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MM115

Site code
      MM115
Location
      Wingeel (Winchelsea Cressy Road), Cressy district, south-west Victoria
Landform
      Lava plain
Geology
      Quaternary Newer Volcanics: extrusive tholeiitic to alkaline basalts, minor scoria and ash
Element
      Upper slope

Profile morphology
Horizon

Depth (cm)

Description

A1
0–15
Dark brown (10YR3/3); fine sandy clay loam; apedal massive structure; firm consistence (dry); clear boundary to:

A2
15–20
Sporadically bleached, light grey (10YR7/2 dry); light sandy clay loam; apedal massive structure; firm consistence (dry); common fine to coarse segregations; sharp boundary to:

B21
20–60
Very dark greyish brown (10YR3/2 moist) with grey (10YR4/6) mottles; heavy clay; strong coarse blocky structure; strong consistence (dry); gradual boundary to:

B22
60–80
Dark greyish brown (10YR4/2); heavy clay; strong coarse blocky structure; firm consistence (moderately moist); gradual boundary to:

B23
80+
Light yellowish brown (2.5Y6/4); medium clay; moderate fine blocky structure; firm consistence (moderately moist); common calcareous soft segregations.


ASC: Hypercalcic; Mottled-Hypernatric; Black Sodosol

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

Site MM115
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
6.1
N/R
0.09
N/R
2.5
2.5
0.2
0.6
0
7.6
A2
15–20
6.6
N/R
0.1
N/R
2.2
2.2
0.2
0.8
0
7
B21
20–60
8
N/R
0.35
0.06
4.2
4.2
1.2
7.5
N/R
0
B22
60–80
8.8
N/R
0.52
0.09
3.9
3.9
1.1
9.2
N/R
0
B23
80+
9.4
N/R
0.74
0.09
4.6
4.6
1
9.2
N/R
0

Site MM115
Sample
depth
FC
(-10kPa)
PWP
(-1500kPa)
KS
FS
Z
C
Org C
Bulk density
Horizon
cm
%
%
%
%
%
%
%
t m-3
A1
0–15
20.5
11.9
28
40
11
16
2.3
1.4
A2
15–20
N/R
N/R
27
42
13
16
1.6
N/R
B21
20–60
48.4
37.7
12
21
7
57
N/R
1.36
B22
60–80
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
B23
80+
N/R
N/R
15
23
9
45
N/R
N/R

Management considerations
This soil exhibits a strong texture contrast between the surface soil and the subsoil, hardsetting surfaces, bleached A2 horizons and Ferruginous and Ferromanganiferous nodules. The subsoil also features sodic, mottled and alkaline subsoils with calcium carbonate nodules.

These features are an indication of periodic waterlogging, restricted drainage, poor soil structure (often massive) and low organic matter, nutrient and water holding capacity and may be improved with the application of gypsum, increasing organic matter and improved drainage.
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