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CLRA9

CLRA9 landscape

Plateaux dissected with creek valley near Timboon
    Site Code
CLRA9
CLRA9 profile
Haplic, Eutrophic, Red Kurosol

    Location
Timboon (Timboon Curdie Vale Road), Heytesbury district, south-west Victoria
    Landform
Dissected plateaux
    Geology
Neogene Port Campbell Limestone: marine calcarenite, marl
    Element
Upper slope
    Slope
22%
    Aspect
West-south-west
Horizon
Depth (cm)
Description
A11
0–10Very dark greyish brown (10YR3/2); very fine sandy clay loam; strong fine to coarse subangular blocky structure; rough ped fabric; strong consistence (dry); pH 7; boundary to:

A12
10–23Dark brown (10YR3/3); light clay; strong fine to coarse polyhedral structure; rough and smooth ped fabric; strong consistence (dry); pH 7; clear irregular boundary to:

B21
23–75Dark reddish brown (5YR3/3); medium clay; strong very fine to fine polyhedral and lenticular structure; smooth ped fabric; strong consistence (dry); pH 5.5; sharp wavy boundary to:

C
75+Rock

Management considerations

This soil is texture contrast with a moderately deep surface soil and moderate soil depth (less than 1 metre), which has the potential for restricted drainage. This is an acidic profile overlying calcareous parent material due mainly to the relatively high rainfall of the area. The soil is well drained (red colour, no mottling) due to the soil structure despite the very high clay content and site drainage (22% slope) and the limestone below. Nutrient levels are high particularly in the lower subsoil and the surface nutrient status has been altered by management to improve nutrient availability by increasing the pH.


The soil has reasonable depth for root penetration and high organic matter (8.4% OM) in the surface soil and the subsurface soil (5.9% OM).

This soil is quite stable; very stable in the surface but slightly dispersive in the subsurface [Emerson 8 and 3(1)] and stable in the subsoil [Emerson 5].
Analytical data
Site CLRA9
Sample
depth
pH
EC
NaCl
Ex Ca
Ex Mg
Ex K
Ex Na
Ex Al
Ex Acidity
FC
–10kPa
PWP
–1500kPa
KS
FS
Z
C
Horizon
cm
H2O
CaCl2
dS/m
%
cmolc/kg
cmolc/kg
cmolc/kg
cmolc/kg
mg/kg
cmolc/kg
%
%
%
%
%
%
A11
0–1076.60.29
N/R
183.20.50.8
N/R
N/R
45.3
29.2
3.322.94141
A12
10–206.66.10.15
N/R
224.70.630.92
N/R
N/R
41
24.3
1.425.52044.5
B21
30–455.44.60.12
N/R
1660.661.1
N/R
N/R
52.8
31.6
113.610.569.5
B21
50–655.14.40.2
N/R
195.40.731.358023
N/R
N/R
0.58.43.582.5
B/C
75–904.94.20.09
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
C
100+8.88.10.11
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
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