LOCATION JUMMER WATentative Series
TAXONOMIC CLASS: Loamy-skeletal, isotic, frigid Vitrandic Haploxeralfs
TYPICAL PEDON: Jummer very gravelly ashy sandy loam - forested, on a 63 percent southeast-facing slope at an elevation of 3,900 feet. (Colors are for dry soil unless otherwise stated. Textures are apparent field textures.)
Oi & Oe--0 to 1 inch; slightly decomposed and intermediately decomposed needles and twigs; abrupt smooth boundary. (1 to 2 inches thick)
A--1 to 4 inches; brown (10YR 4/3) very gravelly ashy sandy loam, very dark grayish brown (10YR 3/2) moist; weak fine granular structure; soft, very friable, nonsticky and nonplastic; many very fine roots; many very fine irregular pores; 35 percent pebbles and 5 percent cobbles; NaF pH 9.0; moderately acid (pH 5.9); abrupt smooth boundary. (2 to 6 inches thick)
Bw1--4 to 7 inches; brown (7.5YR 4/3) gravelly ashy sandy loam, dark brown (7.5YR 3/3) moist; weak very fine and fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; many very fine roots; many very fine irregular pores; 30 percent pebbles; NaF pH 9.0; moderately acid (pH 5.8); clear wavy boundary. (3 to 5 inches thick)
Bw2--7 to 21 inches; brown (7.5YR 5/4) moist; very gravelly ashy sandy loam, dark brown (7.5YR 3/4) weak fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; many very fine roots; many very fine irregular pores; 35 percent pebbles and 5 cobbles; NaF pH 9.0; moderately acid (pH 5.8); clear wavy boundary. (5 to 16 inches thick)
2Bt--21 to 34 inches; brown (7.5YR 5/4) extremely gravelly loam, dark brown (7.5YR 3/4) moist; soft, very friable, slightly sticky and slightly plastic; few coarse and very fine roots; many very fine irregular pores; few faint clay films and clay bridging in pores; 40 percent pebbles and 20 percent cobbles; NaF pH 8.4; moderately acid (pH 5.8); abrupt wavy boundary. (10 to 20 inches thick)
3R--34 inches; fractured Teanaway basalt.
TYPE LOCATION: Kittitas County, Washington, about 3 1/2 miles north of Lakedale; about 400 feet north and 1,400 feet east of the southwest corner of section 15, T. 21 N., R. 14 E.; USGS Cle Elum Lake, Washington topographic quadrangle; Latitude 47 degrees, 17 minutes, 48 seconds N. and Longitude 121 degrees, 4 minutes, 36 seconds W.
RANGE IN CHARACTERISTICS: The mean annual soil temperature at a depth of 20 inches is 45 to 47 degrees F. These soils are usually moist but are dry in all parts of the moisture control section for 45 to 60 consecutive days following the summer solstice. Thickness of soil with vitrandic properties is 10 to 22 inches and it has and estimated bulk density of 1.15 to 1.30 g/cc, glass content of 7 to 20 percent, acid oxalate extractable aluminum plus one-half acid oxalate extractable iron of 0.3 to 1.0 percent, and 15-bar water retention of 5 to 10 percent for air dried samples. The particle-size control section averages 15 to 26 percent clay and 60 to 75 percent rock fragments by volume. Base saturation (by NH4OAC) is estimated from 50 to 60 percent between depths of 10 and 30 inches below the soil surface. Depth to lithic contact is 20 to 40 inches. Reaction is moderately acid or strongly acid.
The A horizon has hue of 7.5YR or 10YR, value of 4 or 5 dry and chroma of 2 through 4 dry or moist.
The Bw horizon has hue of 7.5YR or 10YR, value of 5 or 6 dry, 3 or 4 moist, chroma of 4 through 6 dry and 3 or 4 moist. The upper part is very gravelly ashy sandy loam, gravelly ashy sandy loam or gravelly ashy loam. The lower part is very gravelly ashy sandy loam or very gravelly ashy loam.
The 2Bt horizon has hue of 7.5YR or 10YR, value of 5 or 6 dry, 3 or 4 moist and chroma of 4 through 6 dry or moist. It is extremely gravelly loam or extremely cobbly loam.
COMPETING SERIES: This is the Nicmar (T) series. The Agatha series is a similar classification except mixed mineralogy. Agatha soils are 40 to 60 inches to a lithic contact. Nicmar soils are dry for 60 to 75 consecutive days and are very deep to bedrock.
GEOGRAPHIC SETTING: Jummer soils are on mountain sides and have slopes of 45 to 65 percent. They formed in residuum and colluvium from Teanaway and Grande Ronde basalt, loess and minor amounts of volcanic ash. Elevation is 3,200 to 4,400 feet. These soils are in a climate with warm moderately dry summer and cool moist winters. Average annual precipitation is 35 to 50 inches. Average January temperature is about 24 degrees F. and average July temperature is about 64 degrees F. Average annual temperature is 43 to 45 degrees F. The growing season at 28 degrees F. is about 145 to 170 days and the frost-free season is about 65 to 100 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Jumpmore soils and the Cliffdell, Jumpe, Keechelus, Kiper Standup soils. Jumpmore soils are on mountain sides. Jumpe soils are on convex mountain sides, smooth mountain summits and ridges, are dry for 60 to 75 consecutive days and have base saturation of 60 to 90 percent in the Bw horizon. Keechelus soils are on mountain sides and benches, have clayey-skeletal argillic horizons and are very deep. Kiper soils are on mountain sides, are coarse-loamy with 5 to 20 percent hard sandstone fragments in the control section and are very deep. Standup soils are on mountain sides, have formed in colluvium and residuum from rhyolite, have sandy loam textures with 10 to 15 percent clay in the control section, chroma of 2 or 3 in the B and C horizons and are very deep.
DRAINAGE AND PERMEABILITY: Well drained, rapid runoff; moderate permeability.
USE AND VEGETATION: Timber production, livestock grazing, wildlife, recreation and watershed. The native vegetation is Douglas-fir, grand fir and ponderosa pine. Understory species include elksedge, pinegrass, common snowberry, princes pine and pinemat manzanita.
DISTRIBUTION AND EXTENT: East slopes of the Cascade Mountains in central Kittitas County, Washington; MLRA 3. This series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES PROPOSED: Kittitas County, Washington, 1998. The name is coined.
REMARKS: Diagnostic horizons and features recognized in this pedon include:
Ochric epipedon - 1 to 4 inches (A horizon)
Cambic horizon - 4 to 21 inches (Bw horizon)
Argillic horizon - 21 to 34 inches (2Bt horizon)
Vitrandic feature - 0 to 21 inches (A and Bw horizons)
All depths to diagnostic horizons and features are measured from the top of the first mineral layer.