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LS10

WLRA - soil pit LS10- landscape
Mid slope of ridge with gully erosion common
    Site Code
LS10
WLRA - soil pit LS10- profile
Calcic, Mottled-Mesonatric, Yellow Sodosol (sandy)

    Location

Propodollah Ridge, western Victoria

    Landform

Ridge

    Geology

Pliocene Parilla Sand: marine sand and silt

    Element

Hillslope (middle)

    Slope

3%

    Aspect
North-east
Horizon
Depth (cm)
Description

A1

0–10

Brown (10YR4/3) loamy sand; weakly structured; weak consistence (dry); contains very few (2%) ferromanganiferous nodules; pH 6.3; sharp and wavy boundary to:

A2

10–15

Discontinuous light yellowish brown (10YR6/4) conspicuously bleached sand; single grained (structureless); loose consistence (dry).

B11

15–18

Yellowish red (5YR5/6) and (10YR6/4) mottles; sandy loam (clayey); single grained (structureless), very firm consistence (moist); pH 7.7.

B12

18–30

Yellowish brown (10YR5/4) with (7.5YR5/8) mottles; light sandy clay loam; single grained (structureless), strong consistence (moist); pH 8.1.

B21

30–55

Pale yellow (2.5YR7/4) light clay (sandy); moderate coarse blocky structure; very strong consistence (moist); pH 8.8.

B22

55–70

Light brown (7.5YR6/4) medium clay (sandy); contains a common (10–20%) amount of soft calcareous segregations; pH 9.5.

B23

70–90

Brownish yellow (10YR6/5) with yellowish red mottles; light medium clay (sandy); contains a common (10–20%) amount of ferruginous nodules; pH 9.2.

B24

90–110

Similar to above with more mottling

C

110+

Weathered sandstone.
Management considerations
  • Strong texture contrast between sandy surface horizons and clayey subsoils. Major increase in clay from upper subsoil (B1 horizons) and major subsoil (B2 horizon). Could be regarded as a gradational (Kandosol) profile
  • Conspicuously bleached subsurface (A2) horizon.
  • Discontinuous presence of coarse columnar structure at the top of the subsoil. This structure is an indication of strong sodicity
  • Neutral to slightly acid surface and alkaline subsoil with slight decrease in alkalinity at depth
  • Strongly sodic at depth and significant salinity (EC values) at depth
  • Nutrients concentrated in subsoil, including calcium carbonate
Site
LS10
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
6.3
5.8
0.28
NA
3.1
0.1
0.1
<0.1
NA
NA
6.6
1.9
NA
NA
NA
NA
A2
10–15
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
B11
15–18
7.7
6.7
0.16
NA
2.6
2.5
0.1
1.1
NA
NA
10.7
4.2
56
28
3
12
B12
18–30
8.1
6.8
0.14
NA
2.5
3.7
0.2
1.8
NA
NA
13.8
5
42
40
2
15
B21
30–55
8.8
7.9
0.38
<0.05
4.2
9.3
0.4
5.6
NA
NA
NA
NA
33
25
3
36
B22
55–70
9.5
8.7
1.09
0.17
5
6.5
0.5
7.8
NA
NA
NA
NA
NA
NA
NA
NA
B23
70–90
9.2
8.5
1.08
0.19
3.2
6.6
0.5
7.4
NA
NA
NA
NA
38
33
2
26
B24
90–110
8.2
7.5
1.2
0.24
3
6.7
0.5
7.4
NA
NA
NA
NA
NA
NA
NA
NA
Note: NA=not assessed
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