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MM232

Site code
      MM232
Location
      Cobden (Cobden Warrnambool Road), Cobden district, south-west Victoria
Landform
      Gently undulating basalt plains
Geology
      Quaternary Newer Volcanics: extrusive tholeiitic to alkaline basalts, minor scoria and ash
Element
      Flat

Profile morphology
Horizon

Depth (cm)

Description

A1
0–30
Dark brown (10YR3/3); clay loam; very weak consistence (moist); boundary to:

A2
30–50
Light yellowish brown (10YR6/4), conspicuously bleached, very pale brown (10YR7/3 dry); clay loam; weak consistence (moist); sharp boundary to:

B21
50–90
Dark yellowish brown (10YR4/4) with yellowish brown (10YR5/8) mottles; medium clay; moderate medium blocky structure; very many fine segregations; clear boundary to:

B22
90+
Yellowish brown (10YR5/6) with red (2.5YR4/6) mottles; medium clay; strong medium blocky structure.

ASC: Bleached-Ferric, Eutrophic, Brown Chromosol

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

Site MM232
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
0–30
5.8
N/R
0.08
N/R
2.3
2.3
0.2
0.5
N/R
17.7
A2
30–50
5.9
N/R
0.04
N/R
1.7
1.7
0
0.3
N/R
10.2
B21
50–90
5.8
N/R
0.1
N/R
4.6
4.6
0.3
1.2
N/R
15.2
B22
90+
5.8
N/R
0.1
N/R
4
4
0.3
1.6
N/R
15

Site MM232
Sample
depth
FC
(-10kPa)
PWP
(-1500kPa)
KS
FS
Z
C
Org C
Bulk density
Horizon
cm
%
%
%
%
%
%
%
t m-3
A1
0–30
34.6
19
4
42
28
19
4
1.07
A2
30–50
26.7
10.2
7
38
29
23
N/R
N/R
B21
50–90
53.2
41
3
7
5
83
N/R
1.06
B22
90+
N/R
N/R
1
10
9
79
N/R
N/R

Management considerations
The surface soil is hardsetting with a strong texture contrast between the surface soil and the subsoil which may impact upon subsoil permeability. Mottled subsoils are other prominent features of this soil type.

The application of gypsum would be suitable for soil structure and improved permeability, while increasing organic matter and maintaining vegetative cover is important to help improve the soil structure. Penetration by deep-rooted crops is also useful.
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