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Site SW61

Location: Simpson.Australian Soil Classification: Melacic, Humic/Humosesquic, Semiaquic PODOSOL
Great Soil Group: podzolGeneral Landscape Description: Plateau of dissected Tertiary sediments within a gently undulating plain.
Site Description: Level to slightly sloping plain.Geology: Hanson Plain Sand

Image:  GP61 Landscape
Site SW61 Landscape.


Soil Profile Morphology:

Surface Soil

A10-45 cmBlack (7.5YR2.5/1 moist, 7.5YR3/1 dry); loamy fine sand; apedal; pH 4.2; clear and smooth change to:

Image:  GP61 Profile
Site SW61 profile.
A245-65/75 cmGrey (10YR5/1 moist); light grey (10YR7/1 dry); loamy medium sand; apedal; pH 4.4; abrupt and irregular change to:

Subsoil

B21h65/75-90 cmBlack (7.5YR2.5/1 moist and dry); sandy loam; massive; pH 4.2; clear and wavy change to:

B22hs90-100/110 cmVery dark brown (10YR2/2 moist); cemented sand 'coffee rock'; massive; pH 4.5; abrupt and wavy change to:

B23s100/110 cm+Mottled yellow (2.5Y7/6 moist), yellowish brown (10YR5/8 moist) and dark red (2.5YR4/8 moist) mottling; cemented sand; massive; pH 4.8.

Key Profile Features:
  • Deep sandy profile.
  • Presence of humic and humosesquic horizons in subsoil.

Key Profile Characteristics:


pH
Salinity Rating
Surface
(A1 horizon)
Extremely Acid
Low
Non-Sodic
None
Subsoil
(B21 horizon)
Extremely Acid
Low
Non-Sodic
None
Deeper subsoil
(at 90+ cm)
Very Strongly Acid
Low
Non-Sodic
None

Image:  GP61 Graphs

Horizon
Horizon Depth
(cm)
pH
(water)
pH
CaCl2
EC
1:5
Exchangeable Cations
Ca
Mg
K
Na
meq/100g
A1
0-10
4.2
3.1
0.11
0.71
1.1
0.45
0.37
A2
45-70
4.4
3.6
<0.05
<0.05
0.15
0.05
0.07
B21
70-90
4.2
3.3
0.09
B22
90-105
4.5
4.1
0.1
B23
105+
4.8
4.8
0.09

Horizon
Horizon Depth
(cm)
Exchangeable Aluminium
mg/kg
Exchangeable Acidity
meq/100g
Coarse Sand
(0.2-2.0 mm)
Fine Sand
(0.02-0.2 mm)
Silt
(0.002-0.02 mm)
Clay
(<0.002 mm)
A1
0-10
42
18
34
43
15
3
A2
45-70
<10
2
34
48
19
<1
B21
70-90
30
45
17
6
B22
90-105
B23
105+


Profile Described By: Mark Imhof and Richard MacEwan, April 1999.
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