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MM219

Site code

      MM219
Location
      Woodbourne (Coopers Road), Shelford district, south-west Victoria
Landform
      Undulating low hills
Geology
      Ordovician Castlemaine Supergroup: marine sandstone, siltstone, shale, chert; Lancefieldian
Element
      Mid slopes

Profile morphology
Horizon

Depth (cm)

Description

A1
0–30
Very dark greyish brown (10YR3/2); sandy loam; apedal massive structure; very weak consistence (dry); sharp boundary to:

A2
30–50
Brown (10YR5/3), light grey (10YR7/2 dry) conspicuously bleached; loamy sand; very weak consistence (dry); common fine to coarse segregations; sharp boundary to:

B21
50–85
Yellowish brown (10YR5/6) with red (2.5YR4/6) mottles; heavy clay; strong coarse blocky structure; very firm consistence (dry); clear boundary to:

B22
85+
Brownish yellow (10YR6/6) with red (10Y3/6) mottles; medium clayey sand; weak coarse blocky structure; firm consistence (moderately moist).

ASC: Ferric, Bleached-mesonatric, Brown Sodosol

Analytical data Source: Government of Victoria, State Chemistry Laboratory.

Site MM219
Sample
depth
pH
EC
NaCl
Ex Ca
Ex Mg
Ex K
Ex Na
Ex Al
Ex acidity
Horizon
cm
H2O
CaCl2
dS/m
%
cmolc/kg
cmolc/kg
cmolc/kg
cmolc/kg
mg/kg
cmolc/kg
A1
0–30
5.4
N/R
0.03
N/R
N/R
N/R
N/R
N/R
N/R
N/R
A2
30–50
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
B21
50–85
7
N/R
0.17
0.02
1.1
10
0.17
3.1
N/R
7.8
B22
85+
7.1
N/R
0.21
0.03
N/R
N/R
N/R
N/R
N/R
N/R

Site MM219
Sample
depth
FC
(-10kPa)
PWP
(-1500kPa)
KS
FS
Z
C
Org C
Bulk density
Horizon
cm
%
%
%
%
%
%
%
t m-3
A1
0–30
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
A2
30–50
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
B21
50–85
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
B22
85+
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R

Management considerations
This soil exhibits a strong texture contrast between the sandy surface soil and the medium to heavy clay subsoil and will have a significant impact upon the deep soil permeability. The surface soil is light and sandy with high permeability and a conspicuously bleached A2 horizon whereas the subsoil is medium to heavy clay and acts as a barrier to water movement. Mottles at depth indicate periods of waterlogging. Acidic topsoils and sodic subsoils are other key features of this soil type.

Management options include the application of lime to reduce acidity by increasing the pH, and the application of gypsum to allow greater development of ped structure in the subsoil and reduce dispersion. Other options include reduced tillage, maintaining a vegetative cover, improving organic matter content and altering the subsoil through artificial drainage.
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