LOCATION FEEDER                  ID

Tentative Series
IRD. BAG/FRK
05/2015

FEEDER SERIES

The Feeder series consists of very deep, well drained soils that formed in loess and loess influenced alluvium. Feeder soils have slopes of 0 to 40 percent and are on hillslopes, fan remnants, and valley floors. The mean annual precipitation is about 380 millimeters and the mean annual air temperature is about 4 degrees C.

TAXONOMIC CLASS: Coarse-silty, mixed, superactive, frigid Typic Calcixerepts

TYPICAL PEDON: Feeder silt loam, located on an east facing slightly concave slope of 8 percent and elevation of 1,670 meters; when described on June 6, 1989, the soil was dry throughout (Colors are for air-dry soil unless otherwise noted)

A--0 to 10 cm; pale brown (10YR 6/3) silt loam, dark brown (10YR 3/3) moist; moderate thin platy parting to moderate very fine granular structure; soft, very friable, slightly sticky and slightly plastic; common very fine roots; many very fine irregular pores; strongly effervescent; strongly alkaline (pH 8.6); abrupt smooth boundary

Bw--10 to 30 cm; pale brown (10YR 6/3) silt loam, dark brown (10YR 3/3) moist; moderate medium and coarse subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; few very fine roots; many very fine tubular pores; violently effervescent; moderately alkaline (pH 8.3); clear smooth boundary

Bk1--30 to 66 cm; very pale brown (10YR 7/3) silt loam, brown (10YR 5/3) moist; moderate fine and medium subangular blocky structure; slightly hard, friable, slightly sticky and moderately plastic; few very fine roots; many very fine and few fine tubular pores; common fine threadlike and irregular calcium carbonate masses and many weakly cemented calcium carbonate nodules; violently effervescent; moderately alkaline (pH 8.2); clear wavy boundary

Bk2--66 to 142 cm; very pale brown (10YR 7/3) silt loam, brown (10YR 4/3) moist; massive; slightly hard, very friable, slightly sticky and slightly plastic; few very fine roots; many very fine, common medium, and few fine tubular pores; few fine threadlike and irregular calcium carbonate masses; strongly effervescent; moderately alkaline (pH 8.2); gradual wavy boundary

Bk3--142 to 168 cm; light yellowish brown (10YR 6/4) silt loam, brown (10YR 5/3) moist; massive; slightly hard, friable, slightly sticky and slightly plastic; few very fine roots; many very fine tubular pores; common fine threadlike calcium carbonate masses; violently effervescent; moderately alkaline (pH 8.4)

TYPE LOCATION: Caribou County, Idaho; about 6.5 kilometers northwest of Chesterfield, Idaho; 780 meters east and 468 meters south of the northwest corner, sec. 23, T.6S., R.38E., Boise Meridian; Chesterfield Reservoir, Idaho USGS quadrangle; 42.8872 degrees north latitude, 111.9744 degrees west longitude WGS84; UTM 420429 meters east, 4748751 meters north, zone 12N

RANGE IN CHARACTERISTICS:
Mean annual soil temperature - 5 to 8 degrees C
Particle-size control section - 8 to 18 percent clay

A horizon
Value - 5 or 6 dry, 3 or 4 moist
Chroma - 2 or 3 dry or moist
Clay content - 10 to 18 percent
Effervescence - Strongly or violently effervescent
Reaction (pH) - 7.8 to 8.9
Thickness - 3 to 15 cm

Bw horizon
Value - 5 or 6 dry, 3 to 5 moist
Chroma - 3 or 4 dry or moist
Clay content - 10 to 18 percent
Calcium carbonate equivalent - 10 to 25 percent
Effervescence - Strongly or violently effervescent
Reaction (pH) - 7.9 to 8.5
Thickness - 15 to 25 cm

Bk horizons
Value - 6 to 8 dry, 4 to 6 moist
Chroma - 2 to 4 dry or moist
Clay content - 8 to 18 percent
Calcium carbonate equivalent - 20 to 35 percent
Effervescence - Strongly or violently effervescent
Reaction (pH) - 8.0 to 8.9

C horizon (when present)
Value - 6 to 8 dry, 5 or 6 moist
Chroma - 2 to 4 dry or moist
Texture - Silt loam, very fine sandy loam
Calcium carbonate equivalent - 15 to 30 percent
Effervescence - Strongly or violently effervescent
Reaction (pH) - 7.9 to 8.7

COMPETING SERIES: There are no competing series

GEOGRAPHIC SETTING:
Parent material - Loess and loess influenced alluvium
Landscape - Hills and valleys
Landform - Hillslopes, fan remnants, valley floors
Slope - 0 to 40 percent
Elevation - 1,475 to 2,300 meters
Climate - Warm, dry summers; cool, moist winters
Mean annual precipitation - 330 to 500 mm
Mean annual air temperature - 3 to 7 degrees C
Frost free duration - 60 to 110 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Iphil - Mollic epipedon; lower on landform in concave positions
Ririe- Mollic epipedon; north and east facing slopes in concave positions
Rexburg- Mollic epipedon; north and east facing slopes in concave positions

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: (Ksat)
Drainage class - Well
Ksat - Moderately high

USE AND VEGETATION:
Use - Livestock grazing, wildlife habitat, common crops of wheat, barley, potatoes, alfalfa
Potential natural vegetation - Mountain big sagebrush, Wyoming big sagebrush, bluebunch wheatgrass, Sandberg bluegrass

DISTRIBUTION AND EXTENT: Eastern Idaho Plateaus, Idaho; MLRA 13; small extent

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon

SERIES PROPOSED: Caribou County, Idaho, 2015; name is taken from a nearby canal

REMARKS:
Particle-size control section - 25 to 100 cm
Ochric epipedon
Cambic horizon - 10 to 30 cm
Calcic horizon - 30 to 168 cm
Soil moisture regime - Xeric

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National Cooperative Soil Survey
U.S.A.