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MP45

Location: Watchupga.
Australian Soil Classification: Hypercalcic, Subnatric, Red, SODOSOL (loamy surface).
Geology: Quaternary alluvial and aeolian deposits (Woorinen Formation).General Landscape Description: Plain with sandy rises.
Site Description: Cropping paddock (wheat, vetch).

Photo: MP 45 landscape
Site MP45 Landscape


Soil Profile Morphology:

Surface Soil
Ap0-10 cmDark reddish brown (5YR3/3); light sandy clay loam; soft surface condition; weak consistence (dry); non-calcareous; pH 7.4; clear change to:
Photo: MP 45 profile
Site MP45 Profile

A12
10-15 cm
Dark reddish brown (5YR3/3); sandy clay loam; massive; very firm to strong consistence (dry); forms a hardpan; non-calcareous; pH 8.1; sharp change to:

Subsoil

B21
15-30 cm
Yellowish red (5YR5/8); medium heavy clay; strong coarse to medium subangular blocky structure; strong consistence (dry); few (5%) fine-earth carbonates; moderately calcareous; pH 9.1; gradual change to:

B22k
30-55 cm
Yellowish red (5YR5/8); medium clay; moderate coarse to medium subangular blocky structure; many (20%) fine-earth carbonates; pH 9.5 gradual change to:

B23k
55-100 cm
Light grey (10YR7/2) with many (40%) yellowish red (5YR5/8) mottles; medium clay; moderate very coarse to coarse polyhedral structure; very many (60%) fine-earth carbonates and few (5%) calcareous-siliceous nodules (10-40 mm); pH 9.9; gradual change to:

B24k
100-140 cm
Yellowish red (5YR5/8) with light grey (10YR7/2) mottles; medium clay; many (30%) fine-earth carbonates and few (5%) calcareous-silica nodules (10-20 mm); pH 9.9.

Key Profile Features:
 Soil Profile Characteristics:

pH
Salinity Rating
Surface
(Ap horizon)
Slightly Alkaline
Low
Non-Sodic
None1
Subsoil
(B21 horizon)
Very Strongly Alkaline
Low
Sodic
Some2
Deeper subsoil
(at 100-140 cm)
Extremely Alkaline
High
Strongly Sodic
Moderate-Strong
1Moderate dispersion after remoulding.
2Strong dispersion after remoulding

Photo: MP 45 graphs

Horizon
Horizon Depth
(cm)
pH
(water)
pH (CaCl2)
EC
1:5
NaCI
%
Exchangeable Cations
Boron
(CaCl2)
mg/kg
Field
Capacity
pF2.5
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
Ap
0-10
7.4
7.0
0.18
6.9
2.5
1.2
0.26
1.5
14
6
46
33
4
15
A12
10-15
8.1
7.4
0.17
6.9
3.0
0.87
0.91
1.8
15
7
43
32
3
21
B21
15-30
9.1
8.3
0.30
0.01
13
10
1.8
3.0
5.2
40
19
31
14
3
48
B22k
30-55
9.5
8.7
0.49
0.03
9.2
13
1.8
5.1
14
47
22
23
12
3
51
B23k
55-100
9.9
9.6
0.79
0.05
2.8
13
1.8
8.9
24
B24k
100-140
9.9
9.5
0.93
0.11
2.4
9.6
1.7
9.0

Notes: Most roots evident to 45 cm depth.

Profile Described By: Mark Imhof, April 2004.
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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