Alaga Series

• Major Land Resource Area: 138—North-Central Florida Ridge
• Local physiographic area: Coastal Plain
• Geomorphic setting: Uplands
• Parent material: Sandy marine deposits
• Drainage class: Somewhat excessively drained
• Permeability class: Rapid
• Soil depth class: Very deep
• Shrink-swell potential: Low
• Slope: 0 to 5 percent
• Taxonomic classification: Thermic, coated Typic Quartzipsamments

Associated Soils

The Alaga soils are commonly associated on the landscape with Alpin, Blanton, Chipley, Foxworth, and Troup soils.

• The Alpin soils have thin lamellae at a depth of 40 to 78 inches, have 5 to 10 percent silt plus clay in the particle-size control section, and are excessively drained.
• The Blanton soils have sandy surface and subsurface layers with a combined thickness of 40 to 80 inches and are moderately well drained.
• The Chipley soils are somewhat poorly drained.
• The Foxworth soils are moderately well drained.
• The Troup soils have sandy surface and subsurface layers with a combined thickness of 40 to 80 inches.

Typical Pedon

Alaga loamy fine sand, 0 to 5 percent slopes; about 2.0 miles north of Florida Highway 6 and 0.38 mile east of secondary road 255; sec. 11, T. 1 N., R. 10 E.; Pinetta, Florida, USGS 7.5-minute quadrangle; lat. 30 degrees, 30 minutes, 23 seconds north and long. 83 degrees, 17 minutes, 50 seconds west.

• A1—0 to 4 inches; very dark grayish brown (10YR 3/2) loamy fine sand; weak fine granular structure; very friable; very strongly acid; gradual wavy boundary.
• A2—4 to 9 inches; dark brown (10YR 3/3) loamy sand; weak fine granular structure; very friable; strongly acid; gradual wavy boundary.
• C1—9 to 29 inches; brown (7.5YR 4/4) loamy sand; single grain; loose; very strongly acid; gradual wavy boundary.
• C2—29 to 58 inches; strong brown (7.5YR 5/6) loamy sand; single grain; loose; very strongly acid; gradual wavy boundary.
• C3—58 to 72 inches; reddish yellow (7.5YR 6/8) sand; single grain; loose; very strongly acid; gradual wavy boundary.
• C4—72 to 80 inches; brownish yellow (10YR 6/6) sand; single grain; loose; very strongly acid.

Range in Characteristics

• The profile is more than 80 inches thick. The content of silt plus clay in the 10- to 40-inch control section ranges from 10 to 25 percent with a clay content of 2 to 10 percent. Reaction ranges from extremely acid to moderately acid throughout, except where lime has been applied.
• The A or Ap horizon has hue of 10YR, value of 3 or 4, and chroma of 2 or 3. The texture is loamy sand, loamy fine sand, or fine sand.
• The C horizon dominantly has hue of 7.5YR to 2.5Y, value of 4 to 8, and chroma of 4 to 8. In some pedons, however, it has chroma of 2 or less at depth of 40 inches or more. The texture is loamy sand, fine sand, loamy fine sand, or sand.

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