LOCATION REDMORE IDEstablished Series
TAXONOMIC CLASS: Fine, smectitic, mesic Typic Natrixerolls
TYPICAL PEDON: Redmore silt loam -- on a 2 percent slope at 2,645 feet elevation in a cultivated field. When described on August 30, 1985 the soil was moist throughout. (Colors are for dry soil unless otherwise stated).
Ap--0 to 8 inches; dark grayish brown (10YR 4/2) silt loam, black (10YR 2/1) moist; weak coarse angular blocky structure parting to moderate fine subangular blocky; slightly hard, friable, nonsticky and slightly plastic; many very fine and fine roots; few very fine tubular pores; strongly acid (pH 5.3); clear smooth boundary. (6 to 10 inches thick)
A--8 to 12 inches; dark grayish brown (10YR 4/2) silt loam, black (10YR 2/1) moist; weak medium subangular blocky structure; slightly hard, very friable, nonsticky and slightly plastic; common very fine and fine roots; common very fine tubular pores; moderately acid (pH 5.7); abrupt wavy boundary. (0 to 8 inches thick)
Btn1--12 to 16 inches; very dark grayish brown (10YR 3/2) silty clay, black (10YR 2/1) moist, dark brown (10YR 4/3) crushed, very dark grayish brown (10YR 3/2) moist, crushed; moderate medium prismatic structure parting to strong medium angular blocky; very hard, firm, very sticky and very plastic; common fine and very fine roots; few very fine and fine tubular pores; many distinct discontinuous clay films on faces of peds; many black (10YR 2/1) organic coats on faces of peds; exchangeable sodium percentage of 11; slightly alkaline (pH 7.7); clear wavy boundary.
Btn2--16 to 19 inches; brown (10YR 4/3) silty clay loam, dark brown (10YR 3/3) moist, yellowish brown (10YR 5/4) and dark yellowish brown (10YR 3/4) moist, crushed; moderate medium prismatic structure parting to strong medium angular blocky; very hard, firm, very sticky and very plastic; common fine and very fine roots; common very fine tubular pores; many distinct discontinuous clay films on faces of peds; common black (10YR 2/1) organic coats on faces of peds; exchangeable sodium percentage of 15; strongly alkaline (pH 8.6); clear wavy boundary. (combined thickness of the Btn horizons is 6 to 18 inches)
Btkn--19 to 28 inches; yellowish brown (10YR 5/4) silty clay loam, dark yellowish brown (10YR 3/4) moist; moderate medium prismatic structure parting to moderate medium angular blocky; hard, friable, sticky and plastic; few fine and very fine roots; common very fine tubular pores; common faint and distinct discontinuous clay films on faces of peds; slightly effervescent from disseminated lime, strongly effervescent in common fine seams (3 percent calcium carbonate equivalent); exchangeable sodium percentage of 13; strongly alkaline (pH 8.6); clear wavy boundary. (2 to 12 inches thick)
Bkn1--28 to 35 inches; yellowish brown (10YR 5/4) silty clay loam, dark brown (10YR 4/3) moist; weak fine prismatic structure; slightly hard, friable, slightly sticky and slightly plastic; few very fine roots; common very fine tubular pores; slightly effervescent from disseminated lime and violently effervescent in fine and medium filaments (4 percent calcium carbonate equivalent); 5 percent gravel; exchangeable sodium percentage of 25; strongly alkaline (pH 8.9); clear wavy boundary. (4 to 12 inches thick)
2Bkn2--35 to 42 inches; white (10YR 8/2) silt loam, pale brown (10YR 6/3) moist; massive; soft, very friable, nonsticky and slightly plastic; many fine and very fine tubular pores; violently effervescent from disseminated lime (40 percent calcium carbonate equivalent); 5 percent gravel and indurated durinodes; exchangeable sodium percentage of 23; strongly alkaline (pH 8.8); clear wavy boundary. (4 to 12 inches)
2Bkqn--42 to 46 inches; white (10YR 8/2) very gravelly sandy loam, pale brown (10YR 6/3) moist; massive; soft, very friable, nonsticky and slightly plastic; many fine and very fine tubular pores; violently effervescent from disseminated lime (80 percent calcium carbonate equivalent); 30 percent gravel and 10 percent cobbles, including basalt fragments and indurated durinodes; exchangeable sodium percentage of 15; strongly alkaline (pH 8.6); abrupt wavy boundary. (0 to 10 inches thick)
2Ckqm--46 to 60 inches; white (10YR 8/2) indurated duripan, brown (10YR 5/3) moist; very thick platy structure with lenses of loamy soil between plates; extremely hard, extremely firm; violently effervescent from disseminated lime; strongly alkaline (pH 8.8).
