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MM5050

Site code

      MM5050
Location
      Barrabool Hills (Polleys Road), Geelong district, south-west Victoria
Landform
      Rolling hills
Geology
      Cretaceous sedimentary: Eumeralla Formation: fluvial volcanolithic sandstone, siltstone, mudstone, coal
Element
      Crest

Profile morphology
Horizon

Depth (cm)

Description

A1
0–15
Very dark greyish brown (10YR3/2); fine sandy loam; apedal massive structure; weak consistence (dry); clear boundary to:
A2
15–40
Pale brown (10YR6/3), conspicuously bleached, light grey (10YR7/2 dry); fine sandy loam; weak consistence (dry); sharp boundary to:
B21
40–65
Yellowish brown (10YR5/6) with red (2.5YR4/6) mottles; heavy clay; strong coarse blocky structure; strong consistence (dry); gradual boundary to:
B22
65+
Light yellowish brown (2.5Y6/4) with brown (10YR5/8) mottles; medium clay; strong coarse blocky structure; firm consistence (moderately moist).

ASC: Eutrophic, Mottled-Mesonatric, Brown Sodosol

Analytical data Source: Government of Victoria, State Chemistry Laboratory.

Site MM5050
Sample
depth
pH
EC
NaCl
Ex Ca
Ex Mg
Ex K
Ex Na
Ex Al
Ex acidity
Horizon
cm
H2O
CaCl2
dS/m
%
cmolc/kg
cmolc/kg
cmolc/kg
cmolc/kg
mg/kg
cmolc/kg
A1
0–15
5.7
N/R
0.1
N/R
3.3
3.3
0.2
0.4
N/R
9.4
A2
15–40
6.3
N/R
0.08
N/R
1.5
1.5
0.1
0.6
N/R
4.6
B21
40–65
6.8
N/R
0.27
0.05
1
1
0.5
3.9
N/R
7.1
B22
65+
7.6
N/R
N/R
0.05
0.5
0.5
0.4
3.8
N/R
3.1

Site MM5050
Sample
depth
FC
(-10kPa)
PWP
(-1500kPa)
KS
FS
Z
C
Org C
Bulk density
Horizon
cm
%
%
%
%
%
%
%
t m-3
A1
0–15
22.4
11.5
15
49
16
13
3.6
1.27
A2
15–40
N/R
N/R
12
55
17
13
0.7
N/R
B21
40–65
39.9
27.3
9
30
13
45
N/R
1.16
B22
65+
N/R
N/R
7
43
15
33
N/R
N/R

Management considerations
Texture contrast soil with a bleached A2 horizon indicates restricted drainage and poor soil structure. The presence of very sodic subsoils may result in poor soil structure and dispersion whilst the presence of mottles indicates periodic waterlogging. The application of gypsum may be used to counter the effect of sodicity, while improved drainage methods would reduce the waterlogging. Penetration by deep rooted crops is also useful as is minimum tillage which avoids bringing the sodic, dispersive material to the surface.
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