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WIA10

WLRA - soil pit WIA10- landscape
Sheep grazing on pasture

    Site Code
WIA10

    Location

Murtoa, western Victoria

    Landform

Gently undulating plain

    Geology

Quaternary Woorinen Formation:
aeolian dune sand, calcareous clay

    Element

Valley flat
Horizon
Depth (cm)
Description

A1

0–15

Dark greyish brown (2.5Y4/2); medium clay; cracking and self-mulching surface condition; weak fine subangular blocky structure; weak consistence dry; slightly sticky consistence wet; pH 8.4; sharp boundary to:

B21

15–45

Dark grey (10YR4/1); light medium clay; subplastic; weak fine subangular blocky structure; strong consistence dry; slightly sticky consistence wet; pH 9.0.

B22

45–90

Dark grey (10YR4/1); medium heavy clay; subplastic; weak fine subangular blocky structure; weak consistence dry; slightly sticky consistence wet; very few (<2%) soft carbonate segregations; pH 9.2; gradual boundary to:

B231

90–115

Dark grey (10YR4/1); medium heavy clay; plastic; weak coarse subangular blocky structure; strong consistence dry; slightly sticky consistence wet; very few (<2%) hard carbonate segregations; pH 9.2.

B232

115–125

Dark grey (10YR4/1); medium heavy clay; plastic; weak coarse subangular blocky structure; strong consistence dry; slightly sticky consistence wet; very few (<2%) hard carbonate segregations; pH 9.1; gradual boundary to:

B31

125–150

Greyish brown (2.5YR5/2) light medium clay; plastic; weak subangular blocky structure; strong consistence dry; moderately sticky consistence wet; pH 9.2; gradual boundary to:

B32

150–185

Greyish brown (2.5YR5/2) light medium clay; plastic; weak subangular blocky structure; strong consistence dry; moderately sticky consistence wet; pH 9.0; gradual boundary to:

B33k

185–210

Light grey (10YR7/2) with (10YR6/3) mottles; light clay; plastic; weak subangular blocky structure; strong consistence dry; slightly sticky consistence wet; common (10-20%) soft and hard carbonate segregations; pH 9.2; gradual boundary to:

B34k

210–220

Light grey (10YR7/2) with (10YR6/6) mottles; light clay; plastic; moderate coarse subangular blocky structure; strong consistence dry; slightly sticky consistence wet; common (10­20%) soft carbonate segregations; pH 9.0.
Management considerations
  • Cracking clay profile, high clay percentage but deceases in deep subsoil
  • Friable self mulching surface
  • Very high calcium percentage in surface and upper and mid subsoil (to 90cm)
  • Lighter coloured deep subsoil, poorer internal drainage
  • Subsoil is strongly sodic and salinity increases at depth, particularly below 90cm
  • Landform element, valley flat: poor site drainage

Site
WIA10
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
0–15
8.4
NA
0.19
0.01
27.4
6.2
3.1
0.3
NA
NA
NA
24.4
12
13
8
63
B21
15–45
9.0
NA
0.18
0.02
26.7
8.1
2.0
2.6
NA
NA
NA
27.6
10
15
9
65
B22
45–90
9.2
NA
0.48
0.06
19.8
10.6
1.9
7.0
NA
NA
NA
29.3
10
14
9
64
B231
90–115
9.2
NA
0.91
0.14
14.3
11.4
2.0
13.1
NA
NA
NA
33.5
7
13
9
66
B232
115–125
9.1
NA
1.11
0.17
NA
NA
NA
NA
NA
NA
NA
NA
7
13
9
63
B31
125–150
9.2
NA
NA
0.19
NA
NA
NA
NA
NA
NA
NA
NA
7
11
7
63
B32
150–185
9.0
NA
1.35
0.21
NA
NA
NA
NA
NA
NA
NA
30.5
12
14
8
56
B33k
185–210
9.2
NA
1.31
0.22
NA
NA
NA
NA
NA
NA
NA
28.3
11
12
7
53
B34k
210–220
9.0
NA
NA
0.23
NA
NA
NA
NA
NA
NA
NA
26.0
15
8
9
54
Note: NA=not assessed
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