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LWA3

Location: WalpeupAustralian Soil Classification: Epibasic, Pedal, Hypercalcic CALCAROSOL
General Landscape Description: Swale between east-west dunesSite Description: Landcare delivery site
Geology: Quaternary aeolian deposits (Woorinen Formation)

LWA3 landscape
LWA3 Landscape

Soil Profile Morphology:

Surface Soil

A110-6 cmDark brown (7.5YR3/4); loamy sand; loose; pH 7.5; clear change to:

LWA3 profile
LWA3 Profile
A126-10 cmBrown (7.5YR384); loamy sand; loose; weak consistence (dry); pH 6.8; clear change to:

A1310-14 cm Dark brown (7.5YR3/4); sandy loam (clayey); firm to very firm consistence (dry); some compaction; pH 7.2; sharp change to:

A214-28 cmReddish brown (5YR4/4); sandy loam (clayey); firm to very firm consistence (dry); hard surface; pH 7.8; slightly calcareous; abrupt change to:


Subsoil

B128-35 cmYellowish red (5YR4/6); sandy clay loam; weak to moderate coarse to medium (10-50 mm) blocky; macropores present; pH 8.7; gradual change to:

B2135-50 cmRed (2.5YR4/6); light clay (sandy); weak coarse (50-100 mm) prismatic, parting to moderate to strong coarse (20-50 mm), and moderate to strong medium to fine (5-20 mm) subangular blocky structure; firm consistence (slightly moist); pH 9.3; gradual change to:

B22 50-65 cmYellowish red (5YR4/6); light clay (sandy); moderate strong to medium (10-50 mm) subangular blocky structure; strong consistence (dry); few (5%) soft carbonate nodules; pH 9.5; gradual change to:

B23k 65-100 cmYellowish red (5YR5/6); light medium clay (sandy); weak to moderate strong to medium (10-50 mm), parting to moderate fine (5-10 mm) subangular blocky structure; very many (40%) fine earth carbonates and carbonate/silica nodules (5-20 cm); pH 9.8; gradual change to;

B24k 100-140+ cmWeak to moderate coarse (20-50 mm) subangular blocky, parting to weak to moderate medium to fine (5-20 mm) subangular blocky structure; many (20%) fine-earth carbonates and semi-hard calcareous nodules; pH 9.8.


Key Profile Features:


Soil Profile Characteristics:

pH
Salinity Rating
Surface
(Ap horizon)
Slightly alkaline
Low
Non-sodic
None
Subsoil
(B21 horizon)
Very strongly alkaline
Medium
Strongly sodic
Moderate1
Deeper subsoil
(at cm)
Extremely alkaline
High
Strongly sodic
Complete
    1 Strong dispersion after remoulding.

LWA3 graphs

Horizon
Horizon Depth
pH (water)
pH CaCl2
EC
1:5
Org. Carbon
mg/kg
Exchangeable Cations
Ca
Mg
K
Na
Meq/100g
A11
0-6
7.5
7.2
0.18
0.77
4.2
1.2
1.1
0.2
A12
6-10
6.8
6.4
0.08
0.43
3.9
1.1
1.1
0.2
A13
10-14
7.2
6.7
0.08
0.38
5.4
1.5
1.3
0.2
A2
14-28
7.8
7.2
0.07
4.6
1.2
0.8
0.2
B1
28-35
8.7
7.6
0.10
8.0
4.5
0.9
1.9
B21
35-50
9.3
8.5
0.42
7.1
9.6
1.3
6.0
B22
50-65
9.5
8.7
0.49
B23K
65-100
9.8
8.9
0.63
B24K
100-140
9.8
8.8
0.67

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)
%
A11
0-6
0.9
8.6
2.4
55
34
5
6
A12
6-10
0.7
9.7
2.3
50
38
6
6
A13
10-14
0.9
11.6
3.3
51
33
7
8
A2
14-28
1.2
16.6
3.2
47
36
8
9
B1
28-35
1.6
21.6
7.6
43
25
9
20
B21
35-50
5.5
36.3
17.8
31
20
13
32
B22
50-65
11.0
37.4
18.3
32
18
11
31
B23K
65-100
19.0
35.2
19.3
B24K
100-140
< 0.3


Management Considerations:


Note:

  • Soil characterised by Mark Imhof Jan 07
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