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MP43

Location: Berriwillock.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 on slight rise.

Photo:  MP 43 landscape
Site MP43 Landscape


Soil Profile Morphology:

Surface Soil

Ap0-10 cmYellowish red (5YR4/6); light sandy clay loam; soft surface condition; very weak to weak consistence (dry); clear change to; moderately calcareous; pH 8.4; clear change to:
Photo:  MP 43 profile
Site MP43 Profile
Subsoil

B1

10-15 cm

Yellowish red (5YR4/6);
sandy clay loam; firm consistence (dry); pH 9.1; clear change to:

B21k

15-25 cm

Reddish brown (5YR4/4) with reddish yellow (5YR6/8) mottles;
light medium clay; moderate-strong very coarse prismatic, parting to weak-moderate coarse blocky structure; firm to very firm consistence (dry); fine-earth carbonates common (15%); pH 9.6; gradual change to:

B22k

25-60 cm

Yellowish red (5YR5/6);
light medium clay; strong-medium fine polyhedral structure; very firm consistence (dry); many (40%) fine-earth carbonates; gradual change to; pH 10.1; gradual change to:

B23k

60-100 cm

Yellowish red (5YR5/8);
light medium clay; strong consistence (dry); very many (60%) fine-earth carbonates; gradual change to; pH 10.1; gradual change to:

B24

100-130 cm

Yellowish red (5YR5/6); few (5%) manganese flecks; pH 9.7.


Key Profile Features:
  • Gradual increase in texture (clay percentage) with depth down the soil profile.
  • Many fine-earth carbonates in subsoil.
Soil Profile Characteristics:

pH
Salinity Rating
Surface
(Ap horizon)
Moderately Alkaline
Low-Medium
Non-Sodic
None
Subsoil
(B21 15-25 cm horizon)
Very Strongly Alkaline
Low
Sodic
None1
Deeper subsoil
(at 100-130 cm)
Extremely Alkaline
High
Strongly Sodic
-
1 Strong dispersion after remoulding (noted in field).

Photo:  MP 43 pH
Photo:  MP 43 salinity
Photo:  MP 43 sodicity

Photo:  MP 43 clay

Photo:  MP 43 boron

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
8.4
8.1
0.55
<0.01
13
5.2
1.8
0.4
3.1
22
10
32
30
17
13
B1
10-15
9.1
8.4
0.24
24
7.2
1.5
1.6
4.6
25
12
30
30
17
18
B21
15-25
9.6
8.7
0.30
<0.01
10
11
1.9
3.4
9.6
36
18
21
19
17
23
B22k
25-60
10.1
9.2
0.66
0.05
2.2
9.1
1.8
6.7
28
35
18
21
17
3
35
B23k
60-100
10.1
9.8
0.83
0.09
2.0
8.1
1.6
7.7
27
B24
100-130
9.7
9.6
1.1
0.14
2.4
10
2.0
8.9

Profile Described By: Mark Imhof, April 2004.
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