LOCATION PADLOCK FL
Established Series
RLW
10/2018
PADLOCK SERIES
The Padlock series consists of very deep, moderately well drained, slowly permeable soils on uplands of the North Central Florida Ridge. They formed in thick clayey marine deposits in upper central Florida. Near the type location, the mean annual temperature is about 68 degrees F, and the mean annual precipitation is about 57 inches. Slopes range from 0 to 8 percent.
TAXONOMIC CLASS: Fine, mixed, active, thermic Aquic Paleudults
TYPICAL PEDON: Padlock fine sand--pasture. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 5 inches; very dark grayish brown (10YR 3/2) fine sand; weak medium granular structure; very friable; nonsticky, nonplastic; common fine roots; strongly acid; clear smooth boundary. (3 to 10 inches thick)
Bt1--5 to 13 inches; yellowish red (5YR 5/8) sandy clay; moderate fine subangular blocky structure; friable; slightly sticky, slightly plastic; common fine roots; common faint clay films on ped faces; very strongly acid; clear wavy boundary.
Bt2--13 to 17 inches; strong brown (7.5YR 4/6) sandy clay; moderate medium subangular blocky structure; firm; moderately sticky, moderately plastic; common fine roots; common distinct clay films on ped faces; few fine prominent dark yellowish brown (10YR 4/6) and few fine distinct yellowish brown (10YR 5/6) masses of iron accumulation; very strongly acid; gradual wavy boundary.
Bt3--17 to 22 inches; dark yellowish brown (10YR 4/6) sandy clay; moderate coarse subangular blocky structure; firm; very sticky, very plastic; few fine roots; sand grains coated and bridged with clay; common distinct clay films on faces of peds; many prominent yellowish brown (10YR 5/6) masses of iron accumulation and many prominent pale brown (10YR 6/3) areas of iron depletions; very strongly acid; gradual wavy boundary. (Combined thickness of the Bt horizons range from 17 to 25 inches)
Btg1--22 to 51 inches; light brownish gray (10YR 6/2) sandy clay; moderate coarse subangular blocky structure; firm; very sticky, very plastic; few fine roots; common faint clay films on faces of peds; many medium prominent dark brown (10YR 3/3) and few fine distinct strong brown (7.5YR 5/6) masses of iron accumulation; few faint light gray (10YR 7/2) areas of iron depletions; very strongly acid; gradual wavy boundary.
Btg2--51 to 63 inches; light brownish gray (10YR 6/2) sandy clay; weak coarse subangular blocky structure; firm; very sticky, very plastic; common faint clay films on ped faces; common medium prominent strong brown (7.5YR 5/6) and dark brown (10YR 3/3) masses of iron accumulation; very strongly acid; gradual wavy boundary.
Btg3--63 to 80 inches; light gray (10YR 7/1) sandy clay; weak coarse subangular blocky structure; firm; very sticky, very plastic; common faint clay films on ped faces; many medium prominent strong brown (7.5YR 5/6) and few medium prominent dark brown (7.5YR 3/3) masses of iron accumulation; very strongly acid.
TYPE LOCATION: Suwannee County, Florida; Live Oak East topographic quadrangle. Latitude 30 degrees, 13 minutes, 31 seconds N.; Longitude 82 degrees, 56 minutes, 23 seconds W. NAD83.
RANGE IN CHARACTERISTICS: Solum thickness is more than 60 inches. Reaction is very strongly acid to moderately acid throughout except where the surface has been limed.
The A or Ap horizon has hue of 10YR or 2.5Y, value of 2 to 4, and chroma of 1 to 4. Where the value is 3 or less, it is less than 7 inches in thickness. Texture is sand, fine sand, loamy sand, or loamy fine sand.
The E horizon, where present, has hue of 10YR or 2.5Y, value of 5 to 7, and chroma of 2 to 6. Texture is sand, fine sand, loamy sand, or loamy fine sand.
The upper part of the Bt horizon has hue of 5YR or 7.5YR, value of 4 to 7, and chroma of 3 to 8. Redoximorphic features in shades of red, yellow, and brown range from none to common. Texture is sandy clay or clay.
The lower part of the Bt horizon has hue of 7.5YR or 10YR, value of 4 to 7, and chroma of 3 to 8. Redoximorphic features in shades of red, yellow, and brown, and below 20 inches, gray, range from few to many. Texture is sandy clay or clay.
The Btg horizon has hue of 10YR or 2.5Y, value of 4 to 7, and chroma of 1 or 2. Masses of iron accumulations in shades of red, yellow, or brown range from few to many. Texture is sandy clay or clay.
The BCg horizon, where present, has the same range of colors as the Btg horizon. Texture is sandy clay or clay.
The Cg horizon, where present, has hue of 10YR to 5Y, value of 5 to 7, and chroma of 1 to 2. Masses of iron accumulation in shades of red, yellow, or brown range from few to many. Texture is sandy clay loam, sandy clay, or clay.
COMPETING SERIES: There are no known series in the same family.
GEOGRAPHIC SETTING: Padlock soils are on uplands of the North Central Florida Ridge. Slopes range from 0 to 8 percent. They formed thick clayey marine sediments. The climate is humid subtropical. The average annual temperature ranges from 66 to 70 degrees F, and the average annual precipitation ranges from 55 to 60 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These include
Alpin,
Blanton,
Bonneau,
Chiefland,
Falmouth,
Lynchburg,
Otela, and
Troup series. The excessively drained Alpin soils are on higher positions, are sandy throughout, and have lamellae. The somewhat excessively drained to moderately well drained Blanton soils are on similar to higher positions and have sandy surface and subsurface layers 40 to 80 inches in thickness. The well drained Bonneau soils are on slightly higher positions and have sandy surface and subsurface layers 20 to 40 inches in thickness. Chiefland soils are on similar positions, are moderately deep to limestone bedrock, and have sandy surface and subsurface layers 20 to 40 inches in thickness. The somewhat poorly drained Falmouth soils are on similar positions and have smectitic mineralogy. The somewhat poorly drained Lynchburg soils are on lower positions and have fine-loamy subsoils. Otela soils are on similar positions and have sandy surface and subsurface layers 20 to 40 inches in thickness. The somewhat excessively drained Troup soils are on higher positions and have sandy surface and subsurface layers 40 to 80 inches in thickness.
DRAINAGE AND PERMEABILITY: Moderately well drained; slow permeability.
USE AND VEGETATION: Most areas of Padlock soils are used for woodland and pasture. Some areas are used for cropland. Native vegetation consists of slash pine, longleaf pine, mockernut hickory, laurel oak, water oak, sweetgum, black cherry, tree sparkleberry, muscadine grape, and blackberry.
DISTRIBUTION AND EXTENT: North Central Florida Ridge Florida. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Auburn, Alabama.
SERIES ESTABLISHED: Suwannee County, Florida, 2003.
REMARKS: This soil was formally mapped Susquehanna series in the initial soil survey of Suwannee County, FL, published in 1965.
Diagnostic horizons and features recognized in this pedon:
Ochric epipedon - the zone from 0 to 5 inches (Ap horizon).
Argillic horizon - the zone from 5 to 80 inches (Bt1, Bt2, Bt3, Btg1, Btg2, and Btg3 horizons).
Aquic feature - Redoximorphic depletions with value of 4 or more and chroma of 2 or less at a depth of 22 inches (Bt2 horizon)
ADDITIONAL DATA: Characterization pedon - Suwannee County, Florida; S02FL-121-004. Sample by NSSL, Lincoln, NE. 05/02.
National Cooperative Soil Survey
U.S.A.