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LS6

WLRA - soil pit LS6- landscape
Yellow gum dominant on eastern slopes
    Site Code
LS6
WLRA - soil pit LS6- profile
Calcic, Mottled-Hypernatric, Grey Sodosol (sandy)

    Location

Diapur, western Victoria

    Landform

Rise

    Geology

Pliocene Parilla Sand: marine sand and silt

    Element

Hillslope (Middle)

    Slope

4%

    Aspect

East
Horizon
Depth (cm)
Description

A1

0–15

Very dark greyish brown (10YR3/2); loamy sand; single grain (structureless); weak consistence (dry); pH 6.1.

A2

15–20

Conspicuously bleached loamy sand; single grain (structureless); weak consistence (dry); contains a common (10%) amount of ferruginous nodules; pH 7.4; sharp boundary to:

A3

20–21

Conspicuously bleached cemented sand capping; pH 7.8.

B21

21–35

Dark greyish brown (10YR4/2) with (10YR5/4) and (7.5YR4/6) mottles; heavy clay; moderate columnar structure; very strong consistence (dry); pH 8.3.

B22k

35–65

Yellowish brown (10YR5/6) with (5YR5/6) mottles; medium heavy clay; strong prismatic, parting to strong blocky structure; strong consistence (moist); contains very few (2%) ferruginous nodules and many (50%) soft calcareous segregations; pH 8.9.

C

65+

Weathered sandstone.
Management considerations
  • Strong texture contrast between sandy surface (A) horizons and subsoil (B21) horizon. Only moderately deep
  • Non hardsetting nature of surface soil. Susceptible to wind, sheet and rill erosion, given texture, horizon depths and texture contrast nature
  • Coarse columnar structure at top of subsoil with capping, restrictive to water and gaseous movement.
  • Slightly acidic surface soil, alkaline subsoil which is strongly sodic and dispersible
Site
LS6
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
6.1
5.0
0.05
NA
1.6
0.5
0.3
0.1
NA
NA
7.6
3.9
NA
NA
NA
NA
A2
15–20
7.4
6.1
<0.05
NA
0.7
0.4
0.1
0.8
NA
NA
4.4
1.8
NA
NA
NA
NA
A3
20–21
7.8
6.4
0.07
NA
1.1
1.0
0.2
1.2
NA
NA
NA
NA
NA
NA
NA
NA
B21
21–35
8.3
7.3
0.33
NA
6.5
7.9
0.6
5.6
NA
NA
37.5
23.8
NA
NA
NA
NA
B22
35–65
8.9
8.0
0.53
NA
6.7
9.5
0.8
8.3
NA
NA
NA
NA
NA
NA
NA
NA
Note: NA=not assessed
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