LOCATION JODERO                  CO+UT

Established Series
Rev. GB/RJL/JWB
04/2011

JODERO SERIES

The Jodero series consists of deep, well drained soils that formed in thick, calcareous alluvium from rhyolite, andesite, dacite, basalt, tuff, or trachite. Jodero soils are on stream terraces, concave drainageways, fan skirts, fan remnants, and concave portions of alluvial fans with slopes of 0 to 15 percent. The mean annual precipitation is about 12 inches (305 mm) and the mean annual temperature is about 42 degrees F (5.6 degrees C).

TAXONOMIC CLASS: Fine-loamy, mixed, superactive, frigid Cumulic Haplustolls

TYPICAL PEDON: Jodero loam - grassland. (Colors are for dry soil unless otherwise noted.)

A1--0 to 8 inches (0 to 20 cm); brown (10YR 5/3) loam, dark brown (10YR 3/3) moist; strong medium granular structure; soft, very friable; 5 percent gravel; slightly alkaline (pH 7.6); gradual wavy boundary. (5 to 10 inches (13 to 25 cm thick)

A2--8 to 24 inches (20 to 61 cm); grayish brown (10YR 5/2) loam, very dark grayish brown (10YR 3/2) moist; moderate coarse subangular blocky structure parting to moderate medium granular; slightly hard, very friable; peds are hard; 5 percent gravel; slightly alkaline (pH 7.6); clear wavy boundary. (10 to 35 inches (25 to 89 cm) thick)

A3--24 to 60 inches (20 to 152 cm); grayish brown (10YR 5/2) loam stratified with thin lenses of fine sandy loam, very dark grayish brown (10YR 3/2) moist; moderate coarse subangular blocky structure; slightly hard, very friable; peds are very hard; few thin glossy patches on some faces of peds and in root channels; strongly effervescent; moderately alkaline (pH 8.2); gradual wavy boundary. (25 to 40 inches 64 to 102 cm) thick)

C--60 to 70 inches (152 to 178 cm); light brownish gray (10YR 6/2) loam stratified with thin lenses of fine sandy loam, dark grayish brown (10YR 4/2) moist; massive; hard, friable; few medium prominent yellowish brown (10YR 5/6) masses of iron; 5 percent gravel; strongly effervescent; moderately alkaline (pH 8.2).

TYPE LOCATION: Rio Grande County, Colorado; SW1/4 of Sec. 34, T. 39 N., R. 6 E.

RANGE IN CHARACTERISTICS:

Soil moisture: These soils are usually moist in some part of the soil moisture control section in some part during the late winter and spring and sporadically throughout the summer and early fall due to convection storms. (Ustic soil moisture regime bordering aridic.)

Mean annual soil temperature: 41 to 46 degrees F. (5.0 to 7.8 degrees C.)
Mean summer soil temperature: 60 to 62 degrees F. (15.5 to 16.7 degrees C.)
Thickness of the mollic epipedon: 40 to more than 60 inches (102 to 152 cm)
Depth to carbonates: 10 to 40 inches (25 to 102 cm); some pedons may be calcareous to the surface.
Particle-size control section (weighted average):
Clay content: 18 to 27 percent
Rock fragments: 0 to 15 percent (dominantly gravel and cobbles); some pedons have sandy-skeletal materials below 40 inches (102 cm) in depth.
Fine and coarser sand: 15 to 35 percent
Reaction: slightly acid to moderately alkaline


A horizon:
Hue: 5Y through 7.5YR
Value: 4 or 5 dry, 2 or 3 moist
Chroma: 1 through 3
Texture: loam, silty clay loam, sandy loam

C horizon, (AC or 2C horizons are present in some pedons):
Hue: 5Y through 7.5YR
Value: 4 through 6 dry, 2 through 5 moist
Chroma: 2 or 3
Texture: stratified loamy sand to silty clay loam with dominant textures of loam, very fine sandy loam and sandy loam
Rock fragments: 0 to 35 percent; some pedons have greater than 35 percent below 40 inches (102 cm) in depth
Redoximorphic features: distinct or prominent masses of iron and/or manganese in the lower part of the C horizon with chroma greater than 2.

COMPETING SERIES: These are the Breezebasin (T CO), Brycan (UT), Cordeston (WY), Dalmatian (CO), Enbar (MT), Jode (T CO), Mcgaffey (NM), Nutrioso (AZ), Pinridge (CO), Polich (NM), Staad (MT), and Straw (MT) series. Brycan soils have a cambic horizon. Cordeston soils have carbonate at depths of 60 inches or more. Dalmatian soils have low chroma redoximorphic features at 40 to 60 inches (102 to 152 cm) in depth. Enbar and Polich soils have redox concentrations and seasonal high water tables within 100 cm.. Jode[r1] soils have accumulations of secondary carbonate in the particle size control section and typic ustic soil moisture regimes. McGaffey soils have hue of 5YR or redder in more than half the profile. Breezebasin, Nutrioso, Pinridge, Staad, and Straw soils have mollic epipedons less than 40 inches (100 cm) thick.

GEOGRAPHIC SETTING: Jodero soils are on stream terraces, concave drainageways, fan skirts, fan remnants, and the concave portions of alluvial fans. Elevations range from 5,700 to 9,200 feet (1737 to 2,804 m). Slopes range from 0 to 15 percent. These soils formed in thick, calcareous alluvium derived primarily from rhyolite, andesite, gneiss, dacite, basalt, tuff, and trachite. The mean annual precipitation is 8 to 16 inches (200 to 406 mm) with peak periods of precipitation during the spring and summer months. Mean annual temperature is 39 to 45 degrees F. (3.9 to 7.2 degrees C.), mean summer temperature is 59 to 61 degrees F. (15.0 to 16.1 degrees C.), and the freeze-free period is 60 to 110 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Shawa and Villa Grove soils. Shawa soils have chroma of less than 1.5 in the upper part of the mollic epipedon. Villa Grove soils have an argillic horizon.

DRAINAGE AND PERMEABILITY: Well-drained; medium runoff; moderate permeability; Ksat class is moderately high.

USE AND VEGETATION: These soils are used principally as native pastureland. Principal native plants are rabbitbrush, blue grama, western wheatgrass, and snakeweed. These soils are correlated to upland ecological sites in Utah.

DISTRIBUTION AND EXTENT: San Luis Valley Area of south-central Colorado. The series is of small extent.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana

SERIES ESTABLISHED: Rio Grande County Area, Colorado, 1972.

Taxonomy Version: Eleventh Edition, 2010.

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National Cooperative Soil Survey
U.S.A.