LOCATION OLI                     HI

Established Series
Rev. RCH/HHS/MRK
03/2017

OLI SERIES

The Oli series consists of moderately deep, well drained soils that formed from volcanic ash over residuum from andesite. Oli soils are on ash fields and have slopes of 3 to 70 percent. Mean annual rainfall is about 889 mm (35 inches) and mean annual temperature is about 21 degrees C. (70 degrees F.)

TAXONOMIC CLASS: Medial, amorphic, isothermic Dystric Haplustands

TYPICAL PEDON: Oli silt loam - pasture. (Colors are for moist soil unless otherwise noted. All textures are "apparent field textures.")

A1--0 to 13 centimeters (0 to 5 inches); dark brown (7.5YR 3/2) medial silt loam, brown (7.5YR 5/3) dry; weak and moderate very fine and fine granular structure; slightly hard, very friable, nonsticky and nonplastic; many fine roots; many very fine and fine interstitial pores; strongly acid (pH 5.4); clear smooth boundary. (8 to 23 centimeters {3 to 9 inches} thick)

A2--13 to 33 centimeters (5 to 13 inches); dark brown (7.5YR 3/2) medial loam, yellowish brown (10YR 5/4) dry; weak fine and very fine subangular blocky structure; soft, very friable, nonsticky and slightly plastic; many fine roots; many very fine and fine interstitial pores; few pebbles; strongly acid (pH 5.4); abrupt smooth boundary. (18 to 23 centimeters {7 to 9 inches} thick)

Bw1--33 to 46 centimeters (13 to 18 inches); dark brown (7.5YR 3/2) medial silt loam, brown (10YR 5/3) dry; weak coarse prismatic structure parting to weak fine and medium subangular blocky; soft, very friable, nonsticky and slightly plastic; many very fine roots; many very fine and fine tubular pores; few andesite pebbles; strongly acid (pH 5.2); abrupt smooth boundary. (13 to 15 centimeters {5 to 6 inches} thick)

Bw2--46 to 53 centimeters (18 to 21 inches); dark brown (10YR 3/3) medial silt loam, brown (10YR 5/3) dry; weak medium subangular blocky structure; soft, friable, slightly sticky and slightly plastic; many very fine roots; many fine and very fine tubular pores; faces of peds have appearance when dry of being coated with a gray material which disappears on wetting; very strongly acid (pH 5.0); abrupt smooth boundary. (7 to 13 centimeters {3 to 5 inches} thick)

2Bw--53 to 76 centimeters (21 to 30 inches); dark brown (7.5YR 3/2) silty clay loam, brown (7.5YR 5/2) dry; strong fine and very fine subangular blocky structure; soft, very friable, slightly sticky and slightly plastic; few very fine roots are concentrated between peds; few very fine and fine tubular pores; many hard earthy lumps; very strongly acid (pH 4.7); abrupt wavy boundary. (15 to 28 centimeters {6 to 11 inches} thick)

3R--76 to 91 centimeters (30 to 36 inches); hard, slightly weathered andesite.

TYPE LOCATION: Island of Molokai, Maui County, Hawaii, about 1 mile northeast of Puu Luahine and 2 miles east-southeast of Kualapuu village; along the road approximately 274 meters southwest of the water tank; 21 degrees 08' 37" north latitude and 157 degrees 00' 19" west longitude (Old Hawaiian datum).

RANGE IN CHARACTERISTICS:
The depth to bedrock ranges from 50 to 102 centimeters (20 to 40 inches.)In some pedons, the depth to bedrock may be less 50 centimeters.

The A horizon is dominantly silt loam or loam, and includes silty clay loam.
Hue usually of 7.5YR or 10YR
Value of 4 or 5 dry
Chroma of 2 through 4 dry

The upper part of the B horizon is loam or silt loam.
Hue usually of 5YR, 7.5YR or 10YR
Value of 4 or 5 dry
Chroma of 2 through 4 dry

COMPETING SERIES: These are the Paaiki and Pane soil series. Paaiki soils have a B horizon with silty clay loam texture in the upper part and silty clay in the lower part. Pane soils have a weakly smeary A horizon and are slightly acid or neutral throughout the solum.

GEOGRAPHIC SETTING: Oli soils are on ash fields at elevations between 305 to 686 meters (1,000 and 2,250 feet) on shield volcanoes. Slope is 3 to 70 percent. The soils formed in volcanic ash over residuum from andesite. Annual rainfall is 76 to 102 centimeters (30 to 40 inches). The average January temperature is about 20 degrees C. (68 degrees F.); average July temperature is about 22 degrees C. (72 degrees F.) Mean annual temperature is about 21 degrees C. (70 degrees F.)

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Mahana and Naiwa soils. Mahana and Naiwa soils have hue of 2.5YR or redder throughout the profile.

DRAINAGE AND PERMEABILITY: Well drained; medium runoff; moderately rapid permeability.

USE AND VEGETATION: Used for pasture and wildlife. Present vegetation is guava (Psidium guajava), uhaloa (Waltheria indica), Natal redtop (Tricholaena repens), bermudagrass (Cynodon dactylon), lantana (Lantana camara) and indigo (Indigofera suffruticosa).

DISTRIBUTION AND EXTENT: Islands of Molokai and Kauai, Hawaii. This soil is inextensive, with approximately 5,000 acres.

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Davis, California

SERIES ESTABLISHED: Island of Molokai, Maui County, Hawaii, 1971.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Umbric epipdeon- 0 to 33 centimeters
Andic soil properties- 0 to 53 centimeters
Lithic contact- at 76 centimeters
Isothermic soil temperature regime
Ustic soil moisture regime
Edit log: 1/15 Horizon designations updated and minor edits. MRK.
1/01 Classification changed from Medial, isothermic, Oxic Dystrandepts SN
OSED scanned by SSQA. Last revised by state on 2/01.

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National Cooperative Soil Survey
U.S.A.