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CSLP9

Location: Cooriemungle


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


General Landscape Description: Low Hills.
Site Description: Lower slope of a footslope.
Vegetation: Pasture.
Geology: Neogene Gellibrand Marl / Quaternary colluvium.


Image: CSLP7,8,9 Landscape
CSLP9 Landscape

Soil Profile Morphology:

Surface Soil

A10-10 cm Very dark brown (10YR2/2); loam; weak fine sub-angular blocky structure; rough fabric; very weak consistence moderately moist; many fine roots; pH 5.4; clear and wavy change to:


Image: CSLP9 Profile CSLP9 profile.
Subsoil

B110-35 cmGreyish brown (2.5Y5/2) with a common amount of fine faint yellowish brown (10YR5/8) mottles; light clay fine sandy; weak coarse sub-angular blocky and polyhedral structure; rough fabric; weak consistence moderately moist; occasional dark band deposits; many fine roots; pH 5.3; clear and wavy change to:

B2130-65 cmLight olive brown (2.5Y5/3) with a common amount of medium distinct yellowish brown (10YR5/6) mottles; medium clay; strong coarse angular blocky, parting to strong fine angular blocky structure; smooth fabric; weak consistence moderately moist; fine roots common; pH 5.1; clear and wavy change to:

B2265-90 cmLight grey (2.5Y7/1) with many medium distinct light yellowish brown (10YR6/4) and yellowish red (5YR5/8) mottles; medium heavy clay; weak medium prismatic structure; smooth fabric; firm consistence moist; slickensides evident; contains a few fine roots; pH 5.0; diffuse change to:


B2390-130 cmLight grey (2.5Y7/1) with many medium prominent light yellowish brown (2.5Y6/4) and yellowish red (5YR5/8) mottles; medium heavy clay; strong medium lenticular and prismatic, parting to fine polyheral structure; smooth fabric; firm consistence moist; slickensides evident; soft segregations evident; pH 5.1; gradual and wavy change to:

B24130-150+ cmLight grey (2.5Y7/1) with many coarse prominent yellowish red (5YR5/8) and light yellowish brown (2.5Y6/4) mottles; medium clay; strong medium lenticular, parting to moderate fine angular blocky structure; smooth fabric; firm consistence wet; soft segregations evident; pH 5.2.

Key Profile Features:

Large cracks in profile.

Soil Profile Characteristics:


pH


Salinity Rating
Surface
(A1 horizon)
Strongly Acid
Low
Non-Sodic
None
Subsoil
(B21 horizon)
Strongly Acid
Very Low
Non-Sodic
None
Deeper Subsoil
(at 90-130 cm)
Strongly Acid
Very Low
Sodic
None
NOTE: The B1 horizon has no dry aggregate dispersion but shows slight dispersion after remoulding.


Graph: CSLP9

    This profile is strongly acid throughout.
The salinity rating is low to very low throughout the soil profile.The profile is non-sodic becoming sodic at 1 metres depth.
    The clay content in the surface is low and slowly increases with depth becoming high in the deeper subsoil.
The exchangeable aluminium levels in the surface soil are low. Levels are high in the subsoil.

Horizon
Horizon Depth
(cm)
pH
(water)
pH
(CaCl2)
EC
(dS/m)
Exchangeable Cations
Ca
Mg
K
Na
meq/100g
A1
0-10
5.4
4.8
0.13
5.7
3.1
0.48
0.5
B1
10-35
5.3
4.4
<0.05
2.2
1.2
0.31
0.25
B21
35-65
5.1
4.1
<0.05
2.9
4.5
0.29
0.51
B22
65-90
5.0
4.2
0.08
3.9
7.0
0.2
0.89
B23
90-130
5.1
4.3
0.12
5.3
6.6
0.19
1.5
B24
130-150+
5.2
4.4
0.15
6.5
6.6
0.25
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)
A1
0-10
16
0.64
7.6
17
27.9
14.4
13
38
13
18
B1
10-35
8.1
0.14
2.3
98
26.7
7.3
7
49
13
25
B21
35-65
12
480
37.3
17.1
3
30
15
48
B22
65-90
400
42.4
20.0
2
24
12
58
B23
90-130
400
39.5
25.5
3
25.
15
55
B24
130-150+
130
37.3
18.7
4
30
15
51


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