LOCATION POMONA FL
Established Series
Rev. BPT-CAP-AMS
11/2017
POMONA SERIES
The Pomona series consists of very deep, poorly and very poorly drained soils that formed in sandy and loamy marine sediments. Pomona soils are on flats and flatwoods on marine terraces. Slopes range from 0 to 2 percent. The mean annual temperature is about 23 degrees C (72 degrees F), and the mean annual precipitation is about 1397 millimeters (55 inches).
TAXONOMIC CLASS: Sandy, siliceous, hyperthermic Ultic Alaquods
TYPICAL PEDON: Pomona sand, in a forest at elevation of about 22 meters (73 feet) above mean sea level. (Colors are for moist soil.)
A--0 to 13 centimeters (0 to 5 inches); very dark gray (10YR 3/1) sand; weak fine granular structure; very friable; common fine roots; very strongly acid; clear wavy boundary. [8 to 20 centimeters (3 to 8 inches) thick]
E1--13 to 30 centimeters (5 to 12 inches); gray (10YR 6/1) sand; single grain; loose; common fine roots; uncoated sand grains; common medium faint dark gray (10YR 4/1) areas of organic matter accumulations; very strongly acid; clear wavy boundary.
E2--30 to 66 centimeters (12 to 26 inches); light gray (10YR 7/1) sand; single grain; loose; common fine roots; uncoated sand grains; few fine and medium faint light brownish gray (10YR 6/2) iron depletions; very strongly acid; abrupt wavy boundary. [Combined thickness of the E horizons range from 15 to 69 centimeters (6 to 27 inches) thick]
Bh1--66 to 74 centimeters (26 to 29 inches); 50 percent very dark gray (5YR 3/1) and 50 percent dark reddish brown (5YR 3/3) sand; moderate medium granular structure; friable; few fine roots; sand grains are coated with organic matter; very strongly acid; clear wavy boundary.
Bh2--74 to 91 centimeters (29 to 36 inches); very dark gray (5YR 3/1) sand; moderate medium granular structure; friable; few fine roots; sand grains coated with organic matter; few fine faint dark reddish brown (5YR 3/3) areas of organic matter; very strongly acid; clear wavy boundary. [Combined thickness of the Bh horizons range from 10 to 56 centimeters (4 to 22 inches) thick]
BE--91 to 99 centimeters (36 to 39 inches); 50 percent dark brown (7.5YR 3/2) and 50 percent dark grayish brown (10YR 4/2) sand; weak medium crumb structure; very friable; few fine roots; few fine distinct dark reddish brown (5YR 3/2) organic matter accumulations; very strongly acid; clear wavy boundary. [8 to 30 centimeters (3 to 12 inches) thick]
E'--99 to 139 centimeters (39 to 51 inches); brown (10YR 5/3) sand; single grain; loose; few fine roots; very strongly acid; clear wavy boundary. [0 to 61 centimeters (0 to 24 inches) thick]
Btg1--139 to 147 centimeters (51 to 58 inches); gray (10YR 6/1) sandy clay loam; weak medium subangular blocky structure; friable; few faint clay films on faces of peds; few fine and medium prominent yellow (10YR 7/6) and few medium prominent yellowish red (5YR 5/8) masses of oxidized iron; very strongly acid; clear wavy boundary.
Btg2--147 to 183 centimeters (58 to 72 inches); gray (10YR 5/1) sandy clay; moderate medium subangular blocky structure; firm; few faint clay films on faces of peds; few fine distinct light yellowish brown (10YR 6/4) and few fine prominent yellowish red (5YR 5/6) masses of oxidized iron; strongly acid.
TYPE LOCATION: Marion County, Florida; approximately 11.3 kilometers (7.0 miles) north of Fort McCoy, about 2 kilometers (1.25 miles) west of State Highway 315. NW 1/4, NW 1/4, Sec. 21, T. 12 S., R. 23 E.; Latitude and Longitude; 29 degrees 28 minutes 39.79 seconds, north and 81 degrees 59 minutes 8.2 seconds, west; WGS84.
