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MP44

Location: Sutton.
Australian Soil Classification: Epihypersodic, Pedal, Hypercalcic, CALCAROSOL (loamy surface).
Geology: Quaternary alluvial & aeolian deposits.General Landscape Description: Gently undulating plain with subdued rises.
Site Description: Cropping paddock – low rise.

Photo: MP 44 landscape
Site MP44 Landscape


Soil Profile Morphology:

Surface Soil
Ap0-5 cmDark yellowish brown (10YR4/4); light sandy clay loam; soft surface condition; very weak to weak consistence (dry); highly calcareous; pH 8.6; abrupt change to:
Photo: MP 44 profile
Site MP44 Profile

A12
5-10 cm
Brown (7.5YR4/4); sandy clay loam; weak structure; firm consistence (dry); highly calcareous; pH 8.7; sharp change to:
Subsoil

B21
10-20 cm
Yellowish red (5YR5/8); light medium clay (sandy); weak-moderate coarse to medium polyhedral structure; very firm consistence (dry); few (5%) fine-earth carbonates and few (5%) calcareous nodules; macropores present; rough faced peds; very highly calcareous; pH 8.9; clear change to:

B22k
20-30 cm
Yellowish red (5YR5/8); light medium clay (sandy); moderate coarse to medium polyhedral structure (rough-faced peds); very firm consistence (dry); fine-earth carbonates and semi-hard calcareous nodules common (10%); macropores present; pH 9.1; gradual change to:

B23k
30-60 cm
Yellowish red (5YR5/8); light medium clay (sandy); moderate coarse to medium polyhedral structure; firm consistence (dry); very many (40%) fine-earth carbonates and semi-hard calcareous nodules; pH 9.5; gradual change to:

B24k
60-100 cm
Yellowish red (5YR5/8) with pale yellow (2.5Y7/4) mottles (in patches); sandy clay loam; weak structure; very firm consistence (dry); many (30%) fine-earth carbonates and few (5%) manganese flecks; pH 10.2; clear change to:

B25k
100-150 cm
Yellowish red (5YR5/8); medium clay; moderate coarse polyhedral structure; strong to very firm consistence (dry); many (30%) fine-earth carbonates nodules; pH 10.1.

Key Profile Features:
Soil Profile Characteristics:

pH
Salinity Rating
Surface
(Ap horizon)
Strongly Alkaline
Low
Non-Sodic
None1
Subsoil
(B21 horizon)
Strongly Alkaline
Low
Non-sodic
None
Deeper subsoil
(at 100-150 cm)
Extremely Alkaline
Low-Medium
Strongly Sodic
Strong
1 Strong dispersion after remoulding.
Photo: MP 44 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
0-5
8.6
8.0
0.16
23
2.6
2.1
0.17
2.7
15
7
42
31
8.0
12
A12
5-10
8.7
8.2
0.17
23
3.0
1.5
0.17
2.5
18
7
41
29
5.0
19
B21
10-20
8.9
8.3
0.15
24
3.6
1.2
0.19
2.3
19
9
43
24
4.0
22
B22k
20-30
9.1
8.4
0.14
24
5.2
0.77
0.31
2.6
22
10
38
21
22
13
B23k
30-60
9.5
8.7
0.17
21
7.7
0.75
0.98
5.7
23
11
36
21
22
18
B24k
60-100
10.2
9.1
0.43
<0.01
1.7
4.9
1.3
4.4
B25k
100-150
10.1
9.6
0.62
<0.01
2.2
7.9
2.1
8.8
Profile Described By: Mark Imhof, April 2004.
CC BY 4.0 AU

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