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MM5017

Site code
      MM5017
Location
      Moorabool (Staceys Road), Anakie district, south-west Victoria
Landform
      Undulating basalt rises
Geology
      Quaternary Newer Volcanics: extrusive tholeiitic to alkaline basalts, minor scoria and ash
Element
      Crest

Profile morphology
Horizon

Depth (cm)

Description

A1
0–25
Very dark greyish brown (10YR3/2); medium clay; strong coarse blocky structure; strong consistence (dry); gradual boundary to:
B21
25–N/R
Dark greyish brown (10YR4/2); medium clay; strong coarse blocky structure; strong consistence (dry); boundary to:
B22
N/R–65
Medium clay; strong fine blocky structure; firm consistence (moderately moist); sharp boundary to:
B23
65–75
Red (2.5YR5/6); medium clay; strong fine blocky structure; firm consistence (moderately moist); sharp boundary to:
B24
75+
Greyish brown (10YR5/2); medium clay; strong fine blocky structure; firm consistence (moderately moist); common calcareous segregations.

ASC: Episodic-Endocalcareous, Epipedal, Grey Vertosol

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

Site MM5017
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
0–25
7.7
N/R
0.17
0.04
3.5
3.5
0.7
3
0
5.7
B21
25–N/R
8.7
N/R
0.64
0.15
5.3
5.3
1.2
10.9
0
0
B22
N/R–65
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
B23
65–75
9
N/R
1.26
0.26
6.4
6.4
1.6
15.8
N/R
0
B24
75+
9.1
N/R
1.36
0.28
6.4
6.4
1.5
16.6
N/R
0

Site MM5017
Sample
depth
FC
(-10kPa)
PWP
(-1500kPa)
KS
FS
Z
C
Org C
Bulk density
Horizon
cm
%
%
%
%
%
%
%
t m-3
A1
0–25
23.1
14.5
23
30
16
30
1.4
1.25
B21
25–N/R
50.6
37.2
15
16
9
57
N/R
1.24
B22
N/R–65
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
B23
65–75
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
B24
75+
N/R
N/R
7
12
14
66
N/R
N/R

Management considerations
These soils are uniform cracking clay soils with hardsetting topsoils grading to alkaline and highly sodic subsoils and calcareous segregations present at depth. These subsoils usually have poor structure and results in dispersion (and subsequent clogging of pores), restricting water and gas movement through the subsoil.

Improvement of soil structure through increased organic matter would be useful, and addition of gypsum where sodic would be beneficial. Bringing this material to the surface is likely to contribute to surface sealing and increase erosion susceptibility.
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