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WIA9

    Site Code
 WIA9

    Location

Murtoa, western Victoria

    Landform

Gently undulating plain

    Geology

Pliocene Parilla Sand: marine sand and silt

    Element

Hillslope
Horizon
Depth (cm)
Description

A1

0–10

Dark greyish brown (10YR4/2); light clay; subplastic; cracking and self-mulching surface condition; weak coarse granular structure; very weak consistence dry; slightly sticky consistence wet; pH 8.5; sharp boundary to:

B21

10–45

Dark grey (10YR4/1); medium clay; subplastic; weak coarse subangular blocky structure; strong consistence dry; slightly sticky consistence wet; pH 9.1.

B22

45–95

Dark grey (10YR4/1); medium clay; subplastic; weak coarse subangular blocky structure; strong consistence dry; slightly sticky consistence wet; very few (<2%) hard carbonate segregations; pH 9.3.

B23

95–110

Grey (10YR5/1); medium clay; subplastic; weak coarse subangular blocky structure; strong consistence dry; slightly sticky consistence wet; very few (<2%) hard carbonate segregations; pH 9.2.

B24

110–145

Grey (10YR5/1) with (7.5YR6/6) mottles; medium clay; subplastic; weak coarse subangular blocky structure; strong consistence dry; slightly sticky consistence wet; very few (<2%) hard carbonate segregations; pH 9.2; gradual boundary to:

B31

145–190

Reddish yellow (7.5YR6/6) with (10YR5/2) mottles; heavy clay; plastic; moderate coarse subangular blocky structure; strong consistence dry; moderately sticky consistence wet; very few (<2%) hard carbonate segregations; pH 9.0; gradual boundary to:

B32

190–220

Reddish yellow (7.5YR6/6) with (2.5YR4/8) mottles; medium heavy clay sandy; plastic; moderate coarse blocky structure; strong consistence dry; moderately sticky consistence wet; very few (<2%) hard carbonate segregations and few (2-10%) weathered sandstone; pH 8.9.
Management considerations
  • Cracking (vertic) clay soil, high clay content decreasing at depth (with sandstone inclusions).
  • Highly alkaline soil, decreasing at depth.
  • Friable, self-mulching surface, subplastic (seems lighter than lab data would suggest).
  • High calcium levels in surface and upper subsoil, decreasing with depth.
  • Sodic subsoil, becoming strongly sodic below 60 cm.
  • High salt levels below 95 cm.
  • Landscape element, hillslope; moderate site drainage.
Site
WIA9
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
0–10
8.5
NA
0.18
0.01
31.2
3.9
1.7
1.2
NA
2.5
NA
22.6
12
17
9
58
B21
10–45
9.1
NA
0.22
0.02
26
8
1.4
2.9
NA
NA
NA
34.1
16
16
8
59
B22
45–95
9.3
NA
0.43
0.05
20
11.3
1.3
8.4
NA
NA
NA
28.2
15
14
9
58
B23
95–110
9.2
NA
0.7
0.09
17.4
12.6
1.6
12.9
NA
NA
NA
30.4
9
15
9
59
B24
110–145
9.2
NA
0.9
0.1
16.5
12.2
1.5
13.1
NA
NA
NA
28.7
7
12
9
62
B31
145–190
9.0
NA
1.16
0.15
NA
NA
NA
NA
NA
NA
NA
28.2
9
12
8
62
B32
190–220
8.9
NA
1.01
0.12
NA
NA
NA
NA
NA
NA
NA
20.6
28
12
8
50
Note: NA=not assessed
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