LOCATION KOLEKOLE HIEstablished Series
TAXONOMIC CLASS: Fine, kaolinitic, isohyperthermic Oxic Dystrustepts
TYPICAL PEDON: Kolekole silty clay loam - pineapple. (Colors are for moist soil unless otherwise noted. Textures are "apparent field textures.")
Ap1--0 to 4 inches; dark reddish brown (5YR 3/3) silty clay loam, reddish brown (5YR 4/4) dry; weak fine and very fine granular structure; slightly hard, very friable, slightly sticky and slightly plastic; many fine roots; many very fine interstitial pores; common very fine shiny specks; common earthy lumps that are difficult to rupture by rubbing; slight effervescence with hydrogen peroxide; extremely acid (pH 4.4); clear smooth boundary. (3 to 6 inches thick)
Ap2--4 to 12 inches; same color and texture as above; weak fine and medium subangular and weak very fine granular structure; slightly hard, very friable, slightly sticky and slightly plastic; many fine roots; common very fine tubular and interstitial pores; many very fine earthy lumps that are difficult to rupture by rubbing; about 10 percent of dark reddish brown (2.5YR 3/4) material from below; common very fine shiny specks; extremely acid (pH 4.4); clear wavy boundary. (7 to 10 inches thick)
B21--12 to 20 inches; dark reddish brown (2.5YR 3/4) silty clay loam, dark red (2.5YR 3/6) dry; moderate very fine and fine subangular and angular blocky structure; very hard, friable, sticky and plastic; common fine roots; common fine and very fine tubular pores; few fine earthy lumps; few shiny specks; medium acid (pH 5.6); gradual smooth boundary. (6 to 8 inches thick)
B22--20 to 25 inches; dark reddish brown (2.5YR 3/4) silty clay loam, dark red (2.5YR 3/6) dry; moderate very fine and fine subangular and angular blocky structure; hard, firm, sticky and plastic; few fine roots; common very fine and fine tubular pores; patchy pressure faces on peds; few very fine earthy lumps; few very fine shiny specks; strongly acid (pH 5.3); gradual smooth boundary. (2 to 7 inches thick)
B23--25 to 32 inches; same color and texture as above; moderate very fine and fine subangular blocky structure; hard, firm, sticky and plastic; few fine roots; common fine tubular pores; weak continuous pressure faces on peds; few earthy lumps; few shiny specks; very strongly acid (pH 5.0); clear smooth boundary. (6 to 8 inches thick)
B24--32 to 38 inches; dark reddish brown (2.5YR 3/4) silty clay, red (2.5YR 5/8) dry; weak fine and very fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; few fine roots; common very fine, fine and medium pores; few thin patchy clay films; few very fine earthy lumps; few shiny specks; very strongly acid (pH 4.8); abrupt wavy boundary. (2 to 7 inches thick)
B25bt--38 to 60 inches; dark reddish brown (5YR 3/3) silty clay loam, dark reddish brown (5YR 3/4) moist; strong very fine and fine subangular and angular blocky structure; very hard, friable, sticky and plastic; compact in place; capped by a massive, banded, brittle pan 1/16 to 3/8 inch thick that has a smooth surface; few very fine tubular pores; dark red (10R 3/6) and red (10R 4/6) continuous clay films on about 50 percent of faces of peds; continuous strong pressure faces on all peds; many weathered stones and boulders that retain original rock structure; common light colored sand grains; very strongly acid (pH 4.7).
TYPE LOCATION: Honolulu County, Hawaii; at the junction of Kunia Road and Farrington Highway 5.2 miles north on Kunia Road or 0.6 mile south of Kunia Camp, 50 feet west of the highway.
RANGE IN CHARACTERISTICS: The panlike layer at the top of the Bbt horizon is at depths ranging from 15 to 50 inches, but is normally at a depth of about 25 inches. Mean annual soil temperature is 71 degrees F.
The A horizon has value and chroma of 2 or 3 moist and 3 or 4 dry.
The B horizon above the Bbt horizon has value of 2 or 3 and chroma of 4 through 6 when moist; when dry value is 3 through 5 and chroma is 4 through 8. The Bbt horizon is silty clay loam or silty clay. A black 1/4- to 1/2-inch thick layer of decomposed roots is commonly on top of the panlike layer. The amount of highly weathered rock fragments in the Bbt horizon varies within short distances, but it normally is between 30 and 40 percent by volume. The reaction of the B horizon ranges from medium acid to extremely acid.
COMPETING SERIES: These are the Haliimaile, Kunia, Kohala, Pohakupu series. Haliimaile and Kunia soils have kaolinitic mineralogy and Haliimaile soils have temperatures less than 72 degrees F. Pohakupu soils do not have a panlike layer in the B horizon.
GEOGRAPHIC SETTING: Kolekole soils are on uplands and have slopes of 1 to 25 percent. Elevation ranges from 500 to 1,200 feet. The soils formed in old gravelly alluvium mixed with volcanic ash. Annual rainfall is 35 to 50 inches. Mean annual temperature is about 71 degrees F., average January temperature is 69 degrees F., and average July temperature is 76 degrees F.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Kunia, Mahana and Wahiawa soils. Mahana soils have ashy mineralogy in the control section, and they are very strongly acid throughout the B horizon. Wahiawa soils have patchy clay films in the lower part of the B2 horizon.
DRAINAGE AND PERMEABILITY: Well drained; medium runoff; moderately rapid permeability above the Bbt horizon and moderate below.
USE AND VEGETATION: Irrigated sugarcane and pineapple.
DISTRIBUTION AND EXTENT: Medial windward slopes of the Waianae Range on the island of Oahu. This series is about 3,200 acres in extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: Honolulu County, Hawaii. Soil Survey of the Territory of Hawaii, 1949.
OSED scanned by SSQA. Last revised by state on 5/78.