Soil Classification Comparison
Hall County, Georgia
University of Florida
Soil Pedology, Spring 2010
Prof: Willie Harris
By: Sam Vacca
4/22/10
Site Location
• Hall County, Georgia
• Nearest City: Gainesville, Georgia
• Physiographic Province: Piedmont
• Annual Precipitation: 54.75 inches
• Annual Temperature: 61 degrees F
• Predominant Land Use: Agriculture
Soil Profile Locations
Site Topography
Site Landscape
Soil Survey
Cc (Pink) – Cartecay and Chewacla Undifferentiated Group
(Floodplains; 0 – 2% Slopes; High Water Table)
PaE (Blue) – Pacolet Soil Series
(Sandy Loam; 15-25% Slopes; Weathered Rock)
Soil Profile 1
Perennial Stream
Alluvial System
Broad Floodplain
Receiving Waterway
Degraded Channel
Channel Incision
Lack of Vegetation
Heavy Cattle Use
Soil Profile 1
MORPHOLOGY
Ap1 -- 0-11 inches; dark grayish brown (10yr 4/2);
clay loam; weak sub-angular blocky structure; friable;
clear smooth boundary; many roots.
Ap2 -- 11-18 inches; dark grayish brown (10yr 4/2);
clay loam; moderate sub-angular blocky structure;
friable; abrupt smooth boundary.
Bw1 -- 18-28 inches; yellowish red (5yr 4/6); silt clay
loam; strong platy structure; friable; gradual smooth boundary.
Bw2 – 28-39.5 inches; yellowish red (5yr 5/8); loamy
sand; structureless massive structure; very friable;
distinct smooth boundary.
Btg1 – 39.5-67 inches; dark grayish brown (2.5y 4/2);
silt loam; strong sub-angular blocky structure; friable; gradual
smooth boundary; redoximorphic features (low chroma,
Fe concentrations/mottles).
Btg2 – 67-70 inches; black (2.5y 2.5/1); silt loam; strong angular
blocky structure; friable; abrupt smooth boundary;
redoximorphic features.
C1 – 70-72 inches; yellowish brown (10yr 5/4); sand;
structureless single grain structure; loose; abrupt smooth
boundary; line of oxidized Fe above and below.
C2 – 72-76+ inches; dark gray (10yr 4/1); sand; structureless
single grain structure; loose; gravelly.
Ap1
Soil Profile 1
Bw1 -- 18-28 inches; yellowish red (5yr 4/6); silt clay
loam; strong platy structure; friable; gradual smooth boundary.
Ap2
Btg1 – 39.5-67 inches; dark grayish brown (2.5y 4/2);
silt loam; strong sub-angular blocky structure; friable; gradual
smooth boundary; redoximorphic features (low chroma,
Fe concentrations/mottles).
Bw2
C1 – 70-72 inches; yellowish brown (10yr 5/4); structureless
single grain structure; loose; abrupt smooth boundary;
line of oxidized Fe above and below.
Btg2
C2
Soil Profile 1
SOIL PROPERTIES
• Infiltration Rate: Moderate
• Hydraulic Conductivity: Moderate
• Available Water: Moderate
• Seasonal High Water Table: 100 – <150cm
SOIL INTERPRETATIONS
Dwellings with Basement: Severe
Septic Tank Absorption Fields: Severe
Local Roads and Streets: Moderate
SITE CHARACTERISTICS
• Position: Floodplain
• Parent Material: Fluvial
• Soil Slope: 2-6%
• Surface Runoff: Slow
• Erosion Potential: Medium
SOIL CLASSIFICATION
• Epipedon: Ochric
• Subsurface Horizon: Argillic
• Order: Ultisol
Soil Profile Locations
Soil Profile 2
Perennial Stream
Colluvial System
Steep Riparian Slopes
Tributary to Stream 1
Stable Channel
Vegetated Banks
No Cattle Use
Soil Profile 2
MORPHOLOGY
A -- 0-10 inches; very dark grayish brown (10yr 3/2); loam; weak
granular structure; friable; gradual smooth boundary; many
roots.
Bt1 – 10-36 inches; brown (7.5yr 4/4); clay loam; strong angular
blocky structure; firm; diffuse smooth boundary.
Bt2 – 36-48 inches; brown (7.5yr 4/3); loamy sand; structureless
single grain structure; loose; diffuse smooth boundary; gravelly;
C1 – 48-60 inches; brown (7.5yr 4/3); loamy
sand; structureless single grain structure; loose; diffuse smooth
boundary; very cobbly.
C2 – 60-68+ inches; no true matrix color; sandy loam (when
crushed); moderate platy structure; firm; clear smooth boundary.
Soil Profile 2
SOIL PROPERTIES
• Infiltration Rate: Moderate
• Hydraulic Conductivity: Moderate
• Available Water: Moderate
• Seasonal High Water Table: 25 – 50cm
SOIL INTERPRETATIONS
Dwellings with Basement: Severe
Septic Tank Absorption Fields: Severe
Local Roads and Streets: Severe
SITE CHARACTERISTICS
• Position: Drainageway/Floodplain
• Parent Material: Fluvial
• Soil Slope: 12-20%
• Surface Runoff: Very Rapid
• Erosion Potential: Very High
SOIL CLASSIFICATION
• Epipedon: Umbric
• Subsurface Horizon: Argillic
• Order: Ultisol
Soil Profile 1
Soil Comparison
Soil Profile 2
What a
PEST!
Do you ever wonder if
perhaps we contribute to
the pedological processes
out here?
Oh, don’t
start,
Willie!