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    1. Catchment Management Regions
      1. Mallee Region
        1. Landform
        2. Land Use
        3. Soil
          1. Soils of the Mallee
          2. Soils of the Birchip Region
          3. Soils of the Mallee Research Station
          4. Soils of the Nangiloc-Colignan Area
          5. Mallee Soil Pits
        4. Land and Water Management
  2. Soil and Land Survey Directory
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ORZC8

Location: Birchip
Australian Soil Classification:
General Landscape Description: Low riseSite Description: Ploughed cropping paddock
Geology: Quaternary (Woorinen Formation)


Soil Profile Morphology:

Surface Soil

Ap0-15 cmDark reddish brown (5YR3/3); sandy clay loam; firm consistence (dry); some coarse platy structure at base of horizon; soft surface condition; slightly calcareous; pH 8.1; clear change to:
ORZC8 Profile
ORZC8 Profile
    Subsoil
B2115-30 cmRed (2.5YR5/6); light medium clay (sandy); weak very coarse prismatic, parting to strong coarse blocky structure; strong consistence, dry; pH 8.7; clear change to:
B2230-50 cmReddish yellow (5YR6/8); medium clay (sandy); weak to moderate very coarse prismatic, parting to moderate coarse blocky structure; strong consistence, dry; few (10%) fine earth carbonates; highly calcareous; pH 9.5; gradual and wavy change to:
B23k50-100 cmReddish yellow (5YR6/8); light medium clay; weak-moderate coarse polyhedral structure; very firm consistence, dry; very many (50%) fine earth carbonates; pH 9.8; clear change to:
B24100+ cmReddish yellow (7.5YR6/8) with few light grey (10YR1/2) mottles; medium clay; moderate medium to fine polyhedral structure; weak consistence, moist; pH 9.5.


Key Profile Features:

Soil Profile Characteristics:

pH
Salinity Rating
Surface
(A1 horizon)
Moderately Alkaline
Low
Non-Sodic
None
Upper Subsoil
(15-30 cm)
Strongly Alkaline
Low
Sodic
None1
Deeper subsoil
(at 50-100 cm)
Extremely Alkaline
Low-Medium
Strongly Sodic
None1
Deeper Subsoil
(at 100+ cm)
Extremely Alkaline
Medium
Strongly Sodic
Strong
    1moderate - strong dispersion after remoulding
ORZC8 pHORZC8 salinityORZC8 salinityORZC8 clay
Horizon
Horizon Depth
pH (water)
pH CaCl2
EC
1:5
NaCl
Exchangeable Cations
Ca
Mg
K
Na
Meq/100g
Ap
0-15
8.1
7.7
0.33
0.01
17
4.6
1.9
0.6
B21
15-30
8.7
8.1
0.44
<0.01
13
11
0.8
3.2
B22
30-50
9.5
8.5
0.47
<0.01
7.6
14
0.9
5.4
B23k
50-100
9.8
9.3
0.61
0.02
3.7
12
1.1
7.6
B24
100+
9.5
8.9
0.86
0.05
3
12
1.7
10

Horizon
Horizon Depth
Boron
mg/kg
Field
pF2.5
g/100g
Wilting Point
pF4.2
g/100g
Coarse Sand
(0.2-2.0mm)
%
Fine Sand
(0.02-0.2mm)
%
Silt
(0.002-0.02mm)
%
Clay
(<0.002mm)
%
Ap
0-15
2.5
29.6
13.7
33.9
23.1
6.5
32
B21
15-30
3.8
38.7
19.8
29.8
18
20.5
28
B22
30-50
9.5
42.3
22.4
32
14.2
20.5
26
B23k
50-100
16
43.3
23.9
22.6
13.2
8.5
34
B24
100+
16
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