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WIA19

    Site Code
 WIA19
WLRA - soil pit WIA19- profile
Episodic-Epicalcareous, Self-mulching, Grey Vertosol

    Location

Drung Drung, Horsham, western Victoria

    Landform

Anastomotic plain

    Geology

Quaternary Shepparton Formation: fluvial silt, sand and minor gravel

    Element

Plain
Horizon
Depth (cm)
Description

A1

0–10

Dark grey (10YR4/1); light clay; subplastic; cracking and self-mulching surface condition; weak subangular blocky structure; weak consistence dry; slightly sticky consistence wet; very few (<2%) hard carbonate segregations; pH 6.8; sharp and wavy boundary to:

B21

10–25

Dark grey (10YR4/1); light clay; subplastic; moderate very coarse prismatic structure; strong consistence dry; slightly sticky consistence wet; very few (<2%) hard carbonate segregations; pH 8.6.

B22

25–60

Dark grey (10YR4/1); medium heavy clay; subplastic; moderate very coarse prismatic structure; weak consistence dry; slightly sticky consistence wet; very few (<2%) hard carbonate segregations; pH 8.9; gradual and smooth boundary to:

B23

60–90

Dark grey (10YR4/1); heavy clay; plastic; coarse lenticular structure (slickensides); very few (<2%) hard carbonate segregations; pH 9.2; gradual boundary to:

B31k

90–130

Greyish brown (10YR5/2); heavy clay; plastic; coarse lenticular structure (slickensides); few (2-10%) hard carbonate segregations; pH 9.3; gradual boundary to:

B32

130–195
Greyish brown (10YR5/2); medium clay; plastic; moderate angular blocky structure; very strong consistence dry; slightly sticky consistence wet; very few (<2%) hard carbonate segregations; pH 9.4.

Management considerations
  • Cracking clay profile, possible texture contrast
  • Sodic surface, possible surface sealing/impeded infiltration despite self mulching characteristic
  • High fine sand content of surface (possible windblown inclusions)
  • High calcium levels in upper subsoil, high magnesium levels in lower subsoil
  • Sodic subsoil below 60 cm, increasing with depth
  • Landform element, plain; slow site drainage, unless near drainage line
Site
WIA19
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
6.8
NA
0.17
0.02
2.7
6.9
0.6
2
NA
5.1
29.9
11.7
29
38
3
28
B21
10–25
8.6
NA
0.12
0.01
22.9
10.3
1.7
0.8
NA
3.6
NA
22.4
9
21
9
61
B22
25–60
8.9
NA
0.17
0.01
17
15.5
1.3
1.7
NA
5.3
NA
23.3
8
18
8
63
B23
60–90
9.2
NA
0.24
0.03
13.4
19.8
1.5
3.3
NA
NA
NA
25.5
7
17
9
64
B31k
90–130
9.3
NA
0.33
0.02
11.5
20.8
1.5
5.4
NA
NA
NA
26.7
8
15
9
65
B32
130–195
9.4
NA
0.44
0.02
NA
NA
NA
NA
NA
NA
NA
28.5
4
13
10
68
Note: NA=not assessed
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