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WLRA142

WLRA - soil pit WLRA142- landscape
Undulating footslopes. Erosion control work showing on gully wall
    Site Code
WLRA142
WLRA - soil pit WLRA142- profile
Eutrophic, Mottled-Hypernatric, Brown Sodosol

    Location

Shays Flat-Malakoff Road, Landsborough, western Victoria

    Landform

Rolling low hills

    Geology

Palaeozoic (Cambrian) Warrak Formation: marine sandstone, siltstone, schist

    Element

Footslope

    Slope

6.5%

    Aspect

South
Horizon
Depth (cm)
Description

A1

0–10

Brown (7.5YR4/3); sandy loam, silty; massive (structureless); weak dry consistence; very few small subrounded gravels; pH 6.0; clear and smooth boundary to:

A2

10–30

Strong brown (7.5YR4/6); conspicuously bleached very pale brown (10YR8/3 dry); silty loam, fine sandy; massive (structureless); weak dry consistence; pH 6.0; clear and smooth boundary to:

A3

30–45

Pale yellow (2.5Y7/3); conspicuously bleached white (10YR8/1 dry) with common fine distinct orange and yellow mottles; silty loam, fine sandy; massive (structureless); strong dry consistence; very few fine earthy root linings; uncemented continuous massive densipan; pH 7.0; abrupt and smooth boundary to:

B21

45–80

Strong brown (7.5YR5/6) with common fine to medium faint orange and yellow mottles; light clay; weak medium prismatic, parting to weak medium angular blocky structure; rough to smooth ped-fabric; strong dry consistence; very few small angular quartz gravels; pH 8.5; gradual and smooth boundary to:

B22

80–135+

Dark yellowish brown (10YR4/4) with many fine (10YR7/6) mottles; light medium clay; massive (structureless); strong dry consistence; very few small angular quartz gravels; very few fine to medium manganiferous nodules; pH 8.0.
Management considerations
  • Strong texture contrast profile, highly sodic subsoil
  • Deep subsurface horizon, leached (bleached) with restrictive interface with subsoil
  • Acidic surface soil , neutral deep subsurface and upper subsoil and alkaline deeper subsoil
  • Deeper subsurface and subsoil are very highly dispersive. Limited (preferably no) exposure necessary to remain stable
  • Surface soil is only slightly dispersive
  • Landscape position as footslope; exposure will accelerate rill/gully erosion in susceptible areas( depressions/drainage lines)
Site
WLRA142
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
5.1
4.5
0.05
NA
1.3
0.33
0.25
0.08
24
NA
32.4
5.4
4.7
67.7
18
6.5
A2
10–30
5.2
4.7
<0.05
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
A3
30–45
7
5.9
0.08
NA
1.3
2.1
0.09
1
NA
NA
19.9
7.6
5.4
61.3
11.5
19.5
B21
45–80
7.5
6.4
0.2
NA
2.7
6.7
0.31
3.7
NA
NA
31.9
18.7
4.1
35.5
11
47
B22
80–135+
8.4
7.4
0.29
0.05
1.9
7.7
0.4
5.4
NA
NA
31.7
18.6
2.7
43.4
10.5
38.5
Note: NA=not assessed
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