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Site SW27

Location: Bostock Creek.Australian Soil Classification: Vertic (& Ferric), Subnatric, Grey SODOSOL.
General Landscape Description: Grazing paddock (dairy).Mapping Unit: Unit 113 (Maher and Martin, 1987).
Site Description: Lower slope within gently undulating hills.Geology: Quaternary - Newer volcanics (scoria).

Image: SW27 Landscape
Site SW27 Landscape


Soil Profile Morphology:

Surface Soil

A110-15 cm Black (10YR2/1); fine sandy clay loam; weak to moderate medium polyhedral, parting to moderate fine polyhedral structure; firm to very firm consistence (dry); weak-firm consistence (moist); pH 6.1; gradual change to:

Image: SW27 Profile
Site SW27 profile
A1215-40 cmVery dark grey (10YR3/1); fine sandy clay loam; moderate medium polyhedral, parting to moderate fine polyhedral structure; weak-firm consistence (moist); pH 5.8; abrupt change to:

A240-50 cmBrown (10YR5/3), conspicuously bleached (7.5YR7/2d); fine sandy clay loam; apedal; contains very many (> 50%) ferruginous nodules (2-6 mm in size); pH 6.5; sharp change to:
Subsoil

B2150-70 cmVery dark greyish brown becoming dark greyish brown (2.5Y4/2) with depth, with yellowish brown (10YR5/6) mottles; heavy clay; moderate very coarse prismatic, parting to moderate coarse to medium polyhedral structure; strong consistence (dry); pH 6.5; gradual change to:

B2270-100 cmGreyish brown (2.5Y5/2) with yellowish brown (10YR5/8) mottles; heavy clay; strong very coarse prismatic, parting to coarse prismatic and very coarse blocky structure; strong consistence (dry); many slickensides present; pH 7.0; abrupt change to:

C100+ cmWeathered ash.


Key Profile Features:
Key Profile Characteristics:


pH

Salinity Rating
Surface
(A1 horizon)
Slightly Acid
Low-Medium
Non-Sodic
Subsoil
(B21 horizon)
Slightly Acid
Low
Sodic
Deeper subsoil
(at 70-100 cm)
Neutral
Low
Sodic

Image: SW27 Graphs

Horizon
Horizon Depth
(cm)
pH
(water)
pH
CaCl2
EC
1:5
NaCl
%
Exchangeable Cations
Ca
Mg
K
Na
meq/100g
A11
0-15
6.1
5.7
0.29
0.02
14
2.3
0.6
0.1
A12
15-40
5.8
5
0.09
6.7
2.1
0.1
0.1
A2
40-50
6.5
5.6
0.08
4.5
2.2
<0.1
0.2
B21
50-70
6.5
5.8
0.18
5.8
9.6
0.2
1.4
B22
70-100
7
6.1
0.18
4.7
11
0.2
2.4
C
100+

Horizon
Horizon Depth
(cm)
Field
Capacity
pF2.5
Wilting Point
pF4.2
Coarse Sand
(0.2-2.0 mm)
Fine Sand
(0.02-0.2 mm)
Silt
(0.002-0.02 mm)
Clay
(<0.002 mm)
A11
0-15
39
18
6
39
22
19
A12
15-40
34
11
5
46
22
20
A2
40-50
26
11
29
33
15
19
B21
50-70
56
35
4
12
5
73
B22
70-100
26
32
3
14
8
72
C
100+

Profile Described By: Mark Imhof and Austin Brown, August 1988.
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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