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WCFA7

Location: Litchfield

Australian Soil Classification: Melanic-Sodic, Calcic, Brown DERMOSOL

Northcote Factual Key: Gn2.43

General Landscape Description: Flat Plain.
Site Description: Cultivated cropping paddock, gilgai microrelief.
Geology: Parna – Woorinen Formation.

Image: WCFA7 landscape
WCFA7 Landscape

Soil Profile Morphology:

Surface Soil
Image: WCFA7 Profile
WCFA7 Profile
A110-10 cmDark reddish brown (5YR3/2); heavy clay loam ; loose (cultivated) surface condition; contains very few fine rounded gravely fragments; pH 7.4; clear and wavy change to:
A1210-25 cmDark reddish brown (5YR2.5/2); heavy clay loam; pH 7.9; sharp and wavy change to:
Subsoil
B2125-55 cmDark brown (7.5YR4/3); light medium clay; contains very few medium ferromanganiferous nodules; very highly calcareous; pH 8.3; gradual and smooth change to:
B2255-70 cmBrown (7.5YR5/4); light medium clay; contains very few ferromanganiferous nodules, few soft calcareous segregations and very few fine calcareous nodules; very highly calcareous; pH 8.8; gradual and smooth change to:
B2370-100 cmReddish yellow (7.5YR6/6); contains very few ferro-manganiferous concretions, common coarse soft calcareous segregations, as well as few coarse calcareous nodules; very highly calcareous; pH 9.3.

Soil Profile Characteristics:


pH
Salinity Rating
Surface
(A1 horizon)
Slightly Alkaline
Low
Non-Sodic
Subsoil
(B21 horizon)
Moderately Alkaline
Low
Non-Sodic
Deeper Subsoil
(at 70-100 cm)
Very Strongly Alkaline
Low - Medium
Strongly Sodic


Image: WCFA7 graphs
The surface horizon is slightly alkaline. The upper subsoil is moderately alkaline becoming very strongly alkaline in the deeper subsoil.The salinity rating is low to medium throughout the profile.
The surface and upper subsoil is non-sodic. The deeper subsoil is strongly sodic.


Chemical Analysis:

Horizon
Horizon Depth
(cm)
pH
(water)
pH
(CaCl2)
EC
dS/m
NaCl
%
Exchangeable Cations
Ca
Mg
K
Na
meq/100g
A1
0-10
7.4
7.1
0.28
0.004
19
5.5
3
0.36
A2
10 - 25
7.9
7.5
0.23
-
30
5.3
1.9
0.39
B21
25 - 55
8.3
7.8
0.26
0.007
20
6.4
0.75
0.73
B22
55 -70
8.8
7.9
0.27
0.006
15
7.6
0.64
1.9
B23
70 -100+
9.3
8.2
0.44
0.029
8.3
8.9
0.7
4.3

Horizon
Horizon Depth
(cm)
Oxidisable Organic Carbon
%
Total
Nitrogen
%
Available
Boron
mg/kg
A1
0-10
1.8
0.13
-
A2
10 - 25
1.3
0.079
-
B21
25 - 55
0.65
<0.05
1.7
B22
55 -70
2.5
B23
70 -100+


Profile Described By: Nathan Robinson, Grant Boyle and John Martin (October 2006).
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