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ESAS10c

Location: Inverleigh

Australian Soil Classification: Vertic, Mottled-Subnatric, Grey SODOSOL

Land Use: Cropping.

Photo: ESAS10c Landscape
ESAS10c Landscape

Soil Profile Morphology:

Surface Soil

A10-20 cmFine sandy clay loam; pH 5.6; changing to:

Photo: ESAS10c Profile
ESAS10c Profile
A220-40 cmSandy clay loam; pH 5.9; wavy change to:

Subsoil

B2140–55 cmBrown (7.5YR4/2) with red (10R4/6) mottles; medium heavy clay; strong coarse blocky structure, parting to medium blocky structure, parting to fine blocky structure; pH 6.2; changing to:

B2255-100 cmLight brownish grey (2.5Y6/2) with brownish yellow (10YR6/6) mottles; heavy clay; strong very coarse prismatic, parting to moderate coarse blocky structure; small slickensides evident; contains a few (2%) soft manganiferous stains; dark stains along prismatic structure; pH 7.9.



Photo: ESAS10c Profile Variability
ESAS10c and ESAS10b Soil profile variability.
ESAS10c is on the left and ESAS10b is on the right.

Soil Profile Characteristics:


pH

Salinity Rating
Surface
(A1 horizon)
Moderately acid
Low
Sodic
None1
Subsoil
(B21 horizon)
Slightly acid
Low
Sodic
Slight2
Deeper Subsoil
(at 55-100 cm)
Slightly alkaline
Low
Strongly Sodic
Moderate2
1 Slight dispersion on remoulding. 2 Strong dispersion on remoulding.
Image: ESAS10c Graphs
The surface is moderately acid. The subsoil is slightly acid becoming slightly alkaline in the deeper subsoil.
The salinity rating for the whole profile is low.
    The soil profile becomes increasingly sodic with depth.
    Low clay content in the surface horizons, with a sharp increase in clay content at the subsoil boundary.

Horizon

Horizon Depth
(cm)

pH
(water)

pH
CaCl2

EC
(dS/m)
Exchangeable
Aluminium
mg/kg
Exchangeable Cations
Ca
Mg
K
Na
meq/100g
A1
0-20
5.6
4.9
0.11
<10
1.9
1
0.4
0.32
A2
20-40
5.9
4.6
0.1
26
1.2
2.1
0.24
1
B21
40-55
6.2
5.1
0.23
12
3.9
9.9
0.97
5
B22
55-100
7.9
6.7
0.22
3.4
9.1
0.6
5.4
Horizon
Horizon Depth
(cm)
Oxidisable Organic Carbon
%
Total
Nitrogen
%
Exchangeable Acidity
meq/100g
Field
Capacity
pF2.5
Wilting
Point
pF4.2
Coarse Sand
(0.2-2.0 mm)
Fine Sand
(0.02-0.2 mm)
Silt
(0.002-0.02 mm)
Clay
(<0.002 mm)
A1
0-20
0.83
0.067
4.6
15.8
4.7
36
38
10
15
A2
20-40
0.61
<0.05
5.8
17.0
8.4
35
30
12
20
B21
40-55
15
46.5
38.1
10
9
3
73
B22
55-100
37.9
19.0
24
21
9
42

Profile Described By: Mark Imhof (July 2008).
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