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MM5150

Site code
      MM5150
Location
      Lal Lal Reservoir (Rotten Lane), Gordon district, central Victorian Highlands
Landform
      Gently undulating plains
Geology
      Neogene fluvial post Newer Volcanic hillwash: gravel, sand, silt
Element
      Mid slope

Profile morphology
Horizon

Depth (cm)

Description

A1
0–20
Very dark greyish brown (10YR3/2); sandy loam; apedal massive structure; weak consistence (dry); clear boundary to:
A2
20–65
Pale brown (10YR6/3), sporadically bleached, light grey (10YR7/2 dry); sandy loam; apedal massive structure; weak consistence (dry); boundary to:
B21
65+
Yellowish brown (10YR5/6) with yellowish brown (7.5YR5/8) mottles; medium clay; strong coarse blocky structure; firm consistence (moderately moist).

ASC: Melanic-Mottled, Dystrophic, Brown Chromosol

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

Site MM5150
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
0–20
5.5
N/R
0.06
N/R
0.6
0.6
0.2
0.1
N/R
9.3
A2
20–65
5.9
N/R
0.01
N/R
0.2
0.2
0
0
N/R
15.1
B21
65+
5.7
N/R
0.03
N/R
0.6
0.6
0.1
0.2
N/R
5.7

Site MM5150
Sample
depth
FC
(-10kPa)
PWP
(-1500kPa)
KS
FS
Z
C
Org C
Bulk density
Horizon
cm
%
%
%
%
%
%
%
t m-3
A1
0–20
17.9
5.3
41
37
10
10
2.3
1.32
A2
20–65
N/R
N/R
39
40
10
10
N/R
N/R
B21
65+
31.1
14
20
31
6
41
N/R
1.56

Management considerations
Strong texture contrast between the sandy topsoil and the medium clay subsoil is a very important soil feature and may impact upon subsoil permeability. The sporadically bleached A2 horizon is a key feature of this profile while 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 and hold the sandy topsoil in place. Penetration by deep-rooted crops is also a recommended management practice.
CC BY 4.0 AU

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