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Site SW26

Location: Camperdown.Australian Soil Classification: Humose, Calcic, Black DERMOSOL (clayey).
General Landscape Description: Level plain.Mapping Unit: Unit 2 (Maher and Martin, 1987).
Site Description: Grazing paddock (dairy).Geology: Quaternary Newer volcanics (scoria).

Image: SW26 Landscape
Site SW26 landscape


Soil Profile Morphology:

Surface Soil

A10-10 cm Black (10YR2/1); light clay; strong medium polyhedral structure; very firm consistence dry; pH 6.7; clear change to:

Image: SW26 Profile
Site SW26 profile photo.
Subsoil

B2110-30 cmVery dark grey (7.5YR3/0); light clay; strong medium polyhedral, parting to strong fine blocky structure; firm consistence moist; pH 7.7; gradual change to:

B2230-60 cmVery dark grey (10YR3/1); medium clay; strong medium blocky, parting to strong fine blocky structure; very firm consistence moist; pH 8.5; gradual change to:

B2360-100 cmVery dark grey (10YR3/1); medium clay; strong medium blocky, parting to strong fine blocky structure; very firm consistence moist; contains a few (5-10 %) calcareous nodules and soft segregations; pH 8.8; gradual change to:

B24100-130 cmVery dark grey (10YR3/1); medium clay; contains a common (20%) amount of calcareous nodules and soft segregations; pH 8.7; abrupt change to:

C130+ cmVolcanic ash deposits.

Key Profile Features:
Key Profile Characteristics:


pH

Salinity Rating
Surface
(A1 horizon)
Slightly Acid
Moderate
Non-Sodic
None1
Subsoil
(B21 horizon)
Slightly Alkaline
Moderate
Non-Sodic
Strong2
Deeper subsoil
(at 1 m)
Strongly Alkaline
Moderate
Sodic
Moderate3
1. Slight dispersion after remoulding.
2. Complete dispersion after remoulding.
3. Strong dispersion after remoulding.

Image: SW26 pH
Image: SW26 Salinity
The surface horizon is slightly acid. The upper subsoil is slightly alkaline becoming strongly alkaline at 80 cm depth.
The surface has a moderate salinity rating. The subsoil is high at 45 cm then decreases with depth.
Image: SW26 Sodicity
Image: SW26 Clay
The surface is non-sodic. The subsoil becomes sodic at 25-30 cm depth.
The clay content increases gradually down the profile.

Horizon
Horizon Depth
(cm)
pH
(water)
pH
CaCl2
EC
1:5
NaCl
%
Exchangeable Cations
Ca
Mg
K
Na
meq/100g
A1
0-10
6.7
0.4
0.4
19
11
1.7
1
B21
10-30
7.7
0.38
0.38
0.04
19
18
4.8
2.8
B22
30-60
8.5
0.79
0.79
0.09
16
21
6.8
4.7
B23
60-100
8.8
0.4
0.4
0.03
13
18
6.5
2.7
B24
100-130
8.7
0.37
0.37
0.02
13
16
5.4
2.3
C
130+

Horizon
Horizon Depth
(cm)
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)
A1
0-10
63
37
8
15
17
44
B21
10-30
64
40
3
14
32
39
B22
30-60
70
43
1
7
24
57
B23
60-100
61
38
1
5
22
54
B24
100-130
0
34
1
6
10
57
C
130+

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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