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LS15

WLRA - soil pit LS15- landscape
Upper slope on northern spur of rise
    Site Code
LS15
WLRA - soil pit LS15- profile
Hypercalcic, Hypernatric, Red Sodosol

    Location

Netherby, western Victoria

    Landform

Gently undulating rise

    Geology

Pliocene Parilla Sand: marine sand and silt

    Element

Hillslope (upper)

    Slope

2–3%

    Aspect

West-south-west
Horizon
Depth (cm)
Description

A1

0–15

Dark brown (10YR3/3); sandy clay loam; weakly structured; weak consistence (dry); pH 7.7.

A2

15–20

Reddish brown (5YR4/4); sporadically bleached sandy clay loam; strong consistence (dry); pH 7.9; clear boundary to:

B21

20–30

Reddish brown (7.5YR4/4); medium clay; strong medium to coarse prismatic, parting to strong medium blocky structure; strong consistence (moist); pH 8.9.

B22

30–50

Dark red (2.5YR3/6); heavy clay; moderate medium prismatic, parting to strong medium blocky structure; very strong consistence (dry); pH 9.3.

B23

50–75

Yellowish red (5YR5/6); light medium clay; moderate medium prismatic, parting to strong medium blocky structure; firm consistence (moist); contains many (20­50%) soft calcareous segregations; pH 9.3.

B24

75–160

Light yellowish brown (10YR6/4) with (10YR5/8) and (7.5YR4/6) mottles; sandy clay; moderate coarse prismatic, parting to coarse polyhedral structure; strong consistence (moist); pH 9.2.

C

160+

Weathered sandstone.
Management considerations
  • Strong texture contrast between surface (A) and subsoil (B21) horizon.
  • Hardsetting nature of surface soil.
  • Structure and texture difference would indicate high susceptibility to compaction
  • Alkaline profile with high magnesium, sodium and salinity at depth
  • Nutrient levels of subsurface (A2) soil are low compared with soil above and below
  • Upper slope, good site drainage but poor internal drainage
  • Very slight alkalinity decrease at depth before reaching Parilla material
Site
LS15
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
7.7
7.3
0.35
<0.05
6.3
1.7
0.8
0.2
NA
NA
12.9
7.2
NA
NA
NA
NA
A2
15–20
7.9
7.2
0.15
NA
3.4
1.6
0.4
0.3
NA
NA
11.5
4.8
NA
NA
NA
NA
B21
20–30
8.9
8
0.46
<0.05
7.6
9.2
1.2
7.3
NA
NA
43.8
24.9
NA
NA
NA
NA
B22
30–50
9.3
8.6
0.94
0.11
6.5
11.6
1.5
10.4
NA
NA
40.5
25.5
NA
NA
NA
NA
B23
50–75
9.3
8.6
1.19
0.19
5.8
10.4
1.2
9.6
NA
NA
NA
NA
NA
NA
NA
NA
B24
75–160
9.2
8.4
1.02
0.16
5.2
10.2
1
10.4
NA
NA
NA
NA
NA
NA
NA
NA
Note: NA=not assessed
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