RANGE IN CHARACTERISTICS:
Soil moisture control section: 30 to 90 centimeters (12 to 36 inches)
Solum thickness range: 114 centimeters (45 inches) or more
Aquic conditions: 0 to 30 centimeters (0 to 12 inches)
Ochric epipedon thickness: 25 to 89 centimeters (10 to 35 inches)
Depth to albic horizon: 8 to 20 centimeters (3 to 8 inches)
Depth to spodic horizon: 25 to 89 centimeters (10 to 35 inches)
Depth to argillic horizon: 91 to 203 centimeters (36 to 80 inches) or more
Reaction: extremely acid to moderately acid (pH 3.5 to 6.0) throughout except where the surface has been limed
Particle-size control section (weighted averages):
Clay content: 0 to 10 percent
Sand content: 30 to 75 percent
A or Ap horizon:
Hue: 10YR or Neutral
Value: 2 to 4
Chroma: 1 or 2
Texture: fine sand or sand
Clay content: 0 to 7 percent
Rock fragments: 0
EC (mmhos/cm): 0 to 2
E horizon:
Hue: 10YR or Neutral
Value: 5 to 8
Chroma: 1 or 2
Texture: fine sand or sand
Clay content: 0 to 6 percent
Rock fragments: 0
EC (mmhos/cm): 0 to 2
Redoximorphic features: depletions or concentrations, 1 to 20 percent, and fine or medium in size
Organic matter accumulations and/or depletions: faint or distinct, fine or medium, none to common
Bh horizon:
Hue: 5YR, 7.5YR, 10YR, or Neutral
Value: 2 or 3
Chroma: 1 to 4
Texture: fine sand or sand
Clay content: 2 to 10 percent
Rock fragments: 0
EC (mmhos/cm): 0 to 2
Redoximorphic features: depletions or concentrations, 1 to 20 percent, and fine or medium in size
Organic matter depletions: faint or distinct, fine or medium, none to common
BE or EB horizon, where present:
Hue: 10YR or Neutral
Value: 3 to 7
Chroma: 3 to 6
Texture: fine sand or sand
Clay content: 2 to 10 percent
Rock fragments: 0
EC (mmhos/cm): 0 to 2
Redoximorphic features: depletions or concentrations, 1 to 20 percent, and fine or medium in size
Organic matter depletions: faint or distinct, fine or medium, none to common
Bw horizon, where present:
Hue: 7.5YR or 10YR
Value: 3 or 4
Chroma: 2 to 4
Texture: fine sand or sand
Clay content: 2 to 10 percent
Rock fragments: 0
EC (mmhos/cm): 0 to 2
Fragments of Bh material ranges from 0 to 10 percent.
Redoximorphic features: depletions or concentrations, 1 to 20 percent, and fine or medium in size
Organic matter depletions: faint or distinct, fine or medium, none to common
E' horizon, where present:
Hue: 10YR
Value: 5 to 7
Chroma: 1 to 3
Texture: fine sand or sand
Clay content: 0 to 5 percent
Rock fragments: 0
EC (mmhos/cm): 0 to 2
Bh' horizon, where present:
Hue: 5YR, 7.5YR, 10YR, or Neutral
Value: 2 or 3
Chroma: 1 to 4
Texture: fine sand or sand
Clay content: 2 to 10 percent
Rock fragments: 0
EC (mmhos/cm): 0 to 2
Redoximorphic features: depletions or concentrations, 1 to 20 percent, and fine or medium in size
Organic matter depletions: faint or distinct, fine or medium, none to common
Btg horizon:
Hue: 10YR, 2.5Y, 5Y, or Neutral
Value: 5 to 7
Chroma: 1 or 2
Texture: sandy loam, fine sandy loam, or sandy clay loam
Clay content: 12 to 35 percent
Rock fragments: 0
EC (mmhos/cm): 0 to 2
Redoximorphic features: depletions or concentrations, 1 to 20 percent, and fine or medium in size
BCg or Cg horizon, where present:
Hue: 10YR or Neutral
Value: 5 to 7
Chroma: 1 or 2
Texture: sand to sandy clay
Clay content: 2 to 45 percent
Rock fragments: 0
EC (mmhos/cm): 0 to 2
Redoximorphic features: depletions or concentrations, 1 to 20 percent, and fine or medium in size
COMPETING SERIES:
Monteocha and
Tocoi soils have an umbric epipedon.
