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LS5

WLRA - soil pit LS5- landscape
Cultivated flat of the Diapur Ridge
    Site Code
LS5
WLRA - soil pit LS5- profile
Calcic, Mesonatric, Brown Sodosol

    Location

Diapur, western Victoria

    Landform

Ridge

    Geology

Pliocene Parilla Sand: marine sand and silt

    Element

Flat

    Slope

0–1 %

    Aspect

EastWestWest
Horizon
Depth (cm)
Description
A1
0–10
Dark brown (10YR3/3); fine sandy clay loam; weakly structured but fractures into platy fragments (caused by cultivation); firm consistence (dry); pH 6.4.
A2
10–20
Dark brown (10YR3/3); sporadically bleached sandy loam; massive (structureless); very strong consistence (dry); pH 7.4; sharp and wavy boundary to:
B21
20–40
Dark brown (10YR4/3); medium clay; moderate prismatic, parting to strong blocky structure; very strong consistence (dry); pH 8.7.
B22
40–65
Brown (10YR5/3); medium heavy clay; strong prismatic, parting to strong blocky structure; very strong consistence (dry); pH 8.9.
B23
65–100
Yellowish red (5YR4/6); heavy clay; strong prismatic, parting to strong blocky structure; contains few (5 - 10%) soft carbonate segregations as well as very few ferruginous nodules; pH 9.1.
Management considerations
  • Texture contrast between surface (A) horizons and subsoil (B21) horizon.
  • Hardsetting surface soil which may increase susceptibility to sheet and erosion
  • Neutral surface soil over alkaline subsoil
  • Subsoil has lower subsoil sodic and magnesic bulge. Very slight decrease in alkalinity with depth
  • Elevated flat/plain on ridge top, moderate to slow site drainage
Site
LS5
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
6.4
5.6
0.08
NR
7.8
2.2
0.6
0.2
NR
NR
16.6
9.2
NR
NR
NR
NR
A2
10–20
7.4
6.1
0.05
NR
5.1
1.8
0.3
0.7
NR
NR
12.8
7.3
33
42
9
13
B21
20–40
8.7
7.5
0.19
NR
8
6.6
0.6
3.7
NR
NR
31.8
21.1
NR
NR
NR
NR
B22
40–65
8.9
8
0.44
NR
7.5
8.2
0.9
5.6
NR
NR
NR
NR
NR
NR
NR
NR
B23
65–100
9.1
8.7
0.98
0.13
6.7
11.7
1.2
11.3
NR
NR
NR
NR
NR
NR
NR
NR
B24
100–150
9.4
8.7
1.04
0.17
5.1
8.3
0.9
9.5
NR
NR
NR
NR
NR
NR
NR
NR
B25
150+
9.2
8.6
1.07
0.19
6.1
9.6
0.9
8.5
NR
NR
NR
NR
NR
NR
NR
NR
Note: NA=not assessed
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