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WIA31

    Site Code
 WIA31

    Location

Vectis South, western Victoria

    Landform

Dunefield

    Geology

Quaternary Lowan Formation: aeolian fine to medium grained dune sand

    Element

Swale
Horizon
Depth (cm)
Description

A1

0–20

Dark brown (10YR3/3); sandy loam; hard setting surface condition; weak granular structure; firm consistence dry; pH 6.6; sharp boundary to:

B1

20–35

Brownish yellow (10YR6/6) sporadically bleached (2.5Y7/4d); light medium clay; subplastic; massive structure with cemented capping; very strong consistence dry; pH 7.4; gradual boundary to:

B21

35–80

Brownish yellow (10YR6/6); light medium clay; subplastic; weak blocky structure; strong consistence dry; slightly sticky consistence wet; very few (<2%) calcareous soft segregations; pH 8.5; gradual boundary to:

B22

80–100

Yellow (10YR7/6) with (5YR5/6) mottles; medium heavy clay; weak blocky structure; strong consistence dry; slightly sticky consistence wet; contains very few (<2%) calcareous nodule segregations; pH 9.2; sharp boundary to:

B3

100–120

Brownish yellow (2.5Y7/4) with (2.5YR4/8) mottles; sandy clay; weak blocky structure; strong consistence dry; slightly sticky consistence wet; contains very few (<2%) calcareous nodule segregations and sandstone fragments; pH 9.4.
Management considerations
  • Strong texture contrast soil.
  • Sandy surface soil with little structure, susceptible to wind and sheet erosion.
  • Slightly acidic to neutral surface soil, low nutrient availability.
  • Subsoil becomes highly alkaline with depth and clay decreases at depth.
  • Subsoil is sodic, with sodium and magnesium levels increasing at depth, dispersion likely.
  • Paler colours with red mottling indicate restrictive internal drainage but some oxidation present.
  • Landform element, swale; very poor site drainage.
Site
WIA31
Sample depth cm
pH
EC
dS/m
NaCl
%
Ex Ca
cmol-/kg
Ex Mg
cmol-/kg
Ex K
cmol-/kg
Ex Na
cmol-/kg
Ex Al
mg/kg
Ex acidity
cmol-/kg
FC
-30okPa
PWP
-1500okPa
KS
%
FS
%
Z
%
C
%
Horizon
H2O
CaCl2
A1
0–20
6.6
NA
0.11
0.01
1.9
1.6
0.2
0.3
NA
2.9
NA
4.6
51
34
4
9
B1
20–35
7.4
NA
0.23
0.04
5.2
7.1
0.9
2.4
NA
5
NA
17.9
32
19
2
45
B21
35–80
8.5
NA
0.51
0.05
5.2
9.6
1.5
3.1
NA
2.7
NA
21.1
28
17
3
52
B22
80–100
9.2
NA
0.53
0.05
4.8
11.1
1.9
4.4
NA
NA
NA
12.6
23
19
0
56
B3
100–120
9.4
NA
NA
0.05
3.8
8.7
1.5
3.8
NA
NA
NA
NA
23
12
0
42
Note: NA=not assessed
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