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Profile Number 25

Laboratory number: 0988 A study of the land in the Catchment of Gippsland Lakes - Vol 2 - Soil profile 25Profile Description
Site number:662All 0 - 20 cmVery dark brown (10YR 2/2) silty loam; moderate crumb structure; rough-ped fabric; friable when moist; abundant roots; mica; pH 5.5; gradual wavy boundary
Classification:Northcote (1979) - Um6.21
Stace et al. (1972) - Alluvial Soil		Al2 20 - 35 cmBlack (10YR 2/1) silty clay loam; moderate crumb structure; rough-ped fabric; friable when moist; common roots; mica; pH 6.0; clear smooth boundary
Location:Bairnsdale 8422, grid ref. 707103
On bank of Tambo River 1 km from its mouth		C135 - 46 cmDark brown (10YR 4/3) silty clay loam; abundant distinct grey (5 - 15 mm) mottles; apedal; earthy fabric; friable when moist; few roots; mica; pH 6.0; clear smooth boundary
Land system, component: Delta, 1C2 46 - 68 cmDark brown (10YR 4/3) loamy sand; abundant distinct grey (5 - 15 mm) mottles; apedal; earthy fabric; firm when moist; mica; pH 7.0; clear smooth boundary
Topography:1% levee slope on river deltaC368 - 90 cmDark yellowish brown (10YR 4/6) silty loam clay; abundant prominent grey (5 - 15 mm) mottles; apedal; earthy fabric; very firm when moist; mica; pH 7.0
Elevation:10 m
Drainage:Imperfect
Parent material:Holocene fine-textured alluvium
Vegetation:Cleared; mostly introduced grasses with occasional Eucalyptus tereticornis
LABORATORY ANALYSES 988
Sample
Depth

cm
Lab.
texture
Particle size distribution
Atterberg limits
1:5 soil water suspension
Clay mineralogy by x-ray diffraction
Gravel

%
Coarse
sand
% f.e.
fine sand

% f.e.
Silt

% f.e.
Clay

% f.e.
liquid
limit
%
plastic
limit
%
plasticity
index
%
linear
shrinkage
%
pH
EC
25°C
uS/cm
Cl-

%
Depth

cm
Composition

%
0 - 10
L
0
2
34
22
19
5.4
210
0.016
10 - 20
L
0
2
41
24
19
5.6
71
0.004
20 - 30
L
0
2
52
23
16
5.9
51
0.002
30 - 35
L
0
2
51
23
16
6.2
64
0.003
35 - 46
L
0
3
54
23
14
6.5
71
0.003
68 - 90
L
0
2
53
20
18
6.9
390
0.037
Sample
Depth

cm
Org. C


%
Total N


%
1.3C
N
Free
Fe2O3

%
Available
HCl extract
Exchangeable cations
P
ppm
K
ppm
P
%
K
%
Ca
Mg
K
Na
CEC
Ca
% of CEC
Mg
K
Na
H
Milliequivalents/100g
0 - 10
3.9
0.53
10
1.2
69
320
0.045
0.26
2.7
3.1
0.9
0.7
36.7
7
8
2
2
81
10 - 20
4.0
0.33
16
47
180
1.8
2.1
0.5
0.6
32.7
6
6
2
2
84
20 - 30
2.7
0.20
18
1.6
2.5
0.4
0.7
25.4
6
10
2
3
79
30 - 35
1.6
0.14
15
1.3
16
120
0.025
0.26
2.2
3.5
0.3
0.9
20.5
11
17
1
4
67
35 - 46
1.1
0.077
19
1.8
8
90
0.026
0.26
2.7
4.7
0.2
1.1
16.3
17
29
1
7
46
68 - 90
16
240
0.026
0.32
2.4
5.4
0.5
3.6
16.0
15
34
3
23
25
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