LOCATION GRIVER NV UTEstablished Series
TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, calcareous, mesic Aquic Torrifluvents
TYPICAL PEDON: Griver loam--rangeland (Colors for dry conditions unless otherwise noted.)
A--0 to 5 cm; grayish brown (10YR 5/2) loam, very dark grayish brown (10YR 3/2) moist; massive; soft, very friable, nonsticky and slightly plastic; few very fine roots; many very fine interstitial, and common very fine tubular pores; slightly effervescent; moderately alkaline (pH 8.4); abrupt smooth boundary. (0 to 10 cm thick)
C--5 to 36 cm; light brownish gray (10YR 6/2) very fine sandy loam, dark grayish brown (10YR 4/2) moist; massive; slightly hard, very friable, nonsticky and nonplastic; plentiful very fine, and few fine and medium roots; many very fine interstitial, and few very fine tubular pores; slightly effervescent; moderately alkaline (pH 8.4); abrupt wavy boundary. (20 to 50 cm thick)
2C--36 to 64 cm; light brownish gray (10YR 6/2) loamy fine sand, dark grayish brown (10YR 4/2) moist; massive; soft, very friable, nonsticky and nonplastic; common very fine, and few fine and medium roots; many very fine interstitial, and few very fine tubular pores; slightly effervescent; moderately alkaline (pH 8.4); abrupt smooth boundary. (25 to 50 cm thick)
3Ab--64 to 94 cm; light brownish gray (10YR 6/2) very fine sandy loam, very dark grayish brown (10YR 3/2) moist, with common fine distinct brown (10YR 4/3) moist masses of iron concentrations; massive; slightly hard, very friable, nonsticky and nonplastic; few very fine, fine and medium roots; many very fine interstitial, and few very fine tubular pores; slightly effervescent; moderately alkaline (pH 8.4); abrupt wavy boundary. (0 to 38 cm thick)
4C--94 to 152 cm; light brownish gray (10YR 6/2) very gravelly sand, dark grayish brown (10YR 4/2) moist; single grain; loose, loose, nonsticky and nonplastic; few very fine roots; many very fine and fine interstitial pores; 35 percent gravels; very slightly effervescent; moderately alkaline (pH 8.4)
TYPE LOCATION: Lander County, Nevada. Approximately 2,300 feet west and 1,900 feet south of the apparent northeast corner of section 35, T. 33 N., R. 47 E., Mount Diable base line and meridian; latitude 40 degrees 41 minutes 33 seconds N and longitude 116 degrees 38 minutes 29 seconds W; NAD 83.
RANGE IN CHARACTERISTICS:
Soil moisture: Soil is saturated at depths of 50 to 100 cm during the spring runoff in most years; aridic bordering on xeric soil moisture regime.
Mean annual soil temperature: 9 to 12 degrees C.
Reaction: Moderately alkaline or strongly alkaline and remains constant with depth, but may vary erratically with strata of different texture.
Effervescence: Very slightly effervescent through violently effervescent.
Other features: One or more buried A horizons are common. Saline and alkali phases are recognized.
Particle-size control section - Clay content: Averages 10 to 18 percent.
Rock fragments: 0 to 35 percent.
A horizon
Value: 5 or 6 dry and 3 or 4 moist.
Structure: massive or weak or moderate very thin to medium platy structure.
C horizons
Value: 3 to 6, moist and 4 to 7 dry.
Chroma: 2 or 3.
Texture: Stratified silt loam, loam, very fine sandy loam, fine sandy loam, sandy loam, loamy fine sand and loamy sand. Some pedons contain thin strata of contrasting finer textures or gravelly sand. Textures normally become coarser with depth but some areas have strata of dense unconforming clay below 100 cm.
Redox features: Few to many masses of iron depletions or concentrations are present at depths between 50 and 90 cm.
COMPETING SERIES: There are no other series in this family.
GEOGRAPHIC SETTING: Griver soils are on flood plains and relict levees at elevations of 1,370 to 1,620 meters. Slopes are 0 to 2 percent. The soils formed in alluvium derived from mixed volcanic and sedimentary rocks. The climate is cool and semiarid with moist winters and dry summers. The mean annual precipitation is 150 to 300 mm; mean annual temperature is 8.0 to 10.5 degrees C; and the frost-free season is about l00 to 140 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Coit and Rose Creek series. Colt and Rose Creek soils have mollic epipedons. Coit soils also have fine-loamy particle-size control section.
DRAINAGE AND PERMEABILITY: Poorly or somewhat poorly drained; low runoff; moderately rapid permeability; moderately high saturated hydraulic conductivity. Water tables are at depths of 50 to 100 cm during the spring runoff in most years. Some areas have been partially drained. These drained phases commonly have a water table between 100 and 150 cm during the spring months in most years. The soils are subject to rare to frequent overflow.
USE AND VEGETATION: Used mainly for livestock grazing and wildlife habitat. Small areas are irrigated and the native grasses cut for hay. The present vegetation is mainly rubber rabbitbrush, big sagebrush, willows, wild rose, bluejoint reedgrass and poverty weed.
DISTRIBUTION AND EXTENT: North Central Nevada. Griver soils are of small extent. MLRA 25, 28A.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona
SERIES ESTABLISHED: Lander County, (Tuscarora Mountain Area), Nevada, 1974.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - The zone from the surface to 5 cm (A horizon).
Redoximorphic features - The zone from 64 to 94 cm (3Ab horizon).
Particle-size control section - The zone from 25 to 100 cm (2C, 3Ab and parts of the C and 3C horizons).