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CSLP8

Location: Cooriemungle


Australian Soil Classification: Vertic (& Acidic), Eutrophic, Brown DERMOSOL

General Landscape Description: Low hill (hillock) on a valley side (slumped material).
Site Description: Lower mid slope of an undulating hillslope.
Vegetation: Pasture.
Geology: Gellibrand Marl - Palaeogene sediments.

Image: CSLP7,8,9 Landscape
CSLP8 Landscape


Soil Profile Morphology:

Surface Soil

A110-10 cm Very dark greyish brown (2.5Y3/2); fine sandy loam; weak fine sub-angular blocky parting to weak very fine sub-angular blocky structure; weak consistence moderately moist; pH 5.3; clear and wavy change to:

Image: CSLP8 Profile CSLP8 profile.
A1210-20 cmDark greyish brown (2.5Y4/2) with a few fine distinct dark red (2.5YR3/6) mottles; clay loam, fine sandy; weak medium polyhedral parting to weak fine polyhedral structure; weak consistence moist; minor charcoal evident; pH 5.3; gradual and wavy change to:

Subsoil

B120-30 cmLight greyish brown (2.5Y6/2) with a common amount of fine distinct strong brown (7.5YR5/8) and dark red (2.5YR3/6) mottles; light clay; weak medium polyhedral, parting to weak fine polyhedral structure; firm consistence moist; pH 5.4; abrupt and wavy change to:

B2130-60 cmLight olive brown (2.5Y5/3) with a few medium distinct yellowish brown (10YR5/6) mottles; light medium clay; strong coarse prismatic, parting to strong fine angular blocky structure; weak consistence moist; pH 5.1; gradual and wavy change to:

B2260-90 cmLight greyish brown (2.5Y6/2) with many coarse prominent brownish yellow (10YR6/8) mottles; medium clay; strong coarse lenticular, parting to moderate fine polyhedral and lenticular structure; slickensides common; contains soft segregations; pH 5.1; smooth and diffuse change to:

B2390-130 cmLight grey (2.5Y7/1) with many medium prominent reddish yellow (7.5YR6/8) mottles; medium heavy clay; moderate very coarse lenticular structure; slickensides common; contains soft segregations; pH 4.8; smooth and diffuse change to:

B24130-145+ cmLight grey (2.5Y7/1) with many fine prominent strong brown (7.5YR5/8) mottles; medium heavy clay; many slickensides evident; contains soft segregations; pH 4.9.

Key Profile Features:

Large crack from the surface running to 70 cm into the subsoil.

Soil Profile Characteristics:


pH


Salinity Rating
Surface (A11 horizon)
Surface (A12 horizon)
Strongly Acid
Very Low
Non-Sodic
None

None 1

Upper Subsoil
(B21 horizon)
Strongly Acid
Very Low
Non-Sodic
None
Deeper Subsoil
(at 90-130 cm)
Very Strongly Acid
Very Low
Sodic
None
1 Slight to moderate dispersion after remoulding.

Graph: CSLP8
The surface horizon and the upper subsoil is strongly acid. The deeper subsoil is very strongly acid. The salinity rating is very low throughout the profile.The clay content is low in the surface and gradually increases with depth.
    The exchangeable aluminium levels in the surface are low. Levels are high throughout the subsoil.

Horizon
Horizon Depth
(cm)
pH
(water)
pH
(CaCl2)
EC
(dS/m)
Exchangeable Cations
Ca
Mg
K
Na
meq/100g
A11
0-10
5.3
4.6
0.08
4.1
2.2
0.39
0.50
A12
10-20
5.3
4.4
0.05
2.9
2.1
0.31
0.37
B1
20-30
5.4
4.4
<0.05
2.4
2.4
0.34
0.33
B21
30-60
5.1
4.1
0.06
1.8
3.5
0.36
0.46
B22
60-90
5.1
4.2
0.1
1.6
4.8
0.25
0.79
B23
90-130
4.8
4.1
0.12
2.5
5.6
0.19
1.5
B24
130-145+
4.9
4.1
0.15
3.4
5.8
0.17
2.0

Horizon
Horizon Depth
(cm)
Exchangeable
Acidity
meq/100g
Total
Nitrogen
%

Organic Carbon
g/100g
Exchangeable
Aluminium
mg/kg

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
0-10
17
0.51
6.8
91
36.1
14.4
10
46
20
8
A12
10-20
-
0.11
2.0
120
30.2
10.5
3
50
22
17
B1
20-30
8.5
1.0
160
29.1
10.5
2
53
21
18
B21
30-60
10
420
33.9
14.1
2
42
20
32
B22
60-90
380
33.8
16.8
2
39
14
42
B23
90-130
450
37.7
19.8
1
32
13
49
B24
130-145+
350
40.8
21.8
1
30
14
52


Profile Described By
: David Rees, Nathan Robinson (March 2009).
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