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Profile Number 24

Laboratory number: 0991 A study of the land in the Catchment of Gippsland Lakes - Vol 2 - Soil profile 24Profile Description
Site number:661A110 - 7 cmVery dark greyish brown (10YR 3/2) silty loam; moderate crumb structure; rough-ped fabric; friable when moist; pH 5.9; clear wavy boundary
Classification:Northcote (1979) - Um6.21
Stace et al. (1972) - Alluvial Soil		Al2 7 - 17 cmVery dark greyish brown (10YR 3/2) silty loam; abundant distinct brown (<5 mm) mottles; moderate fine (5 mm) subangular blocky structure; rough-ped fabric; friable when moist; pH 5.7; diffuse wavy boundary
Location:Bairnsdale 8422, grid ref. 724240 2 km S of BruthenAC17 - 27 cmVery dark greyish brown (10YR 3/2) silty loam (with thin fine sand lenses); abundant distinct brown (<5 mm) mottles; moderate fine (5 mm) subangular blocky structure; rough-ped fabric; friable when moist, (fine sand is loose when moist); pH 5.9; abrupt smooth boundary
Land system, component: Maffra 1, 3IIA127 - 52 cmVery dark greyish brown (10YR 3/2) silty clay loam; abundant distinct brown (5 - 15 mm) mottles; moderate coarse (20 mm) angular blocky structure; rough-ped fabric; firm when moist; pH 5.9; abrupt boundary
Topography:Tambo River flood plain, hummocky, 1% slopeIIC 52 - 90+ cmYellowish brown (10YR 5/6) silty loam; abundant distinct grey (5 -15 mm) mottles; apedal; earthy fabric; friable when moist; pH 5.9
Elevation:15 m
Drainage:Poor
Parent material:Holocene medium-textured alluvium
Vegetation:Cleared; grassland mostly with introduced species
An older, buried profile occurs below 27 cm depth
LABORATORY ANALYSES 991
Horizon
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

%
All
Al2
IIA1
IIC
0 - 7
10 - 17
30 - 52
52 - 60
L
L
SiL
SiL
0
0
0
0
2
1
<1
<1
43
54
37
55
18
18
34
26
17
15
19
15
6.2
6.3
6.1
6.3
210
140
310
230
0.007
0.008
0.028
0.019
Horizon
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
All
0 - 7
4.0
0.43
12
1.6
52
180
0.037
0.26
8.7
6.0
0.4
0.5
26.9
32
22
1
2
43
Al2
10 - 17
2.3
0.20
15
1.8
25
70
8.0
4.3
0.1
0.5
20.9
38
21
<1
2
30
IIA1
30 - 52
1.4
0.15
12
12
40
0.028
0.28
8.2
5.1
0.09
1.0
24.5
33
21
<1
4
42
IIC
52 - 60
1.5
0.11
18
7.0
4.1
0.04
0.8
21.2
33
19
<1
4
44
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