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SM03

Location: Cavendish

Australian Soil Classification: Vertic, Mottled-Subnatric, Brown SODOSOL

General Landscape Description: Gently Undulating Rises.
Site Description: Upper slope.
Land Use: Grazing.
Geology: Basalt.

Image: SM03 Landscape
SM03 Landscape - soil site is in the foreground.

Soil Profile Morphology:

Surface Soil

Image: SM03 Profile
SM03 profile
A10-12 cmDark brown (7.5YR3/2); firm surface condition; heavy loam; moderate medium polyhedral, parting to fine polyhedral structure; rough fabric; weak consistence moderately moist; many medium to fine roots present; pH 5.1; abrupt change to:

A212-25/40 cmDark greyish brown (10YR4/2), sporadic bleach; sandy clay loam; weak medium polyhedral, parting to fine polyhedral structure; rough fabric; weak consistence moderately moist; medium to fine roots common; pH 5.1; abrupt and wavy change to:
Subsoil

B2125/40-60 cmStrong brown (7.5YR5/8) with many prominant dark grey (7.5YR4/1) and black (7.5YR2.5/1) mottles; medium heavy clay; moderate medium polyhedral, parting to fine polyhedral structure; smooth fabric; very firm consistence moderately moist; very plastic; prominent organo-clay cutans common; few fine roots present; pH 6.5; gradual change to:
B2260-105 cmLight olive brown (2.5Y5/3) with many prominent dark brownish yellow (10YR6/6) and dark grey (10YR4/1) mottles; heavy clay; moderate medium polyhedral, parting to fine polyhedral structure; smooth fabric; very firm consistence moist; very plastic; prominent organo-clay cutans common; fine ferro-manganiferous concretions common; few fine and very fine roots present; pH 7.8; clear and wavy change to:

B23105-145 cmLight brownish grey (10YR6/2) with many distinct strong brown (7.5YR4/6) mottles; medium clay (sandy); moderate coarse lenticular, parting to medium to fine prismatic structure; smooth fabric; very firm consistence moderately moist; very plastic; very few ferro-manganiferous concretions; few distinct slickensides and organo-clay cutans; few fine and very fine roots present; pH 8.3; diffuse change to:

B24145 - 160+ cmPale brown (10YR6/3), with many faint reddish yellow (7.5YR6/6) mottles; medium heavy clay (sandy); moderate coarse lenticular, parting to medium to fine prismatic structure; smooth fabric; very firm consistence moderately moist; very plastic; very few soft calcareous segregations; prominent slickensides common with organo-clay cutans; few very fine roots present; pH 8.2.



Soil Profile Characteristics:


pH
Salinity Rating
Surface
(A1 horizon)
Strongly Acid
Very Low
Non-Sodic
None
Subsoil
(B21 horizon)
Slightly Acid
Very Low
Sodic
Slight
Deeper Subsoil
(at 105-145 cm)
Moderately Alkaline
Low
Strongly Sodic
Moderate1
1 Strong dispersion after remoulding.

Image: SM03 Graph
The surface soil is strongly acid. The upper subsoil is slightly acid becoming moderately alkaline with depth.The surface and upper subsoil have a very low salinity rating. The salinity rating in the deeper subsoil is low.
The surface soil is non-sodic. The upper subsoil is sodic becoming strongly sodic with depth.The MIR predicted clay levels are quite high in this profile.

Chemical and Physical Analysis:

Horizon
Horizon Depth
(cm)
pH
(water)
pH
(CaCl2)
EC
dS/m
Exchangeable
Acidity
meq/100g
Total Carbon
g/100g
Exchangeable Aluminium
mg/kg
Exchangeable Cations
Ca
Mg
K
Na
meq/100g
A1
0-12
5.0
4.1
0.07
10
2.1
76
2.6
1.0
0.06
0.29
A2
12-25/40
5.1
4.2
<0.05
1.7
0.7
0.05
0.20
B21
25/40-60
6.5
5.2
0.13
11
7.1
11
0.38
3.3
B22
60-105
7.8
6.5
0.32
5.5
12
0.52
6.2
B23
105-145
8.3
7.0
0.31
4.3
10
0.42
6.2
B24
145-160+
8.2
7.0
0.34
4.8
11
0.34
7.8

Horizon
Horizon Depth
(cm)
Field
Capacity
pF2.5

(MIR Predicted)
Wilting
Point
pF4.2

(MIR Predicted)
Coarse Sand
(0.2-2.0mm)

(MIR Predicted)
Fine Sand
(0.02-0.2mm)

(MIR Predicted)
Silt
(0.002-0.02mm)

(MIR Predicted)
Clay
(<0.002mm)

(MIR Predicted)
A1
0-12
22.3
13.9
20
29
11
19
A2
12-25/40
17.3
10.2
22
32
12
16
B21
25/40-60
42.1
27.9
5
14
6
69
B22
60-105
35.5
22.8
12
19
4
52
B23
105-145
38.7
26.1
6
18
11
60
B24
145-160+
44.3
27.4
6
19
11
60


Profile Described By: David Rees and Ivanah Oliver (September 2014).
CC BY 4.0 AU

This page contains material sourced from the Victorian Resources Online (VRO) website, originally published by the State Government of Victoria.

The content is provided under the Creative Commons Attribution 4.0 Australia licence (CC BY 4.0 AU).

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