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CRC13

Location: Ararat

Australian Soil Classification: Bleached-Mottled, Eutrophic, Yellow DERMOSOL

General Landscape Description: Mid-slope of hill (SE aspect) with colluvial deposits.
Site Description: Grazing paddock – runoff demonstration site.
Geology: Ordovician thinly bedded shale (micaceous).

Image: GH1-4 - Landscape
CRC13 Landscape

Soil Profile Morphology

Surface Soil

A1
0-10 cm
Dark brown (10YR3/3); fine sandy clay loam; pH 4.8; clear change to:
Image: GH4 profile
CRC13 profile





A210-20 cmLight yellowish brown (10YR6/4); very fine sandy clay loam; pH 5.7; clear change to:
Subsoil
B120-35 cmBrownish yellow (10YR6/6); heavy clay loam (very fine sandy); pH 6.0; clear change to:
B21 35-60 cmBrownish yellow and light yellowish brown (10YR6/6 & 6/4) with dark red (2.5YR4/8) mottles; light medium clay, strong medium-fine polyhedral structure; pH 6.4; irregular change to:
B22 60-80 cm Strong brown (7.5YR5/6) with brownish yellow (10YR6/6) and red (2.5YR5/8) mottles; medium clay, strong medium-fine polyhedral structure; pH 6.6:
B/C80-110 cmMedium clay, (manganese staining (manganese) common (10-20%); pH 7.0.

Image: GH4 - bottom detail of profile
Bottom detail of soil profile
GH4 Mangan
Mangan detail




Key Profile Characteristics

pH
Salinity Rating
Surface
(A1 horizon)
Very Strongly Acid
Very Low
Non-Sodic
-
Subsoil
(B21c horizon)
Slightly Acid
Very Low
Non-Sodic
-
Deeper subsoil
(at 80-110 cm)
Neutral
Very Low
-
-
Image: GH4 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
4.8
4.3
0.11
49
13
4.8
2.1
0.81
0.21
9
30
23
22
A2
10-20
5.7
4.9
<0.05
18
7.2
2.3
2.2
0.17
0.14
4
41
32
20
B1
20-35
6
5.2
<0.05
10
6.1
1.4
4.1
0.17
0.17
4
34
31
29
B21
35-60
6.4
5.7
<0.05
<10
7.8
1.4
7.5
0.22
0.26
3
20
31
45
B22
60-80
6.6
6.9
<0.05
3
19
31
48
B/C
80-110
7
6.2
<0.05



Management Considerations:
  • The deep subsoil has manganese staining (10-20%) evident. This may have some toxic effect on plant roots (unknown).

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