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EGN771

Australian Soil Classification: Arenic RUDOSOL

Map Unit: Recent marine
Previous Site Name: 771


Geology: Holocene marine sediments


Soil Profile Morphology:

Surface Soil
Flood deposit0-4 cmFine sandy loam; pH 8.3; changes to:


A14-6 cmFine sand; pH 8.8; changes to:

Subsoil
C6-10 cmFine sand; pH 9.0; changes to:


C10-20 cmCoarse sand; pH 9.1; changes to:


C20-30 cm Coarse sand; pH 9.1; changes to:


C50-60 cmCoarse sand; pH 8.4; changes to:


D70-80 cmCoarse sand; pH 8.1.

Key Profile Features:
  • Sand textures throughout.
  • The EC values indicate the soil is saline, alkaline and would only support salt marsh species.
  • Shells are present throughout the profile.


Chemical and Physical Analysis:


Horizon
Horizon Depth
(cm)
pH
(water)
EC
dS/m
Organic Carbon
%
Total
Nitrogen
%
Exchangeable Cations
Gravel
%
Coarse Sand
(0.2-2.0 mm)
%
Fine Sand
(0.02-0.2 mm)
%
Silt
(0.002-0.02 mm)
%
Clay
(<0.002 mm)
%
Ca
Mg
K
Na
meq/100g
Flood deposit
0-4
8.3
6.3
2.0
0.18
7.8
7.8
1.0
4.0
5#
22
44
1
5
A1
4-6
8.8
1.7
0.52
0.05
4.8
2.7
0.4
1.3
2#
33
54
1
2
C
6-10
9.0
0.87
0.24
0.03
3.1
1.2
0.2
0.4
3#
24
67
<1
1
C
10-20
9.1
0.61
0.08
0.01
4#
C
20-30
9.1
0.62
0.05
0.01
3#
C
50-60
8.4
1.0
3.2
0.7
0.2
0.3
3#
56
36
<1
2
D
70-80
8.1
2.1
6.1
2.4
0.8
1.4
43#
58
19
2
9
# Shells

Profile Described By: Bruce Nicholson, 1978.
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