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CRC12

Location: Ararat

Australian Soil Classification: Bleached-Sodic, Magnesic, Yellow DERMOSOL

General Landscape Description: SE aspect, mid slope; hills – edge of colluvial "shoulder".
Site Description: Grazing paddock – runoff demonstration site.
Geology: Ordovician thinly bedded shale (micaceous).


Image: GH1-4 - Landscape
CRC12 Landscape

Soil Profile Morphology

Surface Soil
A10-10 cmDark brown (10YR3/3); light fine sandy clay loam; pH 5.0; clear change to:
Image: GH3 Profile
CRC12 Profile





A210-25 cmLight yellowish brown (10YR6/4); very fine sandy clay loam (with some Al horizon infill material); pH 5.5; clear change to:
Subsoil
B125-50 cmLight yellowish brown (10YR6/4) with brownish yellow (10YR6/8) mottles; heavy silty clay loam; moderate to strong very coarse prismatic, parting to moderate to strong medium polyhedral structure; very little gravel (2%); pH 6.1; gradual change to:
B21 50-80 cmBrownish yellow (10YR6/8) with reddish yellow (7.5YR6/6) mottles; light clay (silty); moderate to strong medium to fine polyhedral structure; extensive manganese staining (30-40%); pH 6.8:
B22 80-100 cmBrownish yellow (10YR6/8) with red (2.5YR5/8); light medium clay; pH 7.0:
B/C100-120 cmWeathering shale.

Note: Quartz gravel is variable in depth and amount between 30-80 cm depth


Image: GH3 side variation of profile
Side variation of soil profile. Note: Variation in quartz gravel distribution.


Key Profile Features


Key Profile Characteristics

pH
Salinity Rating
Surface
(A1 horizon)
Strongly Acid
Very Low
Non-Sodic
None
Subsoil
(B21c horizon)
Slightly Acid
Very Low
Marginally Sodic
None
Deeper subsoil
(at 80-100 cm)
Neutral
Very Low
Marginally Sodic
None

Image: GH3 graphs


Horizon
Horizon Depth
(cm)
pH
(water)
pH
(CaCl2)
EC
dS/m
Exchangeable Aluminium
ppm
Exchangeable Acididty
meq/100g
Exchangeable Cations
Coarse Sand
(0.2-2.0 mm)
%
Fine Sand
(0.02-0.2 mm)
%
Silt
(0.002-0.02 mm)
%
Clay
(<0.002 mm)
%
Ca
Mg
K
Na
meq/100g
A1
0-10
5
4.4
0.09
43
6.8
3.6
1.8
0.36
0.18
20
37
18
18
A2
10-25
5.5
4.6
<0.05
40
5.1
0.99
1.0
0.12
0.14
5
48
29
17
B1
25-50
6.1
5.1
<0.05
10
6.2
0.57
2.5
0.12
0.33
6
35
25
32
B21
50-80
6.8
6.1
0.10
3.1
0.29
6.6
0.24
0.83
13
17
24
45
B22
80-100
7
6.3
0.10
0.08
6.8
0.18
0.75
9
34
17
38

Profile Described By: Mark Imhof, Austin Brown and Malcolm McCaskill - November 2003
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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