LOCATION DOLEKEI FM+PBEstablished Series
TAXONOMIC CLASS: Fine, mixed, active, isohyperthermic Typic Dystrudepts
TYPICAL PEDON: Dolekei silty clay loam - on a 40 percent convex-complex slope in agricultural forest. When described (3/28/79) the soil was moist throughout. (Colors are for moist soil. All textures are apparent field textures.)
A1--0 to 8 centimeters; dark brown (7.5YR 3/2) silty clay loam; moderate very fine and fine subangular blocky structure; very friable, slightly sticky and slightly plastic; many very fine, fine, medium, and coarse roots; common very fine tubular and interstitial pores; about 5 percent pebbles and 5 percent small hard basalt cobbles; strongly acid (pH 5.3 in 1:1 water); abrupt smooth boundary. (8 to 28 centimeters thick)
B2--8 to 36 centimeters; dark yellowish brown (10YR 4/4) silty clay loam; moderate medium subangular blocky structure; friable, slightly sticky and plastic; few very fine, fine, and medium roots; common very fine and fine tubular pores; about 5 percent pebbles and 5 percent hard basalt cobbles; strongly acid (pH 5.4 in 1:1 water); gradual wavy boundary. (23 to 40 centimeters thick)
C1--36 to 74 centimeters; yellowish brown (10YR 5/4) silty clay loam with a dark grayish brown (2.5Y 4/2) lithochromic saprolitic intrusion 20 centimeters thick at about a 60 degree tilt; massive; friable, slightly sticky and slightly plastic; common fine and medium roots; many very fine tubular pores; strongly acid (pH 5.4 in 1:1 water); gradual irregular boundary. (19 to 38 centimeters thick)
C2r--74 to 104 centimeters; yellowish brown (10YR 5/4) highly weathered saprolitic basis igneous rock that crushes to silt loam; many manganese and iron stains in fractures that are 3 to 7 centimeters apart and less than 1 millimeter wide; strongly acid (pH 5.4 in 1:1 water).
TYPE LOCATION: Island of Ponape, Federated States of Micronesia; about 800 meters east of Dahu Sokele bridge, then 215 meters south; lat. 6 degrees 57'4.1" N. and long. 158 degrees 15'6.4" E.
RANGE IN CHARACTERISTICS: The depth to a paralithic contact ranges from 50 to 100 centimeters. The soil in 1:1 water ranges from very strongly acid to medium acid.
The A horizon has moist color of 10YR 3/3, 3/4, 4/3, or 4/6 or of 7.5YR 3/2 or 3/4. It is silty clay loam or clay loam. There are 0 to 5 percent pebbles and 0 to 20 percent cobbles on the surface and in the horizon.
The B horizon has color of 10YR 4/4, 4/6, 5/6, or 5/8. It is heavy clay loam, silty clay, or clay. Coarse fragments range from 5 to 20 percent cobbles and 5 to 15 percent pebbles.
The C horizon is silt loam, loam, or silty clay loam.
COMPETING SERIES: These are the Dolen, Ollei, and Tolonier series. Dolen soils are very-fine. Ollei soils are skeletal and shallow to a lithic contact. Tolonier soils are skeletal.
GEOGRAPHIC SETTING: The Dolekei soils are on uplands and have slopes of 15 to 100 percent. These soils formed in residuum and colluvium from highly weathered basic igneous rock. Elevation is 15 to 400 meters. The mean annual rainfall is about 581 centimeters, which occurs throughout the year. The mean annual temperature is 25 degrees to 27 degrees C.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Fomseng and the Umpump soils. Fomseng soils are high in organic matter and are 25 to 50 centimeters to a paralithic contact. Umpump soils are moderately well drained and have an oxic horizon.
DRAINAGE AND PERMEABILITY: Well drained; medium or rapid runoff; moderately rapid permeability.
USE AND VEGETATION: Dolekei soils are used for subsistence agriculture and woodland. The native vegetation is mainly mixed upland tropical rain forest. The main subsistence crops- are banana, breadfruit, coconut, kava, and dryland taro.
DISTRIBUTION AND EXTENT: Upland areas of the island of Ponape, East Caroline Islands. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: Ponape, Federated States of Micronesia, 1981.
ADDITIONAL DATA: This pedon was sampled and laboratory analysis was done by the SCS National Soil Survey Laboratory, Lincoln, Nebraska, in 1979. Pedon number is S79 TQ-634-27.
OSED scanned by SSQA. Last revised by state on 2/81.