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SW33

Location: Kawarren

Australian Soil Classification: Acidic, Dermosolic, Redoxic HYDROSOL

Map Unit: Map Unit 147 (Maher and Martin, 1987).

General Landscape Description: Level plain.
Site Description: Grazing paddock (dairy).
Geology: Quaternary sediments overlying Tertiary - Dilwyn Formation.

Sw33 Landscape
SW33 Landscape


Soil Profile Morphology:

Surface Soil

A10-20 cmGreyish brown (10YR3/2); rusty root channel mottling present; very fine sandy clay loam; weak coarse blocky, parting to moderate medium blocky structure; weak consistence moist; pH 5.1:
Sw33 Profile
SW33 Profile
Subsoil
B2120-45 cmBrown (10YR5/3) with yellowish brown (10YR5/8) mottles; light clay; moderate medium polyhedral structure; weak consistence moist; pH 4.9:
B2245-100 cmGrey (10YR5/1) with yellowish brown (10YR5/6) mottles; medium clay; strong medium polyhedral, parting to strong fine polyhedral structure; weak consistence moist; pH 4.7.

Key Profile Features:
  • The soil profile will be saturated for a number of months in most years.

Soil Profile Characteristics:



pH



Salinity Rating
Surface
(A1 horizon)
Strongly Acid
Low
Non-Sodic
None
Subsoil
(B21 horizon)
Very Strongly Acid
Low
Non-Sodic
None
Deeper subsoil
(at 1 m)
Very Strongly Acid
Very Low
Non-Sodic
None

Sw33 pH
The surface horizon is strongly acid. The subsoil is very strongly acid.		Sw33 Salinity
The whole profile has a low to very low salinity rating. 		Sw33 Clay
The clay content gradually increases with depth.

Horizon
Horizon Depth
(cm)
pH
(water)
pH
(CaCl2)
EC
(dS/m)
Exchangeable Cations
Ca
Mg
K
Na
meq/100g
A1
0-20
5.1
4.4
0.13
3.9
0.9
0.2
0.05
B21
20-45
4.9
4.2
0.12
2.5
1.6
0.2
0.05
B22
45-80
4.7
4
0.16
1.6
3.3
0.3
0.2
B23
80-100
4.7
3.9
0.13
1.2
3.7
0.2
0.2
Horizon
Horizon Depth
(cm)
Acidity
meq/100g
Oxidisable Organic Carbon
%
Total
Nitrogen
%
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
0-20
3.2
0.23
28.7
11.2
9
50
14
24
B21
20-45
12
29.2
13.6
10
41
10
38
B22
45-80
38.8
21.2
7
26
7
57
B23
80-100
8
27
8
54

Profile Described By: Mark Imhof and Austin Brown (June, 1998).
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