Location: Island of Oahu, Honolulu County, Hawaii. Lualualei Naval Radio Station, .1 km (.08 mile) west of entrance gate and southwest along reservation fence, 30 m (100 feet) north toward steel radio towers.

Date of sampling: 1962.

Description by: Elmer Hill. Collectors: Elmer Hill.

Classification: Typic Chromustert, very fine, montmorillonitic, isohyperthermic.

Vegetation: Kiawe (Prosopis chilensis), klu (Acacia farnesiana), lantana (Lantana camara) and fingergrass (Chloris spp.).

Climate: Average annual precipitation is 38 to 75 cm (15-30 inches). (15-30 inches). The mean annual temperature is 23.9C (71F), and the mean January temperature 21.7C (71F), and the mean July temperature 25.6C (78F).

Parent material: Fine-textured alluvium from basic igneous rocks. Topography: Nearly level coastal plain.

Elevation: 16 m (55 feet).

Drainage: Imperfectly drained; slow permeability; slow runoff. Soil moisture: Moist

Remarks: This soil was utilized for the production of irrigated sugarcane prior to 1943. Since that time the government has used the area as a military installation with a minor part used for truck crops and pasture. Textures are apparent field textures. Paired sample number S62Ha-7-2.

HORIZON DESCRIPTION

A11 0 to 3 cm (0-1 inch), very dark gray (10YR 3/1) clay, very dark grayish brown (10YR 3/2) dry; strong LSL No. fine and very fine granular structure; very hard, firm, very sticky, very plastic; many fine roots; few 17292 light-colored sand grains; vertical cracks up to 5 cm (2 1/2 inches) wide; strong effervescence with hydrogen peroxide; neutral (pH 7.1); abrupt, smooth boundary.

A12 3 to 25 cm (1-10 inches), very dark gray (10YR 3/1) clay, very dark grayish brown (10YR 3/2) dry; LSL No. moderate coarse prismatic structure breaking to moderate medium subangular blocky structure; very 17293 hard, firm, very sticky, very plastic; many fine roots; many fine tubular pores; some organic litter within the cracks; strong effervescence with hydrogen peroxide; neutral (pH 7.2); gradual smooth boundary.

AC 25 to 55 cm (10-22 inches), very dark grayish brown (10YR 3/2) clay, very dark grayish brown (10YR LSL No. 3/2) dry; moderate coarse prismatic structure breaking to moderate medium subangular blocky struct- 17294 ture; very hard, firm, very sticky, very plastic; many fine roots; many fine tubular pores; common slickensides; few black specks; few grains of coral sand; strong effervescence with hydrogen peroxide; neutral (pH 7.2); clear smooth boundary.

Cl 55 to 75 cm (22-30 inches), very dark grayish brown (10YR 3/2) dry; moderate medium and coarse LSL No. subangular blocky structure; many weakly grooved slickensides; hard, firm, very sticky, very plastic 17295 common fine and medium roots mainly matted between cleavage plains; few fine and very fine tubular pores; common black stains in pores and in dendritic pattern on ped faces; few light-colored sand grains; common shiny specks; strong effervescence with hydrogen peroxide; neutral (pH 6.8); gradual smooth boundary.

C2cs 75 to 123 cm (30-49 inches), very dark grayish brown (10YR 3/2) clay, very dark grayish brown LSL No. (10YR 3/2) dry; strong medium and coarse subangular blocky structure; many deeply grooved slicken- 17296 sides; hard, firm, very sticky, very plastic; few fine roots matted between ped faces; few fine tubular pores; many fine and medium gypsum crystals; common black stains in pores and on peds; common shiny specks; few light-colored sand grains; strong effervescence with hydrogen peroxide; medium acid (pH 5.6); abrupt smooth boundary.

C3cs 123 cm (49 inches), very dark grayish brown (10YR 3/2) clay, very dark grayish brown (10YR 3/2) LSL No. dry; strong coarse subangular blocky structure; many deeply grooved slickensides; extremely hard, 17297 very firm, very sticky, very plastic; few fine roots between peds; few fine tubular pores; common medium and coarse gypsum crystals; few shiny specks; strong effervescence with hydrogen peroxide; medium acid (pH 5.8).