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ESAS14

Location: Minimay

Australian Soil Classification: Vertic, Mesonatric, SODOSOL

General Landscape Description: Level plan.

Site Description: Continuous cropping paddock under a centre pivot. Lower yielding area when compared to ESAS13.



Soil Profile Morphology:

Surface Soil

Ap0-15 cm Sandy clay loam; firm surface condition; pH 7.9:

Subsoil

B2115-35 cm Light clay; strong medium prismatic, parting to strong medium angular blocky structure; a few distinct slickensides evident; pH 8.9:

B2235-50 cmLight medium clay; strong medium prismatic, parting to strong medium angular blocky structure; pH 9.1:

B2350-80 cmMedium clay; strong medium prismatic, parting to strong fine prismatic structure; strong consistence, moist; few distinct slickensides evident; pH 9.6:

B2480-100 cmMedium clay; pH 9.6:

B25100+ cmMedium clay; pH 9.4.



Soil Profile Characteristics:



pH

Salinity Rating
Surface
(A1 horizon)
Slightly Alkaline
Medium
Sodic
Moderate
Subsoil
(B21 horizon)
Strongly Alkaline
Medium to High
Strongly Sodic
Strong 1
Deeper Subsoil
(at 80-100 cm)
Extremely Alkaline
High
Extremely Sodic
Nil 2
1 Complete dispersion after remoulding. 2 Slight to moderate dispersion after remoulding.

Image: ESAS14 Graphs
The surface is slightly alkaline. The upper subsoil is strongly alkaline becoming extremely alkaline with depth.The salinity rating for the surface is medium. The subsoil has a medium to high salinity rating.
The surface is sodic. The upper subsoil is strongly sodic becoming extremely sodic with depth.The clay content increases significantly at the A/B boundary.Boron levels are fairly consistent throughout the profile.

Chemical and Physical Analysis:

Horizon
Horizon Depth
(cm)
pH
(water)
pH
(CaCl2)
EC
dS/m
Chloride
mg/kg
Exchangeable Cations
Ca
Mg
K
Na
meq/100g
Ap
0-15
7.9
7.4
0.44
0.032
11
7.3
1
2.6
B21
15-35
8.9
8.3
0.79
0.109
11
16
0.97
7.6
B22
35-50
9.1
8.6
0.96
0.126
8.6
18
1.1
10
B23
50-80
9.6
8.9
0.94
0.12
4
12
0.81
9.7
B24
80-100
9.6
8.9
0.91
0.118
4.2
11
0.85
11
B25
100+
9.4
8.7
1.1
0.159
6.5
13
0.92
13

Horizon
Horizon Depth
(cm)
Oxidisable Organic Carbon
%
Total
Nitrogen
%
Boron
%
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)
Ap
0-15
1.7
0.15
27.8
15.1
18
32
10
33
B21
15-35
7.5
45.0
21.6
12
21
8
53
B22
35-50
10
51.8
24.0
11
19
9
54
B23
50-80
9.3
38.4
18.7
B24
80-100
8.3
40.6
18.3
B25
100+
8.2
44.0
20.0

Profile Described By: Bernard Noonan and Melissa Cann (March 2009).
CC BY 4.0 AU

This page contains material sourced from the Victorian Resources Online (VRO) website, originally published by the State Government of Victoria.

The content is provided under the Creative Commons Attribution 4.0 Australia licence (CC BY 4.0 AU).

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