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MM204

Site code
      MM204
Location
      Rokewood Junction (Dereel Road), Rokewood district,
      south-west Victoria
Landform
      Low hills
Geology
      Neogene Hanson Plain Sand: fluvial gravel, sand, silt
Element
      Crest

Profile morphology
Horizon

Depth (cm)

Description

A1
0–25
Brown (7.5YR4/4); sandy loam; apedal massive structure; weak consistence (dry); common fine segregations; clear boundary to:
A2
25–50
Strong brown (7.5YR5/6), pink (7.5YR7/4 dry) conspicuously bleached; sandy loam; very many fine to coarse segregations; sharp boundary to:
B21
50+
Yellowish brown (10YR5/6) with red (2.5YR4/6) mottles; medium clay; moderate fine blocky structure; firm consistence (moderately moist); common fine segregations.

ASC: Ferric, Mottled-Subnatric, Brown Sodosol

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

Site MM204
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
0–25
5.6
N/R
0.05
N/R
1.1
1.1
0.2
0.1
N/R
9.9
A2
25–50
6.1
N/R
0.03
N/R
1.2
1.2
0.1
0.1
N/R
5
B21
50+
6.3
N/R
0.05
N/R
0.5
0.5
0.2
0.7
N/R
4.7

Site MM204
Sample
depth
FC
(-10kPa)
PWP
(-1500kPa)
KS
FS
Z
C
Org C
Bulk density
Horizon
cm
%
%
%
%
%
%
%
t m-3
A1
0–25
13.1
5.7
56
28
7
6
1.6
1.65
A2
25–50
N/R
N/R
47
31
8
12
0.8
N/R
B21
50+
32.1
25.1
17
13
3
68
N/R
1.31

Management considerations
Strong texture contrast between the surface soil and the subsoil is a very important soil feature and may impact upon subsoil permeability. Conspicuously bleached A2 horizons containing Ferruginous and Ferromanganiferous nodules and concretions are key features of this profile. Sodic and mottled subsoils are other prominent features of this soil type.

The application of gypsum would be suitable for soil structure and improved permeability, while increasing organic matter and maintaining vegetative cover is important to help improve the soil structure. Penetration by deep-rooted crops is also useful as is minimum tillage practices which avoids bringing the sodic material to the surface.
CC BY 4.0 AU

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