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WIA33

    Site Code
WIA33

    Location

Longerenong, western Victoria

    Landform

Anastomotic plain

    Geology

Quaternary Coonambidgal Formation:
fluvial to lacustrine clays and sands

    Element

Plain
Horizon
Depth (cm)
Description

A1

0–5

Very dark grey brown (10YR3/2); clay loam; strongly subplastic; cracking and self-mulching surface condition; weak very fine subangular blocky structure; very weak consistence dry; pH 8.3; sharp boundary to:

B21

5–30

Dark grey brown (2.5Y4/2); light clay; subplastic; strong coarse blocky structure; strong consistence dry; pH 8.8; clear boundary to:

B22

30–60

Dark grey brown (2.5Y4/2); light clay; subplastic; strong coarse blocky structure; strong consistence dry; pH 9.0; gradual boundary to:

B23

60–90

Dark grey brown (2.5Y4/2); medium clay; moderate very coarse blocky structure; strong consistence dry; pH 9.0; clear boundary to:

B24

90–120

Dark grey brown (2.5Y4/2); medium clay; moderate very coarse blocky structure; strong consistence dry; very few (<2%) medium hard carbonate segregations; pH 9.0; gradual boundary to:

B25k

120–150

Dark grey brown (2.5Y4/2) with faint (10YR4/3) mottles; light clay; subplastic; weak very coarse blocky structure; strong consistence dry; common (10-20%) medium (size 2-6 mm) hard carbonate segregations; field pH 9.0; gradual boundary to:

B31k
150–185

Light yellowish brown (10YR6/4) with faint (10YR5/2) mottles; medium clay; weak very coarse blocky structure; strong consistence dry; common (10­20%) medium (size 2­6 mm) soft carbonate segregations; field pH 9.0; diffuse boundary to:

B32k
185–215

Brown (10YR5/3) with (10YR5/4) mottles; medium clay; weak very coarse blocky structure; strong consistence dry; slightly sticky consistence wet; common (10-20%) medium (size 2-6 mm) soft carbonate segregations; field pH 9.0.
Management considerations
  • Cracking clay profile, alkaline throughout
  • Friable self mulching surface, subplastic (feels much lighter than lab tests suggest)
  • Very high calcium percentage in surface and upper subsoil (aids structure and friability)
  • Darker colour to 120 cm and structured, more favourable than material below
  • Lighter coloured deep subsoil, poorer internal drainage
  • Subsoil is likely to be sodic and salinity increase at depth
  • Landform element, plain: poor site drainage unless near drainage line

Site
WIA33
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
0–5
8.3
NA
0.18
0.03
24.7
5.6
3
0.4
NA
NA
33.7
21.8
7
25
17
48
B21
5–30
8.8
NA
0.19
0.02
20.3
9.4
1.8
2.1
NA
NA
NA
NA
6
20
11
59
B22
30–60
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
B23
60–90
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
B24
90–120
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
B25k
120–150
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
B31k
150–185
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
B32k
185–215
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Note: NA=not assessed
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