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SFS16

Location: PVI Hamilton


Australian Soil Classification: Haplic, Self-mulching, Black VERTOSOL
Northcote Factual Key: Ug 5.16
Great Soil Group: Possibly Wiesenboden.

Geology: Alluvium overlying Tertiary/ Quaternary basalt Newer Volcanics.
General Landscape Description: Drained swamp.
Soil Mapping Unit: Buckley Clay.
Site Description: Level plain (part of a former swamp).

Photo: Soil PVI 16 Landscape
Site SFS16 Landscape


Soil Profile Morphology:

Surface Soil

Ap0-20 cmVery dark grey (10YR3/1); heavy clay; strongly pedal; self mulching surface, polyhedral (2-20 mm) structure; clear change to:

Photo: Soil PVI 16 Profile
Site SFS16 Profile
Subsoil

B21t
20-60/70 cmVery dark grey (10YR3/1); heavy clay; strong coarse prismatic structure; slickensides at ped bases; clear change to:

B22ss60/70-100/110 cmGrey (5Y5/1) with common (20%) fine to medium yellowish brown (10YR5/6) mottles; heavy clay; prominent slickensides becoming larger (>30 cm) at depth; gradual change to:

B23ss110+ cmPale olive (5Y6/4) with common fine yellowish brown (10YR5/6) mottles; heavy clay; prominent slickensides.

Photo: PVI 16 Subsoil Ped
Subsoil Ped

Key Profile Features:
  • Clay texture throughout soil profile
  • Significant cracking when profile is dry.
  • Prominent slickensides in subsoil.
Soil Profile Characteristics:


pH
Salinity Rating
Surface
(A1 horizon)
Strongly Acid
Low
Non Sodic
None
Subsoil
(B21 horizon)
Moderately Acid
Low
Non Sodic
None 1
Deeper Subsoil
(at 130+ cm)
Slightly Alkaline
Low
Sodic
None 1
1 Moderate dispersion after remoulding.

Graph: pH in SFS 16
Graph: Salinity in SFS 16
Graph: Sodicity in SFS 16
Graph: Clay% in SFS 16

Horizon
Horizon Depth
(cm)
pH
(water)
pH
(CaCl2)
EC 1:5
NaCI
%
Exchangeable Cations
Ca
Mg
K
Na
meq/100g
Ap
0-10
6.0
5.3
0.23
16
18
0.68
1.5
B21
10-50
6.6
5.6
0.16
15
21
0.84
2.2
B22
50-90
7.5
6.8
0.41
0.07
15
26
0.7
4.4
B23
90-130
7.6
7.1
0.81
0.14
13
25
0.9
4.8


Horizon
Horizon
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)
Ap
0-10
11
21
56
36
2
10
14
63
B21
10-50
16
59
33
1
9
18
67
B22
50-90
58
40
1
8
12
75
B23
90-130


1
7
10
74


Management Considerations:

Whole Profile
Profile Described By: Richard MacEwan, 7 December 1999.
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