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SM01

Location: Buckley Swamp

Australian Soil Classification: Melacic-Mottled (& Vertic), Eutrophic, Brown CHROMOSOL

General Landscape Description: Undulating lava plain adjacent to Buckley Swamp.
Site Description: Mid slope.
Land Use: Grazing.
Geology: Basalt.


Image: SM01 Landscape
SM01 Landscape - pit in the foreground.

Soil Profile Morphology:

Surface Soil

Image: SM01 Profile
SM01 profile
A110-13 cmVery dark greyish brown (10YR3/2); firm surface condition; light clay loam (fine sandy); strong medium polyhedral, parting to very fine polyhedral structure; rough fabric; weak consistence moderately moist; many fine roots present; pH 5.1; clear change to:

A1213-30 cmVery dark greyish brown (10YR3/2); clay loam; moderate medium polyhedral, parting to very fine polyhedral structure; rough fabric; very weak consistence moist; contains very few ferro-manganiferous nodules; many fine roots present; pH 5.1; clear change to:

A230-55 cmBrown (7.5YR4/3); clay loam; weak coarse polyhedral, parting to fine polyhedral structure; rough fabric; weak consistence moderately moist; gravelly ferro-manganiferous nodules abundant; fine roots common; pH 6.1; clear change to:

Subsoil

B2155-80 cmYellowish brown (10YR5/4) with faint dark red (2.5YR4/8) mottles common; medium clay; moderate medium prismatic, parting to very fine polyhedral structure; smooth fabric; weak consistence moist; gravelly ferro-manganiferous nodules common; very fine roots common; pH 6.6; diffuse change to:

B2280-130 cmDark yellowish brown (10YR4/6) with many coarse distinct dark yellowish brown (10YR4/4) and dark red (2.5YR4/8) mottles; medium clay; moderate coarse lenticular, parting to fine angular blocky structure; smooth fabric; weak consistence moist; faint slickensides common with few distinct organo-clay cutans evident; very few very fine roots present; pH 6.4; clear change to:

BC130-150+ cmGreyish brown (10YR5/2) with many very coarse prominent dark red (2.5YR4/6) and light grey (5Y7/1) mottles; medium heavy clay; moderate coarse lenticular, parting to moderate angular blocky structure; smooth fabric; firm consistence moist; many distinct slickensides evident; contains few very weathered basalt fragments; very few very fine roots present; pH 6.6.


Soil Profile Characteristics:


pH
Salinity Rating
Surface
(A1 horizon)
Strongly Acid
Very Low
Non Sodic
None
Subsoil
(B21 horizon)
Slightly Acid
Very Low
Non Sodic
None
Deeper Subsoil
(at 80-130+ cm)
Slightly Acid
Very Low
Sodic
None

Image: SM01 Graph

The surface soil is strongly acid. The subsoil is slightly acid.The salinity rating is very low throughout the profile.
The surface and the upper subsoil are non-sodic. The deeper subsoil is sodic.The MIR predicted clay content increases markedly at the A / B boundary.
Chemical and Physical Analysis:

Horizon
Horizon Depth
(cm)
pH
(water)
pH
(CaCl2)
EC
dS/m
Total Carbon
g/100g

Exchangeable Aluminium
mg/kg
Exchangeable
Acidity
meq/100g
Exchangeable Cations
Ca
Mg
K
Na
meq/100g
A11
0 – 13
5.1
4.3
0.09
4.2
64
15
3.4
1.3
0.22
0.26
A12
13 - 30
5.1
4.2
0.05
2.6
0.9
0.15
0.16
A2
30 -55
6.1
5.2
0.05
2.9
1.3
0.08
0.22
B21
55 - 80
6.6
5.7
0.10
11
4.6
5.9
0.14
0.98
B22
80 - 130
6.4
5.8
0.13
4.3
7.7
0.15
1.4
B23
130 - 150+
6.6
5.8
0.14
9.9
4.4
11
0.11
2.1

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)
A11
0 – 13
28.9
12.0
11
34
22
20
A12
13 - 30
25.6
12.4
9
31
24
23
A2
30 -55
23.8
12.4
11
32
19
25
B21
55 - 80
37.3
23.6
7
16
12
60
B22
80 - 130
48.6
33.8
3
6
11
87
B23
130 - 150+
50.5
36.2
3
6
14
87


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).

This material is presented in an archived form and is no longer maintained or updated. It is provided for general information only and should not be relied upon as current advice.

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