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CLRA13

CLRA13 landscape
Hills around Deans Marsh

    Site Code
CLRA13

CLRA13 profile

Melacic-parapanic, Humosesquic, Semi-aquic Podosol
    Location
Deans Marsh (Cemetery Road), Otway Ranges, south-west Victoria
    Landform
Hills
    Geology
Paleogene Eastern View Formation: fluvial gravel, sand, clay, brown coal
    Element
Upper slope
    Slope
20%
    Aspect
East-north-east
Horizon
Depth (cm)
Description
Ah
0–25/60Black (10YR2/1), grey (10YR5/1 dry); loamy sand; apedal single grain structure; very weak consistence (moist); pH 5.0; clear irregular boundary to:

A2
25/60–30/130Grey (10YR6/1), light grey (10YR7/1dry); loamy sand; apedal single grain structure; very weak consistence (moist); pH 5.5; abrupt broken boundary to:

B21s
40/55–85Yellowish brown and dark yellowish brown (10YR5/8, 10YR4/6); loamy sand; apedal single grain structure; very weak consistence (moist); pH 6.0; abrupt broken boundary to:

B22s
85/130–+Very dark brown (10YR2/2); apedal massive structure; very strong consistence; weakly cemented ortstein; pH 6.0.

Management considerations


This sandy soil is also acidic meaning that the nutrient holding and waterholding capacity of the soil would be considered low. However the organic matter levels in the surface (6.5% OM) provides increased capacity for nutrient and water storage. The low pH means that nutrient availability is low and that aluminium and iron become more available/prevalent. The high clay content by laboratory determination of the surface soil is not consistent with the field texture and may indicate sample contamination. The light textures of this soil do not allow for the measurement of fine particle (silt and clay) stability (Emerson test). Where exposed this material is easily moved (little cohesion).

For management the depth of free draining material is important as is the variability of topsoil/soil depth. This soil varies in surface soil depth and is restricted at 85cm by a “coffee rock” horizon, restricting some downward drainage, promoting some lateral flow.
Analytical data
Site CLRA13
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
%
%
%
%
%
%
Ah
0–154.63.90.06
N/R
1.90.450.20.11531118.3
4.2
2.636.21837.5
A2
60–804.53.9<0.05
N/R
0.120.050.05<0.05211.413
0.6
23.262.511.53
B21s
60–805.54.9<0.05
N/R
0.580.150.110.09469.714
3.0
2456.6411
B22s
80–1205.44.7<0.05
N/R
0.50.260.130.1941320.6
4.6
21.552.87.513
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