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GP81

Location: Athlone Aust. Soil Class.: Melacic, Dermosolic, Redoxic HYDROSOL
Site Description: Drainage line between rises.Geology: Cretaceous sandstone.

Image: GP80 and GP81 landscape
GP81 Landscape

Soil Profile Morphology:

Surface Soil

O0-5 cmOrganic mat in pasture.

Image: GP81 profile
GP81 Profile
A15-15 cmVery dark greyish brown (10YR 3/2), light fine sandy clay loam; pH 5.0; clear change to:

A2115-30 cmGreyish brown (10YR 5/2) with yellowish brown (10YR 5/6) mottles; light fine sandy clay loam; pH 5.0; gradual change to:

A2235-80 cmGreyish brown (10YR 5/2) with yellowish brown (10YR 5/8) mottles; light fine sandy clay loam; pH 5.2; gradual change to:

Subsoil
B2180+ cmLight brownish grey (10YR 6/2) with yellowish brown (10YR 5/8) mottles; fine sandy clay loam; medium coarse polyhedral parting to strong medium polyhedral structure; pH 5.3.

Key Profile Features:

  • Soil profile is saturated for a number of months in most years.
Soil Profile Characteristics:

pH
Salinity Rating
Surface
(A1 horizon)
Strongly Acid
High
Non-Sodic
None
Subsoil
(B21 horizon)
Strongly Acid
Low-Medium
Non-Sodic
None


GP81 graphs
GP81 graphs

Horizon
Horizon Depth
pH (water)
pH CaCl2
EC
1:5
NaCl
Exchangeable Cations
Ca
Mg
K
Na
Meq/100g
A1
5-15
5.0
4.4
0.69
2.5
1.8
<0.1
0.6
A21
15-80
5.0
4.5
0.47
1.1
1.2
<0.1
0.4
A22
30-80
5.2
4.9
0.39
1.0
1.2
<0.1
0.3
B21
80+
5.3
4.6
0.34
1.9
2.8
0.1
0.7

Horizon
Horizon Depth
Ex Al
mg/kg
Ex Ac
meq/100g
Field
pF 2.5
Wilting Point
pF4.2
g/100g
Coarse Sand
(0.2-2.0mm)
%
Fine Sand
(0.02-0.2mm)
%
Silt
(0.002-0.02mm)
%
Clay
(<0.002mm)
%
A1
5-15
47
14
32.2
21.9
2.6
45.4
37.0
10.5
A21
15-80
68
7.8
26.4
6.4
2.2
49.9
34.5
11.0
A22
30-80
77
7.5
27.9
5.9
1.4
49.7
34.5
11.5
B21
80+
21
7.3
28.0
15.5
1.0
32.4
40.5
25.0

Management Considerations:

Whole Profile

  • The profile is likely to be saturated for a number of months in most years, which will restrict the growth of a number of species.
  • The strongly acid profile indicates that manganese toxicity may occur – particularly in waterlogging conditions.
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