPICAL PEDON: Dors fine sandy loam - rangeland. (Colors are for dry
soil unless otherwise noted.)
A1--0 to 1 inch; light brownish gray (10YR 6/2) fine sandy loam,
dark grayish brown (10YR 4/2) moist; weak thick platy structure parting
to weak very fine granular; soft, very friable; few fine roots; few
fine vesicular pores; moderately alkaline (pH 8.0); abrupt smooth
boundary. (0 to 6 inches thick)
A2--1 to 5 inches; pale brown (10YR 6/3) fine sandy loam, dark
brown (10YR 4/3) moist; weak fine platy structure; slightly hard, very
friable; few fine roots; few fine vesicular pores; strongly
effervescent; moderately alkaline (pH 8.0); abrupt smooth boundary. (3
to 8 inches thick)
Bk1--5 to 20 inches; pinkish gray (7.5YR 6/2) fine sandy loam, dark
grayish brown (10YR 4/2) moist; massive; hard, very friable; few fine
roots; few fine tubular pores; violently effervescent; mildly alkaline
(pH 7.8); clear smooth boundary. (8 to 18 inches thick)
Bk2--20 to 26 inches; very pale brown (10YR 8/3) fine sandy loam,
pale brown (10YR 6/3) moist; massive; hard, very friable; slightly
sticky and slightly plastic; few fine roots; few fine tubular pores;
violently effervescent; strongly alkaline (pH 8.6); abrupt smooth
boundary. (3 to 8 inches thick)
2Bk--26 to 60 inches; variegated very gravelly sand; single grain;
loose; 40 percent pebbles and 10 percent cobbles with calcium carbonate
coatings on undersides; slightly effervescent; moderately alkaline (pH
8.4).
TYPE LOCATION: Elmore County, Idaho, about 3-1/4 miles north of
Grandview; 1,000 feet east and 150 feet north of the southwest corner
of sec. 27, T. 4 S., R. 3 E.
RANGE IN CHARACTERISTICS:
Depth to contrasting textures - 20 to 40 inches
Average annual soil temperature - 52 to 56 degrees F
Depth to lime - 0 to 6 inches
A horizon
Value- 5 through 7 dry, 3 through 5 moist
Chroma- 2 or 3
Bk horizons
Color hue - 7.5YR or 10YR
Value- 6 through 8 dry, 4 through 6 moist
chroma- 2 or 3
Texture - L, FSL, or VFSL
2Bk horizon
Texture - GRV-LS, GRV-LCOS, GRV-S, GRV-COS
Percent pebbles - 35 to 60
Percent cobbles - 0 to 15
COMPETING SERIES: These are the similar Cencove and Marsing series.
Cencove and Marsing soils lack a calcic horizon.
GEOGRAPHIC SETTING: Dors soils are on fan terraces at elevations of
2,300 to 3,000. Slopes are 0 to 20 percent. These soils formed in
alluvium from mixed sources. The average annual precipitation is 6 to
8 inches, and the average annual temperature is 51 to 54 degrees. The
frost-free period is 130 to 150 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Hawsley, Mazuma,
McKeeth, Ornea, and Zerk soils. Mazuma soils lack sand and gravel
within 40 inches. Hawsley soils are sandy throughout. Zerk soils have
more than 35 percent rock fragments in the control section and Ornea
soils have an argillic horizon. McKeeth soils have an argillic horizon
and a layer of weak silica cementation. These soils all occupy
landscape positions similar to the Dors series.
DRAINAGE AND PERMEABILITY: Well drained; slow to moderately rapid
runoff; moderately rapid permeability.
USE AND VEGETATION: Dors soils are used for rangeland. A few areas
are irrigated. Vegetation in the potential natural plant community is
mainly shadscale, bud sagebrush, Indian ricegrass, bottlebrush
squirreltail, and Sandberg bluegrass with scattered areas of
greasewood.
DISTRIBUTION AND EXTENT: Southwestern Idaho. Dors soils are
moderately extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Elmore County Area, Idaho, 1986.
REMARKS: Diagnostic horizons and features recognized in this pedon
are:
Ochric epipedon - the zone from 0 to 5 inches (A horizons).
Calcic horizon - the zone from 5 to 26 inches (Bk horizons).
Particle-size control section - the zone from 10 to 40 inches.
National Cooperative Soil Survey