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CSLP7

Location: Cooriemungle


Australian Soil Classification: Melacic, Pipey, Semiaquic, PODOSOL


General Landscape Description: Dissected Plateau.
Site Description: Very gently undulating plain.
Native Vegetation: Pasture, cattle.
Geology: Neogene sediments (Hanson Plain Sand) over Palaeogene sediments.

Image: CSLP7,8,9 Landscape
CSLP7 Landscape

Soil Profile Morphology:

Surface Soil

Ap0-5 cm Root mat;

Image: CSLP7 Profile
CSLP7 profile.
A115-15 cmVery dark brown (10YR2/2); light sandy clay loam; weak fine sub-angular blocky structure; rough fabric; weak consistence dry; pH 4.4; clear change to:

A1215-40 cmBlack (2.5Y2.5/1); sandy clay loam; massive; earthy fabric; firm consistence dry; pH 4.4; diffuse change to:
A1340-60 cmVery dark grey (10YR3/1); fine sandy clay loam; massive; earthy fabric; weak consistence dry; pH 4.6; sharp change to:
Subsoil

B21s60-150 cmWhite (10YR8/2) with faint strong brown (7.5YR5/8) and brown (10YR4/3) mottles common; clayey coarse sand; massive; earthy fabric; very strong consistence moist; contains very many coarse (6-20 mm in size) iron nodules; discontinuous ferruginous pan present; large organic infills; pH 5.7; gradual change to:
B22150-170 cmBlack (2.5Y2.5/1) with common amount of coarse light olive brown (2.5Y5/3) and brown (10YR4/3) mottles; fine sandy clay loam; weak coarse prismatic and polyhedral structure; rough fabric; weak consistence moist; contains common medium (2-6 mm in size) iron segregations; large organic infills; pH 4.7; clear change to:
B23s170-195 cmDark greyish brown (10YR4/2), with distinct very pale brown (10YR7/3) and dark yellowish brown (10YR4/4) mottles common; coarse sandy loam; weak coarse sub angular blocky structure; rough fabric; strong consistence moderately moist; contains a few fine gravelly quartz, and a common amount of coarse (6-20 mm in size) ferruginous nodules; discontinuous ferruginous pan present; large organic infills; pH 4.7; clear change to:

2B21/D195-200+ cmLight grey (10YR6/2), with prominent yellowish brown (10YR5/8) and very dark grey (2.5Y3/1) mottles common; light clay to light medium clay (very fine sandy); weak medium angular blocky, parting to moderate fine polyhedral structure; smooth fabric; weak consistence moist; pH 4.7.


Soil Profile Characteristics:


pH


Salinity Rating
Surface
(A11 horizon)
Extremely Acid
Very Low
Non-Sodic
None
Subsoil
(B21 horizon 60-150 cm)
Moderately Acid
Very Low
Non-Sodic
None
Very Deep Subsoil
(195-200 cm)
Very Strongly Acid
Very Low
Non-Sodic
None


Graph: CSLP7
    The surface is extremely acid. The subsoil is moderately acid and the very deep subsoil is very strongly acid.
The salinity rating is very low throughout the profile.Clay content is very low in the surface. The clay content increases in the very deep subsoil.
    Exchangeable aluminium varies throughout the profile from low in upper subsoil, to very high in the deeper subsoil.

Horizon
Horizon Depth
(cm)
pH
(water)
pH
(CaCl2)
EC
(dS/m)
Exchangeable Cations
Ca
Mg
K
Na
meq/100g
Ap
0-5
5.1
4.3
0.39
-
-
-
-
A11
5-15
4.4
3.5
0.06
2.1
0.49
0.17
0.16
A12
15-40
4.4
3.7
<0.05
0.36
0.09
<0.05
0.09
A13
40-60
4.6
4
<0.05
0.13
<0.05
<0.05
0.07
B21s
60-150
5.7
5.2
0.08
0.95
0.11
<0.05
0.08
B22
150-170
4.7
4.2
<0.05
0.06
0.10
<0.05
0.14
B23s
170-195
4.7
4.4
0.05
0.10
0.09
0.07
0.17
2B21/D
195-200
4.7
4.1
0.06
0.13
0.28
0.13
0.27

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)
Ap
0-5
-
1.3
21
<10
59.6
42.1
40
26
3
2
A11
5-15
20
0.31
7.7
110
29
13.3
36
35
8
5
A12
15-40
15
0.096
3.5
230
12.1
5.3
34
42
9
8
A13
40-60
-
2.4
190
21
5.3
36
42
9
9
B21s
60-150
8.9
-
33
23
7.2
31
40
11
15
B22
150-170
-
2.1
190
22.1
10.1
29
35
14
16
B23s
170-195
-
210
36
17.8
-
-
-
-
2B21/D
195-200
15
310
37.8
22.7
18
18
22
42


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