GEOGRAPHIC SETTING:
Parent material: sandy and loamy marine sediments
Landscape: Lower Coastal Plain
Landform: flats and flatwoods on marine terraces
Slopes: 0 to 2 percent
Elevation: 1.5 to 61 meters (5 to 200 feet)
Mean annual temperature: 20 to 25 degrees C (68 to 77 degrees F)
Mean annual precipitation: 1118 to 1524 millimeters (44 to 60 inches)
Frost-free period: 345 to 365 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Adamsville soils do not have spodic horizons and are on slightly higher landform positions.
Placid and
Pompano soils do not have spodic horizons and are on similar landform positions.
Cassia soils do not have argillic horizons and are on slightly higher landform positions.
Immokalee,
Myakka, and
Pomello soils do not have argillic horizons and are on similar landform positions.
Wauchula soils have an argillic horizon within a depth of 91 centimeters (36 inches) of the surface and are on similar landform positions.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class: very poorly to poorly drained
Saturated hydraulic conductivity (Ksat): moderately high to very high in the A and E horizons and moderately high to high in the Bh and Btg horizons.
Permeability: rapid to moderate in the A and E horizons and moderate slow to moderate permeability in the Bh and Btg horizons.
Runoff: negligible to very low.
Depth to seasonal high water table: 0 to 30 centimeters (0 to 12 inches) of the surface for about 3 months during most years, and 25 to 102 centimeters (10 to 40 inches) most of the rest of the year.
Ponding: 0 to 61 centimeters (0 to 24 inches) in depressional areas for 4 to 6 months
USE AND VEGETATION:
Under natural conditions Pomona soils are used for water quality and wildlife habitat. Cultivated areas are used for truck crops and tame pasture.
Potential native vegetation consists of slash pine, longleaf pine, and south Florida slash pine with an understory of sawpalmetto, waxmyrtle, gallberry, creeping bluestem, chalky bluestem, indiangrass, and pineland threeawn.
DISTRIBUTION AND EXTENT:
Major Land Resource Area (MLRA): Southern Florida Flatwoods (MLRA 155), South Central Florida Ridge (MLRA 154), and Southern Florida Lowlands (MLRA 156B)
Extent: Moderate
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Auburn, Alabama
SERIES ESTABLISHED:
Marion County, Florida; 1974.
REMARKS:
Particle sized control section: 25 to 100 centimeters (10 to 40 inches)
Diagnostic horizons and features in this pedon:
Ochric epipedon - 0 to 66 centimeters (0 to 26 inches) (A, E1, and E2 horizons)
Albic horizon - 13 to 66 centimeters (5 to 26 inches) (E1 and E2 horizons)
Spodic horizon - 66 to 91 centimeters (26 to 36 inches) (Bh1 and Bh2 horizons)
Argillic horizon - 130 to 183 centimeters (51 to 72 inches) (Btg1 and Btg2 horizons)
Aquic conditions - 0 to 30 centimeters (0 to 12 inches)
Endosaturation - 0 to 203 centimeters (0 to 80 inches)
Soil classified according to the 12th Edition of the Keys to Soil Taxonomy.
Ponded and depressional phases need to be investigated to determine if a new series is necessary.
ADDITIONAL DATA:
Laboratory data is available on the National Soil Survey website at: http://ncsslabdatamart.sc.egov.usda.gov/querypage.aspx
National Cooperative Soil Survey
U.S.A.