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ESAS9

Location: Mingay

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

General Landscape Description: Gently undulating plain.
Site Description: Raised bed (2 metre wide) cropping paddock. Gilgai micro relief present.
Geology: Quaternary Basalt.

Photo: ESAS9 Landscape
ESAS9 Landscape


Soil Profile Morphology:

Surface Soil

A10-12 cm Dark greyish brown (10YR4/2); hardsetting and crusting in the surface; fine sandy clay loam; moderate coarse blocky, parting to medium blocky structure; significant amount of buckshot present; pH 5.9:
Photo: ESAS9 Profile
ESAS9 Profile


A212-20/40 cmBrown (10YR5/3) conspicuously bleached (10YR7/1d); fine sandy clay loam; fine polyhedral structure; pH 5.9; wavy change to:

NOTE: depth to subsoil varies due to gilgai.
Subsoil

B2120/40-50 cmDark grey (10YR4/1) with strong brown (7.5YR4/6) mottles; heavy clay; coarse blocky structure; vertic shrink/swell properties; pH 7.1:
B2250-75 cmYellowish brown (10YR5/4); heavy clay; lenticular structure; pH 7.8:
B2375-110 cmLight yellowish brown (2.5Y6/4); heavy clay; coarse lenticular, parting to fine lenticular structure; slickensides evident; pH 8.7.

Soil Profile Characteristics:


pH


Salinity Rating
Surface
(A1 horizon)
Moderately Acid
Low
Non-Sodic
None
Subsoil
(B21 horizon)
Slightly Alkaline
Low
Strongly Sodic
Strong1
Deeper subsoil
(at 80-120 cm)
Strongly Alkaline
Medium - High
Strongly Sodic
Strong2
1 Complete dispersion after remoulding. 2 Moderate dispersion after remoulding.

Image:  ESAS9 Graphs
The surface is moderately acid. The subsoil is slightly alkaline and the deeper subsoil is strongly alkaline.The salinity rating in the surface is low. The subsoil has a medium to high salinity rating.The surface is non-sodic.
The subsoil is strongly sodic.
    The clay content increases significantly at the subsoil boundary.

Horizon
Horizon Depth
(cm)
pH
(water)
pH
(CaCl2)
EC
dS/m
NaCl
%
Exchangeable Cations
Ca
Mg
K
Na
meq/100g
A1
0-12
5.9
5.4
0.17
7
2.9
0.38
0.73
A2
12-40
5.9
5.0
0.07
2.3
1.4
0.11
0.48
B21
40-50
7.1
5.9
0.22
6
8.9
0.41
5.3
B22
50-75
7.8
6.7
0.32
0.04
6.6
10
0.32
6.7
B23
75-110
8.7
8.3
1.3
0.2
7.9
14
0.37
11


Horizon
Horizon Depth
(cm)
Oxidisable Organic Carbon
%
Exchangeable Aluminium
mg/kg
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
0-12
2.2
<10
7.2
24.8
11.4
17
41
11
26
A2
12-40
<10
3.9
17.5
5.9
26
44
6
23
B21
40-50
39.9
20.5
5
33
12
46
B22
50-75
34.5
24.9
5
33
16
44
B23
75-110
46.0
24.3


Profile Described By: Mark Imhof (March 2008).
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