LOCATION MANEZE                  CA

Established Series
REV: JHP/JPS/ET/KP/JH
10/2016

MANEZE SERIES

The Maneze series consists of very deep, well drained soils formed in colluvium and residuum derived from sandstone, mudstone, and siltstone. Maneze soils are on mountains and have slopes of 15 to 50 percent. The mean annual precipitation is about 2410 (95 inches) millimeters and the mean annual temperature is about 13 degrees C (55 degrees F).

TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, mesic Typic Humixerepts

TYPICAL PEDON: Maneze loam - on a convex, northwest-facing slope of 30 percent under Oregon white oak, annual and perennial grasses, and forbs at 747 meters (2450 feet) in elevation. (Colors are for moist soil unless otherwise stated. When described on July 5, 1983, the soil was moist throughout. When revisited on August 11, 1986, the soil was dry to a depth of 50 centimeters (20 inches) and moist below.)

Oi-- 0 to 1 centimeter (0 to 1 inch); slightly decomposed oak leaves and twigs; moderately acid (pH 6.0). (0 to 4 centimeters thick)

A1--1 to 29 centimeters (1 to 11 inches); very dark brown (10YR 2/2) loam, dark gray (10YR 4/1) dry; weak medium subangular blocky structure, parting to weak fine granular; soft, very friable, slightly sticky and slightly plastic; many very fine, common fine, medium and coarse roots throughout; many very fine and fine irregular and many very fine tubular pores; 8 percent gravel; strongly acid (pH 5.5); gradual smooth boundary.

A2--29 to 46 centimeters (11 to 18 inches); dark brown (10YR 3/3) extremely cobbly loam, grayish brown (10YR 5/2) dry; weak medium and coarse subangular blocky structure; soft, very friable, slightly sticky and slightly plastic; common very fine and fine, and few medium roots throughout; many very fine tubular, and common very fine interstitial pores; 20 percent gravel and 60 percent cobbles; strongly acid (pH 5.5); abrupt wavy boundary. (Combined thickness of the A horizons is 28 to 50 centimeters)

Bw--46 to 73 centimeters (18 to 29 inches); olive brown (2.5Y 4/4) extremely cobbly clay loam, light yellowish brown (2.5Y 6/4) dry; weak coarse and very coarse subangular blocky structure; soft, very friable, slightly sticky and slightly plastic; few very fine, fine, medium and coarse roots throughout; common very fine tubular and interstitial pores; 20 percent gravel and 50 percent cobbles; strongly acid (pH 5.5); clear wavy boundary. (20 to 46 centimeters thick)

BC--73 to 113 centimeters (29 to 45 inches); light olive brown (2.5Y 5/4) extremely cobbly clay loam, light yellowish brown (2.5Y 6/4) dry; massive; slightly hard, friable, sticky and slightly plastic; common very fine and fine, few medium and coarse roots around fragments; common, fine and few medium tubular, and common very fine interstitial pores; 22 percent gravel and 50 percent cobbles; very strongly acid (pH 5.0); clear wavy boundary. (15 to 40 centimeters thick)

Cg--113 to 161 centimeters (45 to 63 inches); gray (N 6/) very gravelly silty clay loam, light gray (5Y 7/1) dry; massive; hard, firm, slightly sticky and moderately plastic; common very fine and fine, few medium and coarse roots around fragments; common very fine and fine, few medium and coarse tubular pores; many fine and medium prominent strong brown (7.5YR 5/8) masses of iron accumulations, strong brown (7.5YR 5/8) moist; 50 percent gravel; very strongly acid (pH 4.5). (0 to 48 centimeters thick)

TYPE LOCATION: Redwood National Park, Humboldt County, California; located southeast of the town of Orick; approximately 1500 meters northwest of gate between Lyons Ranch and Bald Hills road; southwest quarter, southeast quarter, section 24, T. 9 N., R. 2 E., WGS84 Decimal degrees 41.1499722 latitude and -123.8941583 longitude; HBLM; USGS Bald Hills Quadrangle, CA., UTM Zone 10 424970mE 4555792mN; NAD83.

RANGE IN CHARACTERISTICS:

Soil Moisture: The soil is usually moist in all parts in the soil moisture control section from about November 1 to July 15, and is dry in all parts from about July 15 to October 15 in most years. The soils have a xeric soil moisture regime. Depth to seasonal water table is 100 to 152 centimeters (40 to 60 inches).

Soil temperature: The mean annual soil temperature is 10 to 15 degrees C (50 to 59 degrees F). The difference between mean summer and mean winter temperature is 6 to 10 degrees C.

The umbric epipedon: 25 to 50 centimeters thick.

Depth to Redoximorphic features is 100 to greater than 200 centimeters.

Reaction: moderately acid or strongly acid. Base saturation is less than 60 percent throughout, and may be higher near the surface, reaches a minimum in the Bw and then increases with depth.

Particle-Size Control Section (weighted average):
Rock fragments: 18 to 45 percent gravel and 20 to 60 percent cobbles.
Clay content: 22 to 32 percent clay.

