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MOP2

Location: Baxter

Aust. Soil Class: Endoacidc-Mottled, Self-mulching, Black VERTOSOL
General Landscape Description: Swampy depression between gently undulating rises.
Site Description: Melaleuca ericifolia vegetationGeology: Quaternary (Holocene) swamp deposits.

MOP1 and 2 Landscape
MP1 & 2 Landscape

Soil Profile Morphology:

Surface soil		MOP2 Profile
MP2 Profile
A10-12 cmBlack (10YR2/1); light clay; moderate, coarse to medium (10-50 mm) subangular blocky structure; self-mulching surface condition; cracks when dry pH 5.9:
Subsoil
B2112-25 cmBlack (10YR2/1); light clay; strong coarse to medium (10-50 mm) subangular blocky, parting to fine to very fine (2-10 mm) polyhedral structure; very firm consistence; pH 5.6:
B2225-50 cmBlack (10YR2/1); medium heavy clay; moderate, very coarse to coarse (50 - >100 mm) prismatic, parting to moderate, coarse to medium (10-50 mm) subangular blocky structure; pH 5.1:
B3150-95 cmGrey (10YR5/1) with brownish yellow (10YR6/8) and brown (7.5YR4/4) mottles; medium heavy clay; strong, medium to fine (5-20 mm) lenticular structure; pH 4.8:
B3295-120+ cmLight grey (2.5Y6/1) with reddish yellow (10YR6/6) mottles; medium heavy clay; strong, medium to fine (5-20 mm) lenticular structure; pH 4.6.
Key Profile Features:
  • Clay texture throughout
  • Surface cracking when dry
  • Distinct vertic properties (well developed lenticular structure)

    pH
    Salinity Rating
    Surface
    (A1 horizon)
    Moderately Acid
    Medium
    Marginally Sodic
    None
    Subsoil
    (B21 horizon)
    Moderately Acid
    High
    Non-Sodic
    None
    Deeper subsoil
    (at 95-120 cm)
    Very Strongly Acid
    Extremely High
    Marginally Sodic
    None
Soil Profile Characteristics:

MOP2 Graphs



Horizon
Horizon Depth
pH
(water)
pH
CaCl2
EC 1:5
Exchangeable Cations
Ex Al
mg/kg
Ex Ac
meq/100g
Field
pF2.5
Wilting Point
pF4.2
Coarse Sand
(0.2-2.0mm)
Fine Sand
(0.02-0.2mm)
Silt
(0.002-0.02mm)
Clay
(<0.002mm)
Ca
Mg
K
Na
meq/100g
A1
0-12
5.9
5.5
0.39
3.8
6.7
0.2
2.0
21
20
49.3
23.6
8
21
19
34
B21
12-25
5.6
5.2
0.61
4.6
5.2
0.1
1.4
55
19
42.8
20.1
6
26
22
33
B22
25-50
5.1
4.6
0.61
2.5
6.9
<0.1
1.1
57
12
31.2
15.9
7
32
14
39
B31
50-95
4.8
4.5
1.1
1.7
4.0
<0.1
0.9
42
8.7
30.2
15.7
6
37
15
39
B32
95-120+
4.6
4.4
2
1.9
4.9
<0.1
1.0
70
10

Notes: Soil profile described by Mark Imhof and Ian Sargeant (November 2006).
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