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SW23

Location: Simpson

Australian Soil Classification: Acidic, Mesotrophic, Brown DERMOSOL

Map Unit: Tomahawk Creek Land System (Pitt, 1981).

General Landscape Description: Grazing paddock (dairy).
Site Description: Creek Terrace.
Geology: Tertiary - Moorabool Viaduct Formation.

Image: SW23 Landscape
SW23 Landscape


Soil Profile Morphology:

Surface Soil

A10-10 cm Dark brown (10YR3/3); fine sandy clay loam; weak consistence moist; pH 5.6; abrupt change to:

Image: SW23 Profile
SW23 Profile
A210-25 cmLight brownish grey (10YR6/2); fine sandy clay loam; weak coarse blocky structure; rusty root channel mottling present; pH 5.4; clear change to:

Subsoil
B125-40 cmLight yellowish brown (2.5Y6/4) with reddish yellow (7.5YR6/6) mottles; fine sandy clay loam; weak to moderate coarse blocky structure; pH 5.2; clear change to:

B2140-70 cmBrown (10YR5/3) with reddish yellow (7.5YR6/6) mottles; fine sandy clay; moderate coarse blocky, parting to strong medium polyhedral structure; pH 5.0; clear change to:

B2270+ cmLight brownish grey (10YR6/2) with brownish yellow (10YR6/6); light medium clay; weak very coarse prismatic, parting to strong coarse blocky, parting to strong fine polyhedral structure; pH 5.0.

Key Profile Features:
Soil Profile Characteristics:



pH



Salinity Rating
Surface
(A1 horizon)
Moderately Acid
low
Non-sodic
none
Subsoil
(B21 horizon)
Strongly Acid
low
Non-sodic
none
Deeper Subsoil
(at 70+ cm)
Strongly Acid
Very low
Non-sodic
none


Image: SW23 Graphs
The surface soil is moderately acid. The subsoil is strongly acid. The salinity rating throughout the profile is low to very low.The surface and subsoil is non-sodic. The clay content increases gradually down the profile.


Horizon
Horizon Depth
(cm)
pH
(water)
pH
CaCl2
EC
(dS/m)
Exchangeable Cations
Ca
Mg
K
Na
meq/100g
A1
0-10
5.6
4.9
0.15
5.4
1.1
0.2
0.1
A2
10-25
5.4
4.6
0.1
1.9
0.8
0.3
0.05
B1
25-40
5.2
4.3
0.11
1.7
1.3
0.3
0.1
B21
40-70
5
4.2
0.13
1.8
1.8
0.3
0.2
B22
70+
5
4.2
0.15
2.2
3.9
0.3
0.3

Horizon
Horizon Depth
(cm)
Acidity
meq/100g
Oxidisable Organic Carbon
%
Total
Nitrogen
%
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
4.3
0.33
36
13
5
43
25
16
A2
10-25
26
8
2
50
30
16
B1
25-40
7.6
27
11
2
47
26
25
B21
40-70
9.1
29
13
2
42
26
30
B22
70+
31
17
1
35
21
42

Profile described by: Mark Imhof and Austin Brown (May 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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