LOCATION FT. GREEN FLEstablished Series
TAXONOMIC CLASS: Loamy, siliceous, semiactive, hyperthermic Arenic Endoaqualfs
TYPICAL PEDON: Ft. Green fine sand--pasture. (Colors are for moist soil.)
Ap--0 to 6 inches; very dark gray (10YR 3/1) fine sand; weak fine crumb structure; very friable; many fine and medium roots; strongly acid; clear smooth boundary. (3 to 7 inches thick.)
E1--6 to 17 inches; grayish brown (10YR 5/2) fine sand; single grained; loose; many fine and medium roots; many clean sand grains; slightly acid; gradual wavy boundary.
E2--17 to 31 inches; light brownish gray (10YR 6/2) fine sand; single grained; loose; common fine and medium roots; 10 to 15 percent cobbles; slightly acid; abrupt wavy boundary. (Combined thickness of the E horizon is 14 to 37 inches.)
Btg1--31 to 42 inches; light gray (10YR 7/1) cobbly sandy clay loam; weak medium granular structure; friable; slightly acid; abrupt wavy boundary.
Btg2--42 to 52 inches; light gray (10YR 7/1) sandy clay loam; weak coarse subangular blocky structure; friable; slightly acid; abrupt wavy boundary. (Combined thickness of the Btg1 and Btg2 horizon is 15 to 30 inches.)
Btg3--52 to 80 inches; light gray (5Y 7/1) fine sandy loam; weak coarse subangular blocky structure; firm; slightly acid.
TYPE LOCATION: Hardee County, Florida, W. Albert Carlton Ranch; 4 miles west of Wauchula, 1/2 mile east of Florida State Highway 64A. SE1/4SE1/4, sec. 24, T. 34 S., R. 24 E.
RANGE IN CHARACTERISTICS: Solum thickness ranges from 60 to more than 80 inches. Mean annual soil temperature 20 inches below the surface ranges from 72 degrees to 75 degrees F. Soil reaction ranges from extremely acid to neutral in the A and E horizons and from very strongly acid to mildly alkaline in the B and C horizons. Cobbles range from 0 to 20 percent in the lower E2 horizon and 15 to 30 percent in the upper Btg horizon. Bouldery phases are recognized.
The A horizon has hue of 10YR or 2.5Y, value of 2 to 5, and chroma of 2 or less or is neutral. Texture is fine sand or sand.
The E horizon has hue of 10YR or 2.5Y, value of 4 to 7, and chroma of 3 or less or is neutral. Mottles of yellow or brown range from none to common. Texture of the E horizon is dominantly fine sand or sand, but ranges to cobbly fine sand in the lower part. A thin Bw horizon occurs in some pedons. It has hue of 10YR, value 4 to 6, and chroma of 2 or 3.
The Btg horizon has hue of 10YR to 5GY, value of 4 to 7, and chroma of 2 or less, or is neutral. Some pedons have mottles of brown, yellow, or gray. Texture is cobbly fine sandy loam, cobbly sandy clay loam, cobbly sandy clay, fine sandy loam, sandy clay loam, or sandy clay. Clay content averages 18 to 35 percent in the upper 20 inches of the argillic horizon.
Where present, a C horizon has the same colors and textures as the B horizon. Carbonatic nodules and limestone boulders are none to common.
COMPETING SERIES: These are the Boca, Felda, Isles, Pinellas, and Roemer series. None of these have cobbly subsoils. In addition, Boca soils are underlain with limestone within 40 inches of the surface. Felda soils have a thinner solum. Pinellas soils have Bk horizons, and Roemer soils are somewhat poorly drained.
GEOGRAPHIC SETTING: Ft. Green soils are on side slopes adjacent to flood plains or depressional areas and on low ridges and knolls. Slopes are 0 to 5 percent. The soils formed in unconsolidated marine sands and clays. At the type location, average annual precipitation is 48 inches, and the average annual temperature is about 73 degrees F.
GEOGRAPHICALLY ASSOCIATED SOILS: This is Felda from the competing series and, in addition, Bradenton, EauGallie, Holopaw, Immokalee, Myakka, Pompano, and Wabasso series. Bradenton soils have an A horizon less than 20 inches thick. EauGallie, Immokalee, Myakka and Wabasso soils have spodic horizons. Holopaw soils have an A horizon more than 40 inches thick. Pompano soils are sandy throughout and lack an argillic horizon.
DRAINAGE AND PERMEABILITY: Poorly drained. Moderately rapid runoff. Slow to moderately slow permeability. A water table is at 6 to 18 inches of the surface for 1 to 4 months most years.
USE AND VEGETATION: A large part of Ft. Green soils has been cleared, and most is used for tame pastures. Natural vegetation is waxmyrtle, slash pine, cabbage palm, pineland threeawn and many other grasses, vines, and shrubs.
DISTRIBUTION AND EXTENT: Peninsular Florida. The series is not extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Auburn, Alabama
SERIES ESTABLISHED: Hardee County, Florida; 1981.
REMARKS: Ft. Green soils were formerly mapped as a variant of the Felda series.
Diagnostic horizons and features in this pedon:
Ochric epipedon and arenic feature--0 to 31 inches (Ap, E1, E2)
Albic horizon--6 to 31 inches (E1, E2 horizons).
Argillic horizon--31 to more than 80 inches (Btg1, Btg2, Btg3).