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Profile Number 46

Laboratory number: 0973A study of the land in the Catchment of Gippsland Lakes - Vol 2 - Soil profile 46Profile Description
Site number:491A10-12 cmDark brown (7.5YR 3/2) sandy loam; weak crumb structure; rough-ped fabric; hard when dry; abundant roots; pH 5.7; clear boundary
Classification:Northcote (1979) – Db2.21
Stace et al (1972) – Brown Podzolic soil 		A2112-36 cmDark brown (7.5YR 3/2) gritty sandy loam; apedal; earthy fabric; hard when dry; about 30% of fine quartz gravel up to 3 mm; common roots; pH 6.0; clear boundary
Location:Omeo 8423, grid ref: 617854
12 km SE of Omeo		A2236-52 cmStrong brown (7.5YR 5/6) gritty sandy loam; apedal; earthy fabric; hard when dry; 30% of fine quartz gravel up to 3 mm; common roots; pH 5.5; clear boundary
Land system, component: Dargo, 1B252-70 cmStrong brown (7.5YR 4/6) medium clay becoming yellowish red (5YR 5/6) at depth; abundant faint red (<5 mm) mottles; moderate (10 mm) angular blocky structure; smooth-ped fabric; very hard when dry; few roots; pH 5.5; gradual boundary
Topography:Upper mid-slope of hill, SW aspect, 15% gradientC70 - 83+ cmSandy clay; apedal; rough-ped fabric; very hard when dry; biotite, plagioclase feldspar, quartz and small amount of muscovite are clearly visible; pH 5.0
Elevation:440 m
Drainage:Imperfect
Parent material:Palaeozoic granite
Vegetation:Cleared; grassland with Themeda australis, Cynosurus echinatus and Dactylis glomerata with a few remaining Eucalyptus albens and E. viminalis
LABORATORY ANALYSES 973
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

%
Al
0 - 10
L
11
34
36
15
12
6.2
45
0.005
A21
20 - 30
LS
15
38
36
18
7
6.5
14
0.002
A22
36 - 52
L
20
38
31
14
16
6.7
17
0.002
B2
52 - 60
C
16
16
16
5
63
75
26
49
15
6.3
26
0.004
C
70 - 83
C
21
28
25
10
34
6.4
17
0.002
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
Al
0 - 10
2.2
0.20
14
0.9
10
280
0.023
0.24
4.5
1.3
0.5
0.08
14.6
31
9
3
1
56
A21
20 - 30
0.76
0.031
32
0.7
3
120
0.012
0.14
3.9
0.5
0.2
0.02
8.2
48
6
2
<1
44
A22
36 - 52
1.5
0.012
026
3.6
0.8
0.3
0.07
7.8
46
10
4
1
39
B2
52 - 60
3.7
0.013
0.36
9.3
2.9
0.5
0.3
25.1
37
12
2
1
48
C
70 - 83
2.5
0.009
0.42
9.5
3.1
0.5
0.4
21.2
45
15
2
2
36
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