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WLRA143

WLRA - soil pit WLRA143- landscape
Cropped gentle rises

    Site Code
WLRA143
WLRA - soil pit WLRA143- profile
Vertic, Mottled-Hypernatric, Yellow Sodosol

    Location

Stawell-Joel South Road, Joel South, western Victoria

    Landform

Gently undulating rise

    Geology

Pliocene Parilla Sand:
marine sand and silt

    Element

Hillslope

    Slope

3%

    Aspect

West
Horizon
Depth (cm)
Description

A1

0–10

Brown (10YR4/3); sandy loam; massive (structureless); very weak dry consistence; common fine to very fine roots; water repellent; pH 6.5; abrupt and smooth boundary to:

A21

10–25

Brown (7.5YR4/3); conspicuously bleached very pale brown (10YR7/3 dry); sandy clay loam; massive (structureless); very weak dry consistence; few fine subrounded quartz gravels; few fine to very fine roots; pH 5.5; clear and irregular boundary to:

A22

25–35

Strong brown (7.5YR4/6); conspicuously bleached very pale brown (10YR8/4 dry) with very few fine to medium distinct yellow mottles; loamy sand, silty; massive (structureless); very weak dry consistence; few fine angular platy quartz gravels; common coarse ferromanganiferous nodules; few fine to very fine roots; pH 6.0; abrupt and irregular boundary to:

B21

35–80

Brownish yellow (10YR6/6) with many medium to coarse prominent (10R3/6) mottles; heavy clay; strong coarse to very coarse prismatic structure; rough ped-fabric; very firm moderately moist consistence; common distinct slickensides; few fine to very fine roots ; pH 7.5; diffuse and smooth boundary to:

B22

80–110+

Dark red (10R3/6) with many coarse to very coarse prominent (10YR6/4) mottles; heavy clay; weak medium to coarse prismatic structure; rough ped-fabric; strong moderately moist consistence; few distinct slickensides; few fine to very fine roots; pH 6.5
Management considerations
  • Strong texture contrast profile, highly sodic subsoil
  • Subsurface horizon is leached (bleached) with restrictive interface with subsoil (Note less clay than above and below). Few nutrients available
  • Acidic subsurface soil, neutral to alkaline upper subsoil and acidic deeper subsoil (local characteristic of parent material?)
  • Subsoil is very highly dispersive. Limited (preferably no) exposure necessary to remain stable. May be slightly saline with depth.
  • Surface soil is only slightly dispersive
  • Landscape position ,broad shallow ridge; slightly water shedding

Site
WLRA143
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
6.5
6.2
0.19
NA
7.2
0.85
0.68
0.41
NA
NA
28.8
8.3
34.2
39.8
7.6
16.5
A21
10–25
4.9
4.3
<0.05
NA
0.98
0.24
0.09
0.13
31
NA
15.3
3.6
41.4
39.2
12.8
6.5
A22
25–35
5.4
4.9
<0.05
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
B21
35–80
7.4
6.4
0.23
NA
4.5
10
0.59
5.3
NA
NA
51
31.9
1.8
3.1
22
67.5
B22
80–110+
5.4
4.8
0.37
0.02
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Note: NA=not assessed
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