LOCATION ARLOVAL IDEstablished Series
TAXONOMIC CLASS: Mixed, mesic Typic Psammaquents
TYPIFYING PEDON: Arloval loamy fine sand, cultivated. (Colors are for dry soil unless otherwise noted.)
Ap--0 to 10 inches; grayish brown (10YR 5/2), light brownish gray (10YR 6/2 crushed) loamy fine sand, very dark grayish brown (10YR 3/2) dark grayish brown (10YR 4/2 crushed) moist; few fine faint brown (10YR 5/3) masses of iron accumulation; massive; soft, very friable, nonsticky and nonplastic; many fine and very fine and common medium roots; many very fine interstitial and common very fine tubular pores; slightly alkaline (pH 7.4); abrupt smooth boundary. (6 to 10 inches thick)
AC--10 to 23 inches; light brownish gray (10YR 6/2) loamy fine sand, dark grayish brown (10YR 4/2) moist; common fine distinct strong brown (7.5YR 5/6) and brown (10YR 5/3) masses of iron accumulation and depletion, dark brown (7.5YR 4/4 and 7.5YR 3/2) and very dark brown (10YR 2/2) moist; very weak medium subangular blocky structure; slightly hard, very friable, nonsticky and nonplastic; common very fine and fine and few medium roots; many very fine irregular and common very fine tubular pores; in places, slightly effervescent and few fine spots and veins of lime; slightly alkaline (pH 7.4); clear smooth boundary. (0 to 15 inches thick)
C1--23 to 35 inches; light brownish gray (10YR 6/2) loamy fine sand, dark grayish brown (10YR 4/2) moist; many fine distinct brown (7.5YR 4/2) and dark grayish brown (10YR 4/2) masses of iron depletion, dark brown (7.5YR 3/2) and very dark brown (10YR 2/2) moist; few prominent brown (7.5YR 5/4 and 7.5YR 4/3) and reddish brown (5YR 5/4) masses of iron accumulation, dark brown (7.5YR 3/3) and reddish brown (5YR 4/4) moist; massive; slightly hard, very friable, nonsticky and nonplastic; common very fine tubular pores; noncalcareous except very few fine spots of lime in upper part; slightly alkaline (pH 7.4); gradual wavy boundary. (0 to 15 inches thick)
C2--35 to 52 inches; light brownish gray (10YR 6/2) loamy fine sand, dark grayish brown (10YR 4/2) moist; few fine distinct light yellowish brown (10YR 6/4) masses of iron depletion, yellowish brown (10YR 5/4) moist; few fine faint brown (10YR 5/3) masses of iron accumulation, dark yellowish brown (10YR 4/4) moist; massive; slightly hard, very friable, nonsticky and nonplastic; many very fine irregular and common very fine tubular pores; 5 percent gravel; slightly alkaline (pH 7.4); gradual wavy boundary. (0 to 20 inches thick)
C3--52 to 60 inches; light brownish gray (10YR 6/2) loamy sand, dark grayish brown (10YR 4/2) moist; few faint masses of iron depletion; slightly hard, very friable, nonsticky and nonplastic; many very fine irregular and few very fine tubular pores; 5 percent gravel; slightly alkaline (pH 7.4).
TYPE LOCATION: Minidoka County, Idaho; about 2.25 miles south of Rupert and west of county road; 180 feet northwest of the southeast corner of the NE1/4 NE1/4 sec. 8, T.10S., R.24E. Latitude - 42 degrees, 34 minutes, 25 seconds North; Longitude - 113 degrees, 40 minutes, 02 seconds West.
RANGE IN CHARACTERISTICS:
Average annual soil temperature - 47 to 51 degrees F.
Reaction - slightly or moderately alkaline
Matrix (within 20 inches of the surface)
Hue - 10YR or 2.5Y
Chroma - 1 through 3 moist
Control section
Texture - LFS, LS
Gravel - 0 to 15 percent
Ap horizon
Value - 6 or 7 dry, 4 or 5 moist
Chroma - 2 or 3
Effervescence - none or slight
AC and C horizons
Value - 6 or 7 dry, 4 or 5 moist
Chroma - 2 or 3
Masses or iron accumulation
Abundance - common or many
Contrast - distinct or prominent
Clay content - 5 to 10 percent
Structure Type - subangular blocky or massive
Effervescence - none or slight
Reaction - slightly or moderately alkaline
COMPETING SERIES: These are the Carrolis, Conrad, Dair, Forbar, Gothenburg, Junius, Norway, Stafford, Tryon, Tyre and Wanser series. Carrolis series have developed in recent volcanic material (dredge material St. Helens) and have 5 to 20 percent glass. Conrad soils are very poorly drained. Dair soils have a much Oa horizon up to 8 inches thick. Forbar are very poorly drained and are fine sand throughout the profile. Gothenburg have gravelly textures within 20 inches of the soil surface. Junius soils are in a more moist humid climate regime. Norway soils are calcareous throughout. Strafford soils are extremely acid to slightly acid. Tryon soils have a solum less than 6 inches thick. Tyre soils are 20 to 40 inches to a paralithic contact. Wanser soils have a soil temperature of 51 or 54 degrees F and are moderately or strongly alkaline.
GEOGRAPHIC SETTING: Arloval soils are on low terraces with slopes ranging from 0 to 2 percent. Elevations are 3,000 to 4,200 feet. The soils formed in stratified sandy alluvium from mixed sources and high in quartz. The climate is semiarid with relatively dry summers. The average annual precipitation is 8 to 11 inches. The frost-free period is 125 to 140 days. The averate annual temperature is 45 to 49 degrees F.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Decker, Quincy, Schodson, Tindahay and Wodskow soils. Decker soils have loamy control sections and calcic horizons, and lack the wetness and colors of the Aquents. Quincy and Tindahay soils lack the wetness and colors of the Aquents. Schodson soils have moderately coarse textures to depths of 25 to 35 inches.
DRAINAGE AND PERMEABILITY: Poorly drained; rapid permeability, water table is at depths of 10 to 30 inches during the summer. Water table is induced from irrigation.
USE AND VEGETATION: Used mainly for cropland. Crops include sugar beets, pasture, alfalfa, corn, wheat, and barley.
DISTRIBUTION AND EXTENT: South-central Idaho. The series is inextensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Minidoka County, Idaho, 1973.
REMARKS: Diagnostic horizons and other features:
- Ochric epipedon -
- Texture is too coarse for a cambic horizon
- Aquic moisture regime - moist matrix color of 4/2 with common distinct iron concentrations at 10 inches