LOCATION PENDARVIS FLEstablished Series
TAXONOMIC CLASS: Sandy, siliceous, hyperthermic, ortstein Oxyaquic Alorthods
TYPICAL PEDON: Pendarvis sand--on a 1 percent slope in woodland. (Colors are for moist soil.)
A--0 to 6 inches; very dark gray (10YR 3/1) sand; mixture of uncoated sand grains and organic matter; single grained; loose; many fine, medium, and coarse roots; strongly acid; clear smooth boundary. (1 to 6 inches thick)
E1--6 to 36 inches; gray (10YR 6/1) sand; single grained; loose; common fine and medium roots; slightly acid; gradual wavy boundary.
E2--36 to 48 inches; light gray (10YR 7/1) sand; single grained; loose; few fine roots; common medium distinct very dark gray (10YR 3/1) masses of organic matter accumulations; moderately acid; abrupt irregular boundary. (Combined thickness of the E horizon ranges from 24 to 49 inches.)
Bh1--48 to 62 inches; black (N 2/0) loamy sand; massive; firm; moderately cemented ortstein consists of 75 to 90 percent of the horizon; sand grains are thickly coated; extremely acid; gradual wavy boundary.
Bh2--62 to 76 inches; dark reddish brown (5YR 3/2) sand; single grained; loose; sand grains are thinly coated; common medium faint dark reddish brown (5YR 2/2) masses having more organic matter than the matrix; very strongly acid; gradual wavy boundary. (Combined thickness of the Bh horizon ranges from 4 to 34 inches.)
Bt--76 to 80 inches; dark yellowish brown (10YR 4/4) loamy sand; weak medium granular structure; very friable; many uncoated sand grains; very strongly acid.
TYPE LOCATION: St. Lucie County, Florida. Approximately 5.0 miles south of Ft. Pierce, about 0.8 mile east of U.S. Highway 1, and about 100 feet south of Midway Road; SW 1/4, NW 1/4, Sec. 2, T. 36 S., R. 40 E.
RANGE IN CHARACTERISTICS: Total thickness of the A and E horizons range from 30 to 50 inches. Reaction ranges from very strongly acid to slightly acid in the A and E horizons and from extremely acid to moderately acid in the Bh and C horizons.
The A horizon has hue of 10YR, value of 2 to 4, and chroma of 1; or it neutral with value of 2 to 4. Texture is sand or fine sand.
The E horizon has hue of 10YR, value of 5 to 8, and chroma of 1 or 2. Streaks and masses of organic matter accumulations range from none to common. Texture is sand or fine sand.
A Bw horizon is between the E and Bh horizon in some pedons. Where present, it has hue of 10YR, value 3 or 4, and chroma 1 or 2. Streaks and splotches of organic matter depletions range from few to many. Texture is sand or fine sand.
The Bh horizon has hue of 5YR to 10YR, value 2 or 3, and chroma of 4 or less; or it is neutral with value of 2. It is weakly or moderately cemented in 60 to 90 percent of the horizon. Some pedons have a lower Bh horizon that is noncemented and has the same range of colors and textures. Thickness of the Bh horizon is highly variable within short distances. Texture is fine sand, sand, loamy fine sand, or loamy sand.
The Bt horizon has hue of 7.5YR or 10YR, value of 3 to 6, and chroma of 2 to 4. Texture is loamy fine sand, or loamy sand.
The BC horizon has hue of 7.5YR or 10YR, value of 3 to 5, and chroma of 2 to 4. Texture is fine sand, sand, loamy fine sand, or loamy sand.
An and E&Bh or E'&Bh horizon is in some pedons. Where present, the E or E part of the horizon has the same range of color and textures as the E horizon, and the Bh part has the same range as the Bh horizon. Fragments of Bh material range from few to common.
The C horizon, where present, has hue of 10YR to 5Y, chroma of 5 to 7, and value of 3 or less. Texture is fine sand, sand, loamy fine sand, or loamy sand.
COMPETING SERIES: There are no other known series in the same family.
GEOGRAPHIC SETTING: Pendarvis soils are on low ridges and knolls in the flatwoods in central and southern Florida. Slopes range from 0 to 5 percent along drainage ways and depressions. They formed in thick sandy marine deposits. The climate is humid subtropical. The average annual precipitation ranges from 50 to 60 inches and is heaviest in the summer. The average annual temperature ranges from 70 to 74 degrees F.
GEOGRAPHICALLY ASSOCIATED SOILS: These include the Ankona, Basinger, EauGallie, Immokalee, Myakka, Oldsmar, Wabasso, and Wauchula series. All of these soils are very poorly or poorly drained, are on lower positions and, except for Ankona soils, lack ortstein. In addition, Ankona, EauGallie, Oldsmar, Wabasso, and Wauchula soils have argillic horizons beneath the spodic horizon. Basinger soils have weakly expressed spodic horizons.
DRAINAGE AND PERMEABILITY: Moderately well drained; slow to moderately slow permeability.
USE AND VEGETATION: Most areas are in native vegetation and are used for wildlife habitat. A few areas are used for citrus, improved pasture grasses, and community developments. The vegetation consists of scattered longleaf pine and sand pine with a dense understory of myrtle oak, chapman oak, sand live oak, sawpalmetto, and running oak. Pineland threeawn is the most common native grass.
DISTRIBUTION AND EXTENT: Peninsulas Florida. The series is of small known extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Auburn, Alabama.
SERIES ESTABLISHED: St. Lucie County, Florida; 1977.
REMARKS: Diagnostic horizons and features recognized in this pedon:
Ochric epipedon - the zone from 0 to 48 inches (A horizon).
Albic horizon - the zone from 6 to 48 inches (E1 and E2 horizons).
Spodic horizon - the zone from 48 to 76 inches (Bh1 and Bh2 horizons).
Ortstein feature - the zone from 48 to 62 inches (Bh1 horizon).
A water table is at depths of 24 to 40 inches for 1 to 4 months during normal wet seasons and 40 to 60 inches for the remainder of the year except in dry periods. The water is perched above the spodic horizon early in the summer rainy season and after heavy rainfall in other seasons.
Pendarvis soils were formerly included in the Pomello series. Saturated hydraulic conductivity of the spodic horizon from nine pedons ranges from 0.68 to 0.00 in. /hr.