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SW96

Location: Batesford

Australian Soil Classification: Vertic (& Sodic), Hypercalcic, Black DERMOSOL

General Landscape Description: Undulating rises.
Site Description: Upper slope adjacent to open depression.
Geology: Basalt.


Image: SW96 Landscape
SW96 Landscape

NOTE: This profile was described as part of a catena transecting a small open depression in the basalt which has intersected the underlay sedimentary (Moorabool Viaduct) material.

See also SW97, SW98, SW99, SW100.


Soil Profile Morphology:

Surface Soil


Ap0-15 cmGreyish brown (10YR5/2 moist); hardsetting surface condition; loam; pH 5.6; gradual change to:
South West Gasp Pipeline SW96 Profile
SW96 Profile - Note: Surface stripped from soil profile.
Subsoil
B21tg15-40/70 cmVery dark grey (10YR3/1 moist) to greyish brown (2.5Y5/2 moist); fine to medium yellowish brown (10YR5/8 moist) mottles in centre of peds; mottles increase with depth; light clay; medium angular blocky structure; some slickensides (<100 mm); pH 8.1:
B22k/R 40/70-200+ cmCalcareous clay and rock matrix; basalt ranging from massive fractured to rubbly (colluvial).

Key Profile Features:
  • Calcareous clay and rock matrix in B horizon.

Soil Profile Characteristics:

pH
Salinity Rating
Surface
(A1 horizon)
Moderately Acid
Low
Non-Sodic
None1
Subsoil
(B21 horizon)
Moderately Alkaline
Low
Sodic
None2
1 Moderate dispersion after remoulding.
2 Strong dispersion after remoulding.


Image: SW96 Graphs

The surface is moderately acid. The subsoil is moderately alkaline.Salinity rating is low throughout the profile.The soil is non sodic in the surface and sodic in the subsoil.The clay content increases markedly at the A/B boundary.

Horizon
Sample Depth
(cm)
pH
(water)
pH
(CaCl2)
EC
1:5
Nitrogen
%
Organic Carbon
%
Exchangeable Cations
Ca
Mg
K
Na
meq/100g
A
0-15
5.6
4.9
0.15
0.3
3.2
5.8
5
1.1
0.59
B21tg
25-40
8.1
7.1
0.14
12
12
0.74
1.8
Horizon
Sample Depth
(cm)
Exchangeable Aluminium
mg/kg
Exchangeable Acidity
meq/100g
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)
A
0-15
<10
12
22.8
12.4
21
37
11
28
B21tg
25-40
40
21.3
16
27
9
42


Profile Described By: Richard McEwan (February 1999).
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