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SW52

Location: Cowleys Creek

Australian Soil Classification: Vertic (& Bleached-Acidic), Eutrophic, Grey DERMOSOL

Map Unit: Unit 158 (Maher and Martin, 1987).

General Landscape Description: Gently undulating rises.
Site Description: Grazing paddock (dairy).
Geology: Tertiary - Gellibrand Marl.

Image: SW52 Landscape
SW52 Landscape


Soil Profile Morphology:

Surface Soil

A10-12 cmVery dark greyish brown (10YR3/2); very fine sandy clay loam; weak to moderate medium blocky structure; pH 5.3; clear change to:

Image: SW52 Profile
SW52 Profile
A212-20 cmPale brown (10YR6/3), conspicuously bleached; rusty root channel mottling; very fine sandy clay loam; moderate medium blocky structure; pH 4.9; gradual change to:

Subsoil

B2120-35 cmPale brown (10YR6/3) with a few yellowish brown (10YR5/8) mottles; light clay; moderate coarse blocky, parting to strong medium blocky structure; pH 4.9; gradual change to:

B2235-65 cmBrown (10YR5/3) with many yellowish brown (10YR5/8) mottles; medium clay; moderate coarse prismatic, parting to strong medium polyhedral structure; pH 4.9; gradual change to:

B2365+ cmGrey (10YR6/1) with many yellowish brown (10YR5/8) mottles; medium clay; strong coarse polyhedral, parting to strong fine polyhedral structure; many slickensides evident; pH 5.2.

Deeper SubsoilYellowish brown (10YR5/8); clay; contains calcareous segregations.




Key Profile Features:
Soil Profile Characteristics:

pH
Salinity Rating
Surface
(A1 horizon)
Strongly Acid
Low-Moderate
Non-Sodic
None
Subsoil
(B21 horizon)
Very Strongly Acid
Low
Non-Sodic
None1
Deeper Subsoil
(at 65+ cm)
Strongly Acid
Low
Non-Sodic
Slight2
1. Slight dispersion after remoulding. 2. Strong dispersion after remoulding.

Image: SW52 Graphs
The profile is strongly to very strongly acid throughout.
This profile has a mainly low salinity rating throughout.
The clay content increases gradually with depth.

Horizon
Horizon Depth
(cm)
pH
(water)
pH
CaCl2
EC
1:5
NaCl
%
Exchangeable Cations
Ca
Mg
K
Na
meq/100g
A1
0-12
5.3
4.6
0.27
0.01
5.3
2.2
1
0.1
A2
12-20
4.9
4.2
0.13
2.6
1.5
0.4
0.05
B21
20-35
4.9
4.1
0.12
2.8
2.4
0.3
0.2
B22
35-65
4.9
4.2
0.23
6.7
5.8
0.4
0.4
B23
65+
5.2
4.4
0.21
7.9
8.8
0.2
1.3

Horizon
Horizon Depth
(cm)
Field
Capacity
pF2.5
Wilting
Point
pF4.2
Acidity
meq/100g
Oxidisable Organic Carbon
%
Total
Nitrogen
%
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
0-12
43
16.5
5.3
0.5
3
35
31
18
A2
12-20
30.8
10
1
40
35
22
B21
20-35
30.2
13.6
9.1
1
34
34
31
B22
35-65
41.3
23
1
19
18
59
B23
65+
45.2
23.2
1
15
21
58


Profile Described By: Mark Imhof and Austin Brown (August 1998).
CC BY 4.0 AU

This page contains material sourced from the Victorian Resources Online (VRO) website, originally published by the State Government of Victoria.

The content is provided under the Creative Commons Attribution 4.0 Australia licence (CC BY 4.0 AU).

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