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SW50

Location: Garvoc

Australian Soil Classification: Epiacidic, Epipedal, Black VERTOSOL
General Landscape Description: Level plain between basalt barriers.
Site Description: Grazing paddock (dairy).
Mapping Unit: Unit 32 (Maher and Martin, 1987).
Geology: Quaternary - Newer volcanics (basalt).


SW50 Landscape
SW50 Landscape


Soil Profile Morphology:

Surface Soil

O0-10 cmOrganic mat:


A110-30 cmVery dark grey (10YR3/1); rusty root channel mottling; medium clay; strong very coarse blocky, parting to strong coarse blocky structure; strong consistence moist; pH 6.1:


Subsoil

B2130-60 cmVery dark grey (10YR3/1); medium clay; moderate to strong medium blocky, parting to moderate to strong fine blocky structure; weak consistence moist; pH 5.5:


B2260-130 cmVery dark grey (10YR3/1); medium clay; strong coarse lenticular, parting to fine lenticular structure; firm consistence moist; pH 6.8 (becoming pH 7.8 from 100 cm depth).



Soil Profile Characteristics:
-

pH
Salinity
Surface Soil
(A1 horizon)
Slightly Acid
Low-Moderate
Non-Sodic
Slight
Subsoil
(30-60 cm)
Strongly Acid
High
Non-Sodic
None
Deeper Subsoil
(100-130 cm)
Slightly Alkaline
High-Very High
Non-Sodic
None

SW50 pH
The surface is slightly acid. The subsoil
is strongly acid becoming slightly alkaline at 1 m.		SW50 Salinity
The surface salinity rating is low to moderate.
The subsoil is high becoming high to very high
at 80 cm depth.		SW50 Clay
The clay content is high throughout the profile.


Chemical and Physical Analysis:
Horizon
Horizon Depth
(cm)
pH
(water)
pH
(CaCl2)
EC
dS/m
NaCl
%
Organic Carbon
%
Total
Nitrogen
%
Exchangeable Cations
Coarse Sand
(0.2-2.0 mm)
%
Fine Sand
(0.02-0.2 mm)
%
Silt
(0.002-0.02 mm)
%
Clay
(<0.002 mm)
%
Field Capacity
% w/w
Wilting Point
% w/w
Ca
Mg
K
Na
meq/100g
A0
0-10
A1
10-30
6.1
5.4
0.34
0.03
4.4
0.35
20
16
0.2
2.1
1
11
14
62
66
40.9
B21
30-60
5.5
5.1
1
0.21
2.5
0.19
20
17
0.2
2.3
1
11
13
62
64.8
38.7
B22
60-100
6.8
6.4
1.3
0.23
1.8
0.12
22
18
0.2
2.4
1
11
14
62
66.9
38.7
B23
100-130
7.8
7.4
1.2
0.23
68
30
0.4
3.7
1
11
12
67
71
41.4


Profile Described By: Mark Imhof and Austin Brown, August 1998.
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