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SW96

SW96  landscape
General landscape view from SW96

    Site Code
SW96
SW96  profile
Vertic (& Sodic), Hypercalcic, Black DERMOSOL

    Location
Steiglitz road, north west of junction with Geelong-Ballan road
    Landform
Undulating rises
    Geology
Quaternary Volcanics: basalt
    Element
Upper slope
    Slope
3%
    Aspect
West
Horizon
Depth (cm)
Description
Ap
0-15 Greyish brown (10YR5/2 moist); loam; hardsetting; pH 5.6; gradual boundary to:

B21tg
15-40/70 Very dark grey (10YR3/1 moist) to greyish brown (2.5Y5/2 moist); fine to medium yellowish brown (10YR5/8 moist) mottles in centre of peds; mottles increase with depth; light clay; medium angular blocky structure; some slickensides (<100 mm); pH 8.1 clear boundary to:

B22k/R
40/70+ Calcareous clay and rock matrix; basalt ranging from massive, fractured to rounded.

Management considerations
This shallow rocky soil is a feature of many parts of the Victorian Volcanic Plain. The hard-setting surface soil can form surface seals when left bare (e.g. when cultivated or over grazed) which reduce infiltration and encourage surface runoff. The sodic clay subsoil is dispersive and has high shrink-swell behaviour which can restrict water movement through the profile. This soil is prone to waterlogging. Acidity is an issue in the topsoil.

Analytical data
Site SW96
Sample
depth
pH
EC
NaCl
Ex Ca
Ex Mg
Ex K
Ex Na
Ex Al
Ex acidity
FC
(-10kPa)
PWP
(-150kPa)
KS
FS
Z
C
Horizon
cm
H2O
CaCl2
dS/m
%
cmolc/kg
cmolc/kg
cmolc/kg
cmolc/kg
mg/kg
cmolc/kg
%
%
%
%
%
%
A
0-15
5.6
4.9
0.15
N/R
5.8
5
1.1
0.59
<10
12
22.8
12.4
21.2
36.7
10.5
27.5
Btg
25-40
8.1
7.1
0.14
N/R
12
12
0.74
1.8
N/R
N/R
40
21.3
16.1
26.6
9
42
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