TYPE LOCATION: Nez Perce County, Idaho; about 10 miles southeast of Lewiston; about 2,420 feet north and 900 feet east of the southwest corner of section 25, T. 34 N., R. 5 W.; USGS Lewiston Orchards South topographic quadrangle; Latitude 46 degrees 15 minutes 40 seconds north, longitude 116 degrees 54 minutes 45 seconds west.
RANGE IN CHARACTERISTICS:
Thickness of mollic epipedon - 15 to 20 inches
Depth to natric horizon - 8 to 16 inches
Depth to Bk horizon - 20 to 30 inches
Depth to duripan - 40 to 55 inches
Average annual soil temperature - 47 to 48 degrees F
Particle-size control section (weighted average)
Clay content - 35 to 45 percent
A horizon
Chroma - 1 or 2 moist
Reaction - strongly acid to slightly acid
Btn horizon Value - 3 to 5 dry, 2 to 4 moist
Chroma - 2 through 4, dry or moist
Texture - SICL, SIC
Clay content - 30 to 45 percent
Sodium adsorption ratio - 5 to 12
Exchangeable sodium - 8 to 20 percent
Reaction - slightly alkaline or moderately alkaline
Btkn horizon
Chroma - 3 or 4, dry or moist
Texture - SIL, SICL
Clay content - 26 to 35 percent
Sodium adsorption ratio - 10 to 20
Exchangeable sodium - 15 to 30 percent
Reaction - strongly alkaline or very strongly alkaline
Bkn horizon Value - 5 through 8 dry, 4 through 6 moist Chroma - 3 or 4, dry or moist Gravel content - 0 to 10 percent Texture - SIL, SICL Clay content - 26 to 35 percent Sodium adsorption ratio - 13 to 20 Exchangeable sodium - 10 to 30 percent Reaction - strongly alkaline or very strongly alkaline
2Bkn horizon Texture - SIL, L Gravel content - 0 to 10 percent Clay content - 14 to 25 percent Sodium adsorption ratio - 13 to 20 Exchangeable sodium - 10 to 30 percent Reaction - strongly alkaline or very strongly alkaline
2Bkqn horizon Coarse fragment content - 30 to 55 percent
COMPETING SERIES: This is the Alturas series. Alturas soils are very deep and have redoximorphic concentrations below a depth of 30 inches.
GEOGRAPHIC SETTING: Redmore soils are on hills on basalt plateaus. Slopes range from 1 to 6 percent. These soils formed in loess and material weathered from basalt. Elevation ranges from 2,450 to 2,800 feet. Average annual precipitation is 16 to 18 inches, average annual temperature is 49 to 50 degrees F., and the frost free period is 130 to 140 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Broadax, Bryden, and Nez Perce series. Broadax soils are on north- and east-facing hillsides and are very deep and do not have a natric horizon. Bryden soils are on similar landform positions at lower elevations, and are moderately deep to a duripan. Nez Perce soils are on similar landform positions at higher elevations, and are very deep and have an albic horizon.
DRAINAGE AND PERMEABILITY: Moderately well drained; slow to rapid runoff; slow permeability.
USE AND VEGETATION: These soils are used for cropland, mainly for wheat, barley, and peas. Native vegetation is mainly Idaho fescue and bluebunch wheatgrass.
DISTRIBUTION AND EXTENT: Northern Idaho. This soil is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Nez Perce County, Idaho, 1995.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - from the surface to 19 inches (the Ap, A, Btn1, and Btn2 horizons).
Natric horizon - from 12 to 28 inches (the Btn1, Btn2, and Btkn horizons).
Calcic horizon - from 35 to 46 inches (the 2Bkn2 and 2Bkqn horizons).
Particle-size control section - the zone from 12 to 28 inches (the Btn1 and Btn2 horizons).
Indurated duripan - from 46 to 60 inches (the 2Ckqm horizon)
ADDITIONAL DATA: This series has been sampled by NSSL. Laboratory sample number 85P 979, soil survey sample number S85ID-069-001.