Two Spodosols in Alachua County, FL

Geoffrey LokutaEnvironmental PedologyMarch 10, 2012

Alachua Co., FL

-Northeast of Gainesville, FL-Austin Cary Memorial Forest

Study Site Location

Study Site Location

Soil pit

Road

100 feet

NRCS Map Units

19

14

08

14- Pomona Sand

08- Millhopper Sand

Soil pit

Road

Study Site Location

Soil 2

Soil 1

Soil 1 Landscape

Soil 1 Profile

Position of Site: UplandParent Material: MarineSoil Slope: Nearly Level (0-2%)Surface Runoff: Very SlowErosion Potential: Very Low

Epipedon: OchricSubsurface Horizon: Albic, Spodic, ArgillicOrder: Spodosol

A- 0 to 6 cm; 10YR 3/1; sand; single grained; loose; clear wavy boundary E1- 6 to 17 cm; 10YR 5/2; sand; single grained; loose; clear wavy boundary

E2- 17 to 54 cm; 10YR 6/1; sand; single grained; loose; clear wavy boundary

Bh- 54 to 69 cm; 7.5YR 4/2; sand; single grained; loose; clear wavy boundary BE- 69 to 85 cm; 10YR 5/3; sand; single grained; loose; abrupt wavy boundary

E’- 85 to 121 cm; 10YR 8/1; sand; single grained; loose; abrupt wavy boundary

Btg1- 121 to 146 cm; 10YR 5/2; loamy sand; weak subangular blocky; very friable; clear wavy b. Btg2- 146 to 169 cm; 10YR 6/2; sandy clay loam; weak subangular blocky; very friable

Horizon LD/LD without spoil (cm)

B dist

B topo

Texture

Dom color

Str grade

Str shape

Consist

C (spoil) 21 a s ls 10 YR 6/2 sl sg l

A 27 6 c w s 10 YR 3/1 sl sg l

E1 38 17 c w s 10 YR 5/2 sl sg l

E2 75 54 c w s 10 YR 6/1 sl sg l

Bh 90 69 c w s 7.5 YR 4/2

sl sg l

BE 106 85 a w s 10 YR 5/3 sl sg l

E’ 142 121 a w s 10 YR 8/1 sl sg l

Btg1 167 146 c w ls 10 YR 5/2 wk sbk vfr

Btg2 190 169 scl 10 YR 6/2 wk sbk vfr

Soil 2 Landscape

Soil 2 Profile

Position of Site: UplandParent Material: MarineSoil Slope: Nearly Level (0-2%)Surface Runoff: Very SlowErosion Potential: Very Low

Epipedon: OchricSubsurface Horizon: Albic, Spodic, ArgillicOrder: Spodosol

A- 0 to 11 cm; 10YR 3/1; sand; single grained; loose; clear wavy boundary

AE- 11 to 45 cm; 10YR 6/1; sand; single grained; loose; clear wavy boundary

E- 45 to 76 cm; 10YR 8/1; sand; single grained; loose; abrupt irregular boundary Bh1- 76 to 83 cm; 7.5YR 3/2; sand; single grained;

loose; clear wavy boundary Bh2- 83 to 90 cm; 5YR 3/3; sand; single grained; loose; clear wavy boundaryBE- 90 to 108 cm; 10YR 6/3; sand; single grained; loose; clear wavy boundary E’- 108 to 160 cm; 10YR 8/1; sand; single grained; loose; clear wavy boundary

Btg1- 160 to 187 cm; 10YR 6/2; loamy sand; weak subangular blocky; very friable; clear wavy boundary

Btg2- 146 to 169 cm; 7.5YR 3/2; loamy sand; weak subangular blocky; very friable

Horizon LD (cm)

B dist

B topo

Texture Dom color

Str grade

Str shape

Consist

A 11 c w s 10 YR 3/1

sl sg l

AE 45 c w s 10 YR 6/1

sl sg l

E 76 a I s 10 YR 8/1

sl sg l

Bh1 83 c w s 7.5 YR 3/2

sl sg l

Bh2 90 c w s (maybe ls)

5 YR 3/3 sl sg l

BE 108 c w s 10 YR 6/3

sl sg l

E’ 160 c w s 10 YR 8/1

sl sg l

Btg1 187 c w ls 10 YR 6/2

wk sbk vfr

Btg2 200 ls 7.5 YR 3/1

wk sbk vfr

Soils Comparison

Soil Property/ Interpretation Soil 1 Soil 2

Infiltration Rate High HighHydraulic Conductivity Moderate HighAvailable Water Low Very LowSHWT Depth 50 to <100 cm 50 to < 100 cmDwellings w/ Basement Limitation

Severe Severe

Septic Tank Absorption Fields Limitation

Severe Severe

Local Roads and Streets Limitation

Slight Slight

QUESTIONS?