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Site SW51

Location: Cooriemungle.Australian Soil Classification: Bleached-Acidic, Dystrophic, Grey DERMOSOL.
General Landscape Description: Gently Undulating Rises.Mapping Unit: Unmapped.
Site Description: Grazing paddock (dairy).Geology: Tertiary – Moorabool Viaduct Formation.

Image:  SW51 Landscape
Site SW51 Landscape


Soil Profile Morphology:

Surface Soil

A10-15 cmBlack (10YR2/1); fine sandy loam; weakly structured; weak consistence moist; contains very few (2%) quartz nodules (2-5 mm in size); pH 5.3; clear change to:

    Image:  SW51 Landscape
    Site SW51 profile
A215-25 cmPale brown (10YR6/3), conspicuously bleached; very fine sandy clay loam; weakly structured; weak consistence moist; contains very few (2%) quartz nodules (2-5 mm in size); pH 5.2; clear change to:

Subsoil

B2125-60 cmPale brown (10YR6/3) with many brownish yellow (10YR6/6) and yellowish brown (10YR5/8) mottles; light clay; moderate coarse blocky, parting to strong medium blocky structure; weak consistence moist; pH 5.5; gradual change to:

B2260-80 cmLight brownish grey (10YR6/2) with many yellowish brown (10YR5/8) mottles; light clay; strong medium blocky structure; weak consistence moist; pH 5.1; gradual change to:

B2380-110 cmGrey (10YR6/1) with many yellowish brown (10YR5/8) mottles; light clay; strong coarse blocky, parting to medium blocky and strong fine polyhedral structure; shiny peds; firm consistence moist; pH 5.3.

Key Profile Features:


Key Profile Characteristics:

pH
Salinity Rating
Surface
(A1 horizon)
Strongly Acid
Very Low
Non-Sodic
None
Subsoil
(B21 horizon)
Strongly Acid
Very Low
Non-Sodic
Slight1
Deeper subsoil
(at 1 m)
Strongly Acid
Very Low
Non-Sodic
None
1. Complete dispersion after remoulding.
Image:  SW51 pH
Image:  SW51 Salinity
Image:  SW51 Clay
This profile is strongly acid throughout.
This profile has a very low salinity rating throughout.
The clay content increases gradually with depth.

Horizon
Horizon Depth
(cm)
pH
(water)
pH
CaCl2
EC
1:5
Exchangeable Cations
Ca
Mg
K
Na
meq/100g
A1
0-15
5.3
4.4
0.07
6.1
1
0.1
0.05
A2
15-25
5.2
4.1
0.06
1.6
0.5
<0.1
0.2
B21
25-60
5.5
4.2
0.07
1
0.6
<0.1
0.4
B22
60-80
5.1
4.1
0.09
0.9
1.6
0.1
0.4
B23
80-110
5.3
4.2
0.08
0.7
2.8
,0.1
0.4

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
43
17
3
35
31
18
A2
15-25
31
10
1
40
5
22
B21
25-60
30
14
1
34
34
31
B22
60-80
41
23
1
19
18
59
B23
80-110
45
23
1
15
21
58


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