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ESAS12b

Location: Patchewollock

Australian Soil Classification: Haplic, Hypercalcic, Red KANDOSOL

General Landscape Description: Sand dune within the north-south ridge. Gently undulating rises. Relict lunette.
Site Description: Mid slope.
Geology: Neogene (Tertiary) sediments; (Quaternary) aeolian sediments (Woorinen Formation).
Land Use: Cereal cropping.


Image: ESAS12b Landscape 2

ESAS12b Landscape


Soil Profile Morphology:

Surface Soil

Ap0-10 cm Dark reddish brown (5YR3/3); light sand; loose surface condition; massive; weak consistence (dry); pH 6.9; abrupt change to:

Image: ESAS12b Profile ESAS12b Profile
A1210-15 cmReddish brown (5YR4/3); light sand; massive; weak consistence (moderately moist); pH 6.1; abrupt change to:
Subsoil

B2115-20 cm Dark brown (7.5YR3/4); clayey sand; weak coarse to medium blocky structure; firm to very firm consistence (moderately moist); pH 6.9; abrupt change to:

B2220-30 cm Dark reddish brown (5YR3/3); sandy loam (clayey); weak coarse to medium blocky structure; firm consistence (moderately moist): slightly calcareous; pH 7.2; clear change to:

B2330-45 cmDark red (2.5YR3/6) with many (20%) faint medium red (2.5YR4/6) mottles; sandy clay loam; weak coarse to medium blocky structure; firm to very firm consistence (moderately moist); slightly calcareous; pH 7.7; gradual change to:

B2445-55 cmDusky red (2.5YR4/4) with faint coarse red (2.5YR4/8) mottles common (10-20%); light clay (sandy); weak to moderate coarse to medium blocky structure; weak consistence (moderately moist); moderately calcareous; pH 8.3; clear change to:

B25k55-80 cmRed (2.5YR5/6); heavy sandy clay loam; firm consistence (moderately moist); many (40%) soft calcareous segregations, some semi-hard; pH 8.6; clear change to:

B2680-110 cmDark red (2.5YR4/8) with many distinct medium light brown (7.5YR6/4 dry); light clay (sandy); moderate coarse to fine angular blocky structure; very firm to strong (dry) consistence; slight amount (10%) of soft and semi-hard calcareous segregations; pH 8.8:

B27k110+ cmVery many (>80%) soft and semi-hard coarse (5-15mm) calcareous segregations present; pH 9.2.


Key Profile Features:
    • Sandy profile throughout.
    • Strongly alkaline deeper subsoil.
    • Boron toxicity in the deeper subsoil.

Soil Profile Characteristics:


pH


Salinity Rating
Surface
(Ap horizon)
Slightly Acidic
Low
Non-Sodic
None
Subsoil
(B21 horizon)
Slightly Acidic
Very Low
Non-Sodic
None1
Deeper Subsoil
(at 100 cm)
Strongly Alkaline
Low
Non-Sodic
-
1Moderate dispersion remoulded.

Graphs: ESAS12b graphs
The surface and upper subsoil is slightly acidic becoming strongly alkaline at depth.The salinity rating is low throughout the profile.There was no boron detected in the surface. The upper subsoil has low boron levels becoming toxic to some plant species roots at about 1 metres depth.The clay content is low throughout the profile.

Horizon
Horizon Depth
(cm)
pH
(water)
pH
(CaCl2)
EC
(dS/m)
NaCl
%
Ca
Mg
K
Na
meq/100g
Ap
0 - 10
6.9
6.7
0.12
3.00
0.71
0.64
0.07
A12
10-15
6.1
5.4
0.04
2.43
0.58
0.56
0.05
B21
25 - 20
6.9
6.3
0.05
4.18
0.98
0.72
0.05
B22
20 - 30
7.2
6.5
0.05
6.35
1.47
0.84
0.06
B23
30 - 45
7.7
7.0
0.06
8.98
2.55
0.63
0.11
B24
45 - 55
8.3
7.8
0.13
15.58
3.88
0.46
0.18
B25k
55 - 80
8.6
8.0
0.13
19.66
4.52
0.40
0.26
B26
80-110
8.8
8.1
0.15
B27k
110+
9.2
8.3
0.25
19.88


Horizon
Horizon Depth
(cm)
Total
Nitrogen
%
Organic Carbon
%
Available Boron
mg/kg
Field
Capacity
pF2.5
Wilting
Point
pF4.2
Coarse Sand
(0.2- 2.0 mm)
Fine Sand
(0.02- 0.2 mm)
Silt
(0.002- 0.02 mm)
Clay
(<0.002 mm)
Ap
0 - 10
0.04
0.78
6
2.3
58
33
1
3
A12
10-15
0.02
0.36
6.9
2.2
56
35
1
4
B21
25 - 20
0.01
0.43
14.4
4.3
47
36
5
9
B22
20 - 30
0.94
16.4
4.6
46
35
5
14
B23
30 - 45
1.16
19.8
6.8
47
28
7
16
B24
45 - 55
1.52
19.5
9.9
43
24
6
23
B25k
55 - 80
1.86
21.7
10.3
33
27
6
22
B26
80-110
B27k
110+
13.01


Profile Described By: Mark Imhof and Melissa Cann (August 2008).

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