O horizon

Hue: 10YR.
Value: 2 through 6 dry and moist.
Chroma: 1 through 4 dry and moist.

Texture: slightly decomposed organic material.
Wood fragments: 0 to 35 percent.
Reaction: neutral to moderately acid.

A horizon

Hue: 10YR or 2.5Y.
Value: 4 or 5 dry, 2 or 3 moist.
Chroma: 1 through 3 dry, 1 through 3 moist.

Texture of fine earth: loam.
Rock fragments: 0 to 50 percent gravel and 0 to 60 percent cobbles.
Clay content: 22 to 26 percent clay.

Bw horizon

Hue: 10YR or 2.5Y.
Value: 5 through 7 dry, 3 through 5 moist.
Chroma: 2 through 4 dry, 2 through 4 moist.

Texture of fine earth: clay loam, silty clay loam or loam.
Rock fragments: 18 to 45 percent gravel and 20 to 60 percent cobbles.
Clay content: 27 to 32 percent clay.

Cg horizon, when present

Hue: 2.5Y, 5Y, or N.
Value: 4 through 7 dry, 4 or 6 moist.
Chroma: / through 2 dry, / through 2 moist.

Texture of fine earth: silty clay loam or clay loam.
Rock fragments: 35 to 60 percent gravel and 0 to 60 percent cobbles.
Clay content: 28 to 35 percent clay.

Redoximorphic features:

Hue: 7.5 YR, 10 YR, or 2.5 Y
Value: 4 through 6 dry, 4 or 5 moist.
Chroma: 2 through 8 dry, 6 or 8 moist.

Some pedons have a C horizon.

C horizon

Hue: 10YR or 2.5Y.
Value: 5 through 7 dry, 3 through 6 moist.
Chroma: 2 through 4 dry, 2 through 4 moist.

Texture of fine earth: silty clay loam or clay loam.
Rock fragments: 20 to 75 percent gravel and 0 to 50 percent cobbles.
Clay content: 22 to 30 percent clay.

COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: Maneze soils are on convex, upper mountain side slopes and spur ridges. Slopes are 15 to 50 percent. Elevations are 158 to 964 meters (515 to 3160 feet). The soils formed in colluvium and residuum derived from sandstone, and mudstone. The climate is humid with cool, foggy summers and cool, rainy winters. Mean annual precipitation is 2160 to 2550 millimeters (85 to 100 inches). Mean January temperature is about 7 degrees C; mean July temperature is about 15 degrees C; and the mean annual temperature is 10 to 15 degrees C (50 to 59 degrees F). Frost-free season is about 200 to 260 days.

GEOGRAPHICALLY ASSOCIATED SOILS: Maneze soils are associated with the Coyoterock and Pasturerock soils. The Coyoterock soils are on upper slopes in moist locations below the Maneze soils. The Pasturerock soils are on uniform slopes alongside the Maneze soils.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained; very high runoff; low saturated hydraulic conductivity.

USE AND VEGETATION: This soil has been used for livestock grazing, wildlife habitat, and watershed. The native vegetation is oak woodland. Species include Oregon white oak, poison oak, annual and perennial grasses and forbs, with scattered big-leaf maple, Douglas-fir and California bay. Some areas have abundant pacific swordfern. Invasion by Douglas-fir and succession to forest is in progress in many areas.

DISTRIBUTION AND EXTENT: California Coastal Redwood Belt; MLRA 4B. The series is not extensive.

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

SERIES ESTABLISHED: Redwood National Park portion, Humboldt and Del Norte Area Soil Survey, California, 2007. The source of the name is from the Maneze Prairie, located in Redwood National Park south of the town of Orick.

REMARKS: Diagnostic horizons and features recognized in this pedon are:

1. Umbric epipedon - the zone from 1 to 46 centimeters (A horizon).
2. Cambic horizon - the zone from 46 to 73 centimeters (Bw horizon).
3. Redoximorphic features - the zone from 113 to 161 centimeters (Cg horizon).
4. Dystroxerepts feature - base saturation less than 60 percent, by ammonium acetate, between 25 and 100 centimeters.
5. Aquic conditions - seasonal water table, reduced matrix and aquic conditions for more than 30 days in most years within the zone from 113 to 161 centimeters
6. Particle-size control section - the zone from 26 to 101 centimeters, averages 28 percent clay, by field estimate, and 43 percent rock fragments, by volume. CEC/clay ratio averages 0.60.

ADDITIONAL DATA: NASIS User Pedon ID: 83CA605REDW029
Soil sample 83-RNP-9 and 86-RNP-8 were collected from this pedon and analyzed chemically at the Oregon State University Soil Testing Laboratory (Lab numbers 71712-71714, 82918 and 82919). Bulk density and moisture retention were determined at Humboldt State University.

Soil classified using the 12th Edition of the Keys to Soil Taxonomy.

---

National Cooperative Soil Survey
U.S.A.