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OTR606

OTR606 landscape
Bald Hills landscape

    Site Code
OTR606

Melanic, Mottled-Mesonatric, Brown Sodosol

    Location
Anglesea Golf Course
    Landform
Undulating hills
    Geology
Palaeogene Eastern View Formation, fluvial sand, gravel, clay, brown coal
    Element
Hillslope – mid slope
    Slope
0%
    Aspect
-
Horizon
Depth (cm)
Description
A1
0–35Black (10YR2/1); loamy fine sand; apedal single grain structure; clear boundary to:

A2
35–60Light brownish grey (10YR6/2); loamy fine sand; apedal single grain structure; abrupt boundary to:

B2
60+Dark yellowish brown (10YR4/4) with grey (10YR5/1) mottles; fine sandy clay; moderate coarse (45 mm) subangular blocky structure; hard when dry.

Management considerations
Strong texture contrast between the surface soil and the subsoil may reduce and/or redirect the internal drainage and restricting root growth beyond the upper horizons. The sandy topsoil will likely have poor plant water holding and nutrient holding capacities that may be prone to erosion (wind, sheet and rill erosion). These soils may be hydrophobic (in conjunction with organic coatings) when dry, taking time to reabsorb moisture. The sandy topsoils however will drain rapidly. The bleached A2 horizon indicates restricted drainage, poor soil structure (often massive) and low organic matter, nutrient and water holding capacity. These bleached horizons may act as conduit for subsurface flow, particularly on sloping ground. The acidic nature of the upper horizons restricts the uptake of certain nutrients as well as intolerance for some plant species (due in part to the increasing mobilisation of aluminium and manganese). Sodic subsoils usually have poor structure (generally as coarse domed columns) resulting in dispersion (and subsequent clogging of pores), restricting water and gas movement through the subsoil. These soils are hardsetting and have limited opportunity for cultivation without further damage to soil structure.

Analytical data
Site OTR606
Sample
depth
pH
EC
NaCl
Ex Ca
Ex Mg
Ex K
Ex Na
Ex Al
Ex acidity
FC
(-10kPa)
PWP
(-150kPa)
KS
FS
Z
C
Horizon
cm
H2O
CaCl2
dS/m
%
cmolc/kg
cmolc/kg
cmolc/kg
cmolc/kg
mg/kg
cmolc/kg
%
%
%
%
%
%
A1
0-10
4.4
N/R
0.058
N/R
1.4
1.3
0.1
0.07
N/R
N/R
N/R
N/R
1
77
9
4
A1
10-20
4.4
N/R
0.052
N/R
0.7
0.9
0.1
0.07
N/R
N/R
N/R
N/R
1
80
9
4
A1
20-30
4.7
N/R
0.037
N/R
0.3
0.3
0.07
0.02
N/R
N/R
N/R
N/R
1
82
13
4
A2
50-60
5.5
N/R
0.064
N/R
0.2
0.7
0.1
0.1
N/R
N/R
N/R
N/R
1
80
12
6
B2
60-70
6.0
N/R
0.223
N/R
1.2
8.8
0.5
3.1
N/R
N/R
N/R
N/R
1
43
3
53
B2
130-140
7.4
N/R
0.300
N/R
0.9
5.0
0.3
2.5
N/R
N/R
N/R
N/R
1
59
5
33
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