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MP38a

Location:

Walpeup

Australian Soil Classification: Sodic, Hypercalcic, Red CHROMOSOL (medium sandy surface)

General Landscape Description: Swale between east-west dune.
Geology: Quaternary (Woorinen Formation) deposits.
Land Use: Cropping.

Image: MP38 and MP39 landscape
MP38 and MP39 Landscape


Soil Profile Morphology:

Surface Soil
A110-20 cmStrong brown (7.5YR4/6); loamy sand; weak blocky structure; very weak consistence dry; non calcareous; pH 7.9:
MP38a profile
MP38a Profile
A1220-25 cmDark brown (7.5YR3/4); sandy loam; weak coarse blocky structure; non calcareous; pH 8.1:
Subsoil
B2125-43 cmYellowish red (5YR4/6); sandy clay; weak coarse blocky structure; very firm consistence dry; moderately calcareous; pH 8.6:
B22k43-50 cmYellowish red (5YR5/8); light medium clay; very firm consistence dry; contains a few (2%) hard carbonates and a common (20%) amount of soft carbonate; very strongly calcareous; pH 8.9;
B23k50+ cmYellowish red (5YR5/8); light clay becoming light clay (sandy) with depth; weak coarse polyhedral structure; strong consistence dry; contains a few (2-5%) hard carbonates (5 mm in size) and very many (>50%) soft carbonates; very strongly calcareous; pH 9.6.
Soil Profile Characteristics:

pH
Salinity Rating
Surface
(A1 horizon)
Slightly Alkaline
Very Low
Non Sodic
__
Subsoil
(B21 horizon)
--
--
Non Sodic
--
Deeper Subsoil
(at 50 cm)
--
--
--
--
1 Moderate dispersion after remoulding.

Image: MP38a graphs
The profile is non-sodic to 40 cm depth.There is a moderate increase in clay content at the A/B horizon boundary.

Horizon
Horizon Depth
(cm)
pH
(water)
pH
(CaCl2)
EC
1:5
Exchangeable Cations
Total Nitrogen
%
Organic Carbon
%
Wilting Point
pF4.2
Coarse Sand
(0.2 - 2 mm)
Fine Sand
(0.02 - 0.2 mm)
Silt
(0.002 - 0.02 mm)
Clay
(<0.002 mm)
Ca
Mg
K
Na
meq/100g
A11
0-20
7.9
7.3
0.05
2.9
1
0.6
0.1
0.06
0.29
2.6
33
59
0
8
A12
20-25
6.5
1.6
1.1
0.1
5.6
37
44
4
16
B21
25-40
9.1
5.3
1
0.6
11.2
36
32
3
32
B22k
40-50
12
35
31
3
29

Profile Described By: Mark Imhof and Nathalie Baxter (September 1996).
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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