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Site SW46

Location: CooriemungleAustralian Soil Classification: Bleached-Vertic (& Acidic-Mottled), Eutrophic, Grey DERMOSOL/Calcic Clay
General Landscape Description: Gently undulating rises.Mapping Unit: Unmapped.
Site Description: Grazing paddock (dairy).Geology: Tertiary - Gellibrand Marl.

Image:  SW46 Landscape
Site SW46 Landscape


Soil Profile Morphology:

Surface Soil

A10-15 cmVery dark brown (10YR3/2); very fine sandy clay loam; moderate medium blocky, parting to moderate to strong fine polyhedral structure; firm consistence moist; pH 5.8; clear change to:

    Image:  SW46 Profile
    Site SW46 profile
A215-30 cmBrown (10YR5/3), conspicuously bleached (10YR7/1d); rusty root channel mottling; heavy silty clay loam; weak coarse blocky structure; firm consistence moist; pH 5.5; clear change to:

Subsoil

B2130-50 cmGrey (10YR5/1); silty clay; strong coarse blocky, parting to strong medium and fine blocky structure; firm consistence moist; pH 5.5; clear change to:

B2250-80 cmGrey (10YR6/1) with many brownish yellow (10YR6/6) mottles; medium clay; strong lenticular structure; many slickensides; pH 5.5; gradual change to:

B2380-100 cmGrey (10YR6/1) with many brownish yellow (10YR6/6) mottles; light medium clay; strong lenticular structure; many slickensides; pH 5.9; gradual change to:

B24100-110 cmGrey (10YR6/1) with many brownish yellow (10YR6/6) mottles; light medium clay; pH 6.3; clear change to:

B3k110+ cmBrownish yellow (10YR6/6); light clay; contains calcareous nodules; pH 8.5.

Key Profile Features:


Key Profile Characteristics:

pH
Salinity Rating
Surface
(A1 horizon)
Moderately Acid
Very Low
Non-Sodic
None
Subsoil
(B21 horizon)
Strongly Acid
Very Low
Non-Sodic
None
Deeper subsoil
(at 1 m)
Moderately Acid
Very Low
Non-Sodic
None


Image:  SW46 pH
Image:  SW46 Salinity
Image:  SW46 Clay
The surface is moderately acid. The upper subsoil is strongly acid becoming moderately acid at 80 cm.
The salinity rating throughout the profile is very low.
The clay content gradually increases with depth, down this profile.

Horizon
Horizon Depth
(cm)
pH
(water)
pH
CaCl2
EC
1:5
NaCl
%
Exchangeable Cations
Ca
Mg
K
Na
meq/100g
A1
0-15
5.8
5
0.09
7.5
2
0.3
0.1
A2
15-30
5.5
4.6
0.06
2.7
1.6
0.2
0.1
B21
30-50
5.5
4.4
0.06
4
3.4
0.3
0.3
B22
50-80
5.5
4.5
0.1
7.1
5.5
0.2
0.7
B23
80-100
5.9
4.9
0.14
9.3
6.6
0.1
1.3
B24
100-110
6.3
5.4
0.22
12
7.6
0.1
1.8
B3k
110+
8.5
7.8
0.33
0.02
16
7.3
0.2
2.4

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)
A1
0-15
40
20
2
31
33
26
A2
15-30
29
10
1
27
30
39
B21
30-50
33
17
1
37
38
23
B22
50-80
44
24
1
16
20
61
B23
80-100
46
24
1
13
19
65
B24
100-110
46
25
1
13
19
64
B3k
110+
44
25
2
22
15
45


Profile Described By: Mark Imhof and Austin Brown, August 1998.
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