Your gateway to a wide range of natural resources information and associated maps

Victorian Resources Online

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:
  • Strong texture contrast between surface (A) horizons and subsoil (B21) horizon.
  • Subsoil calcareous throughout, surface horizons non-calcareous.
  • Very many fine-earth carbonates at 55 cm depth.
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.
Page top