LOCATION IZEE OREstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, frigid Vitrandic Haploxerolls
TYPICAL PEDON: Izee channery ashy loam, range. (Colors are for dry soil unless otherwise noted.)
A1--0 to 7 inches; grayish brown (10YR 5/2) channery ashy loam, very dark brown (10YR 2/2) moist; weak fine granular structure; soft, very friable, slightly sticky and slightly plastic; many roots throughout; many pores; 20 percent channers; neutral (pH 6.6); clear smooth boundary.
A2--7 to 15 inches; dark grayish brown (10YR 4/2) channery ashy loam, very dark grayish brown (10YR 3/2) moist; weak fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; many roots throughout; many very fine tubular pores; 20 percent channers; neutral (pH 6.6); clear smooth boundary. (Combined thickness of the A horizon (7 to 20 inches thick)
2Bw1--15 to 25 inches; brown (10YR 5/3) channery loam, very dark grayish brown (10YR 3/2) moist; moderate fine and medium subangular blocky structure; hard, firm, slightly sticky and slightly plastic; common roots throughout; many very fine tubular pores; 25 percent channers; neutral (pH 6.6); clear smooth boundary. (5 to 12 inches thick)
2Bw2--25 to 35 inches; brown (10YR 5/3) channery loam, very dark grayish brown (10YR 3/2) moist; moderate fine and medium subangular blocky structure; hard, firm, slightly sticky and slightly plastic; few roots throughout; common very fine tubular pores; 25 percent channers fragments; neutral (pH 6.6); abrupt smooth boundary. (5 to 12 inches thick)
2Cr--35 to 38 inches; fractured moderately cemented shale; clear wavy boundary. (2 to 10 inches thick)
2R--38 inches; indurated shale
TYPE LOCATION: Grant County, Oregon; About 800 feet east and 450 feet north of the south corner of sec. 27, T. 17E, and R. 28E in the SE1/4 SW1/4 SW1/4.
Latitude: 44 degrees, 3 minutes, 46.0 seconds North
Longitude: 119 degrees, 21 minutes, 13.0 West
NAD83
Easting: 311,498
Northing: 4,881,538
NAD 83
Zone 11
RANGE IN CHARACTERISTICS:
Mean annual soil temperature - 42 to 47 degrees F
Soil moisture - dry 60 to 90 consecutive days following the summer solstice
Depth to paralithic contact - 20 to 40 inches
Mollic epipedon - 20 to 40 inches thick
Particle size control section clay content (weighted average): 18 to 27 percent
Particle size control section rock fragment content ( weighted average): 0 to 30 percent Thickness of volcanic ash influenced layers - 7 to 20 inches
Estimated properties of volcanic ash influenced layers:
Volcanic glass content in the 0.02 to 2.0 mm fraction - 5 to 20 percent
Ammonium oxalate extractable Al plus 1/2 Fe - 0.4 to 1.0 percent
A horizons
Value - 2 or 3 moist, 4 or 5 dry
Chroma - 1 to 3 moist, 2 or 3 dry
Fine-earth textures - ashy loam or ashy sandy loam
Clay content - 15 to 27 percent
Channer content - 0 to 30 percent
Flagstone content - 0 to 10 percent
Total rock fragment content - 0 to 30 percent
Bw horizons
Value - 2 or 3 moist, 4 or 5 dry
Chroma - 1 to 3 moist, 2 or 3 dry
Fine-earth texture- loam, sandy loam, or sandy clay loam
Clay content - 15 to 30 percent
Channer content - 0 to 30 percent
Flagstone content - 0 to 10 percent
Total rock fragment content - 0 to 30 percent
COMPETING SERIES: These are the Albee, Goodalfs, Utley, Wallowa, and Wrightman series. Albee, Wallowa, and Wrightman soils are moderately deep to lithic basalt and do not contain channers. Goodalfs are very deep. Utley soils are deep and very deep.
GEOGRAPHIC SETTING:
Landform - Izee soils are on north facing backslopes, footslopes, sideslopes, and headslopes on hills
Slope gradient - 0 to 65 percent
Parent material - colluvium and residuum derived from channery shale, sandstone, limestone, and conglomerate with an influence of volcanic ash in the surface
Elevation - 3400 to 5500 feet
Climate - cold, wet winters and hot, dry summers
Mean annual precipitation - 12 to 16 inches
Mean annual temperature - 39 to 46 degrees F.
Frost-free period - 40 to 70 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Gerow, Keerins, Logdell, and Utley soils. Gerow soils are very deep somewhat poorly drained and occur in drainageways. Keerins soils are shallow or very shallow and occur on convex crests, nose slopes, and sideslopes. Logdell soils occur on convex nose slopes and crests and have a base saturation less than 75 percent in one or more horizons. Utley soils are deep and very deep and occur on toeslopes, footslopes, and baseslopes.
DRAINAGE AND PERMEABILITY: Well drained; medium or rapid runoff; moderate permeability.
USE AND VEGETATION: Izee soils are used for livestock grazing and wildlife habitat. The potential native vegetation is Idaho fescue, bluebunch wheatgrass, mountain big sagebrush, antelope bitterbrush, and gray rabbitbrush.
DISTRIBUTION AND EXTENT: Central and East Central Oregon, MLRA 10. This soil is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon.
SERIES ESTABLISHED: Grant County, Oregon, 1970.
REMARKS: Diagnostic horizons and other features:
Mollic epipedon (pachic) - zone from 0 to 35 inches, (A1, A2, Bw1, and Bw2 horizons)
Vitrandic feature - zone from 0 to 15 inches (A1 and A2 horizons)
Particle size control section - 10 to 35 inches
04/2010- The classification of the Izee official series description was updated from a fine-loamy, mixed, superactive, frigid Pachic Haploxerolls to a fine-loamy, mixed, superactive, frigid Vitrandic Haploxerolls