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Site SW63

Location: Simpson.Australian Soil Classification: Humose, Sesquic, Aquic PODOSOL (thick sandy surface/clay loamy subsoil).
General Landscape Description: Gently undulating plain.Site Description: Flat Plain.
Geology: Hanson Plain Sand.

Image: GP63 Landscape
Site SW63 Landscape


Soil Profile Morphology:

Surface Soil

Ah0-50 cmBlack (10YR2/1 moist); loamy sand; apedal; weak consistence; many whitish sand grains; horizon becomes paler to dark grey (10YR4/1) at about 15 cm but the difference is not marked enough to be described as an A2; pH 5.1; abrupt and wavy change to:Image: GP63 Profile
Site SW63 profile
Subsoil
B21sm50-52 cmDark brown (10YR3/3) to dark yellowish brown (10YR3/4); light fine sandy clay loam; weakly cemented thin pan; firm consistence; clear change to:

B22sg52-80/90 cm+Mottled light olive brown (2.5Y5/3 moist), pale yellow (2.5Y7/3 dry) and olive yellow (2.5Y6/6); fine sandy clay loam; apedal massive; firm consistence; pH 4.6; diffuse change to:

B23g80/90+ cmMottled light yellowish brown (2.5Y6/3); light grey (2.5Y7/2 dry) and yellowish brown (10YR5/8); loam; apedal massive; pH 4.6.

Key Profile Features
  • Thick organic matter rich surface (A1) horizon.

Key Profile Characteristics


pH

Salinity Rating
Surface
(A1 horizon)
Strongly Acid
Low
Non-Sodic
None
Subsoil
(B21 horizon)
Very Strongly Acid
Low
Non-Sodic
None
Deeper subsoil
(85+ cm)
Very Strongly Acid
Low
Non-Sodic
None
Image: GP63 Graphs

Horizon
Horizon Depth
(cm)
pH
(water)
pH
CaCl2
EC
1:5
Exchangeable Cations
Ca
Mg
K
Na
meq/100g
A
0-50
5.1
3.9
0.12
2.8
0.52
0.55
0.31
B22sg
50-85
4.6
4.4
0.1
0.09
0.1
<0.05
0.23
B23g
85+
4.6
4.2
0.07
<0.05
0.17
<0.05
0.16

Horizon
Horizon Depth
(cm)
Exchangeable
Aluminium
mg/kg
Exchangeable
Acidity
meq/100g
Field
Capacity
pF2.5
Wilting
Point
pF4.2
Coarse Sand
(0.2-2.0 mm)
Fine Sand
(0.02-0.2 mm)
Silt
(0.002-0.02 mm)
Clay
(<0.002 mm)
A
0-50
59
19
23
11
26
43
15
3
B22sg
50-85
160
11
18
8
17
47
16
17
B23g
85+
170
4.9
14
5
18
48
19
16

Management Considerations:

Subsoil (B) Horizons
  • High level of exchangeable aluminium in very strongly acid subsoil.
  • Low level of inherent fertility.
Profile Described By: Mark Imhof and Richard MacEwan, April 1999.
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