LOCATION KINGSRIVER NV

Established Series
Rev. TM-DD-RLB-JBF
02/2019

KINGSRIVER SERIES

The Kingsriver series consists of very deep, very poorly drained soils that formed in alluvium derived from mixed rocks. The Kingsriver soils are on flood plains and stream terraces. Slopes are commonly 0 to 2 percent. The mean annual precipitation is about 250 mm and the mean annual temperature is about 8 degrees C.

TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, mesic Cumulic Endoaquolls

TYPICAL PEDON: Kingsriver loam--native hayland. (Colors are for dry soil unless otherwise noted.)

A1--0 to 10 cm; dark grayish brown (10YR 4/2) loam, black (10YR 2/1) moist; moderate fine granular structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine and fine roots; many very fine interstitial and common fine and medium interstitial and tubular pores; slightly alkaline (pH 7.6); abrupt wavy boundary. (8 to 25 cm thick)

A2--10 to 30 cm; variegated dark grayish brown (10YR 4/2) and gray (10YR 5/1) loam, very dark brown (10YR 2/2) moist, many fine prominent strong brown (7.5YR 5/6), few fine distinct black (10YR 2/1) and few fine distinct dark gray (N 4/0) redox concentrations; strong fine subangular blocky structure parting to moderate fine granular; slightly hard, friable, slightly sticky and slightly plastic; many very fine and common fine roots; many very fine interstitial and common fine and medium interstitial and tubular pores; clean sand grains coat faces of ped; common worm tunnels and casts; slightly alkaline (pH 7.8); abrupt wavy boundary. (15 to 25 cm thick)

A3--30 to 51 cm; dark gray (10YR 4/1) loam, black (10YR 2/1) moist, common fine distinct dark yellowish brown (10YR 4/4) mottles; moderate fine subangular blocky structure parting to moderate fine granular; slightly hard, friable, slightly sticky and slightly plastic; common very fine and fine roots; many very fine, common fine, medium and coarse tubular pores; clean sand grains on faces of ped; common worm tunnels and casts; 5 percent gravel; moderately alkaline (pH 8.4); clear smooth boundary. (0 to 30 cm thick)

A4--51 to 74 cm; dark gray (10YR 4/1) loam, black (10YR 2/1) moist; moderate fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; few very fine and fine roots; many very fine and common fine, medium and coarse tubular pores; common worm tunnels and casts; few fine soft filaments of carbonate; strongly effervescent; 5 percent gravel; strongly alkaline (pH 8.6); clear smooth boundary. (0 to 38 cm thick)

2A5--74 to 109 cm; variegated gray (10YR 5/1) and grayish brown (2.5Y 5/2) sandy loam, very dark grayish brown (10YR 3/2) moist, few fine prominent black (N 2/0) redox concentrations; massive; slightly hard, very friable, slightly sticky and nonplastic; few very fine and fine roots; many very fine, common fine and few medium interstitial and tubular pores; strongly effervescent; 5 percent gravel; moderately alkaline (pH 8.4); clear smooth boundary. (0 to 50 cm thick)

3C--109 to 155 cm; light brownish gray (10YR 6/2) finely stratified sandy loam, brown (10YR 4/3) moist, few fine prominent black (N 2/0) mottles in the upper part; massive; soft, very friable, nonsticky and nonplastic; few very fine roots; many very fine and common fine interstitial and tubular pores; few fine soft filaments of carbonate; violently effervescent; 10 percent gravel; moderately alkaline (pH 8.4).

TYPE LOCATION: Humboldt County, Nevada; approximately 1.5 miles northeast of the Kings River Ranch headquarters; about 1950 feet east and 500 feet south of the Northwest corner, Section 22, T. 46 N., R. 33 E.; USGS Kings River Ranch 7.5 minute topographic quadrangle; latitude 41 degrees 51 minutes 37 seconds N and longitude 118 degrees 15 minutes 30 seconds W; WGS84 Decimal Degrees 41.8602778 latitude, -118.2583333 longitude.

RANGE IN CHARACTERISTICS:
Soil moisture: Saturated at or near the surface for long periods in the spring and summer due to seasonal high water table. Drained phases are recognized.
Mean annual soil temperature: 8 to 11 degrees C.
Mollic epipedon thickness: 76 to 152 cm.
Depth to carbonates: 46 to 100 cm.

Particle-size control Section - Clay content: 8 to 18 percent
Rock fragments: 0 to 10 percent, mainly fine gravel.

A horizons
Hue: 2.5Y, 10YR or N
Value: 4 or 5 dry, 2 or 3 moist
Chroma: 0 through 2
Reaction: Slightly alkaline through strongly alkaline; usually increases with depth.
Other features: Prominent or distinct redox concentration or gleying are present in the lower subhorizons.

C horizons
Hue: 10YR or 2.5Y
Value: 6 or 7 dry, 4 or 5 moist
Chroma: 1 through 3
Texture: Sandy loam, loam or fine sandy loam
Clay content: 8 to 18 percent
Rock fragments: 0 to 10 percent; mainly fine gravel
Consistence: Soft or slightly hard, dry
Reaction: Moderately alkaline or strongly alkaline
Other features: Distinct or prominent redox concentration are present in most pedons.

COMPETING SERIES: These are the Artray and Massack series. Artray soils average 60 to 75 percent, mainly medium through very coarse sand. Massack soils have slightly acid or neutral soil reaction and are noncalcareous throughout.

GEOGRAPHIC SETTING: Kingsriver soils are on flood plains and stream terraces. These soils formed in alluvium derived from mixed rocks. Slopes are commonly 0 to 2 percent. Elevations are 1,280 to 1,830 meters. The climate is cool, semiarid with cool, moist winters and warm, dry summers. The mean annual precipitation is 200 to 300 mm and mean annual temperature is 7 to 9 degrees C. The frost-free period is 80 to 110 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Rio King and Rodock series. These soils have aridic moisture regimes that border on xeric and have mollic epipedons that are less than 50 cm thick.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Very poorly drained; slow runoff; moderately high saturated hydraulic conductivity. Seasonal water table is 30 to 90 cm.

USE AND VEGETATION: Irrigated hayland, rangeland and wildlife habitat. The present vegetation is mainly creeping wildrye, basin wildrye and Baltic rush.

DISTRIBUTION AND EXTENT: Northwest Nevada. These soils are not extensive. MLRA 24, 25.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California

SERIES PROPOSED: Humboldt County, Nevada, (East Part), 1987.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - The zone from the soil surface to 109 cm (A1, A2, A3, A4 and 2A5 horizons).
Endosaturation - The zone from 10 to 51 cm (A2 and A3 horizons).
Redox concentrations - The zone from 74 to 109 cm (The 2A5 horizon).
Particle-size control section--The zone from 25 to 100 cm (part of the A2, A3, A4 and part of the 2A5 horizons).

Classification was changed in 1992 from Haplaquolls to Endoaquolls.

National Cooperative Soil Survey
U.S.A.