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Top Crop1a

WLRA - soil pit Topcrop 1a- landscape
Slight rise on undulating plain
    Site Code
Top Crop1a
WLRA - soil pit Topcrop 1a- profile
Hypercalcic, Subnatric, Red Sodosol

    Location

Brim, western Victoria.

    Landform

Undulating Plain

    Geology

Quaternary Woorinen Formation: aeolian dune sand, calcareous clay

    Element

Slight rise

    Slope

0–2%

    Aspect

–
Horizon
Depth (cm)
Description

Ap

0–12

Dark brown (7.5YR3/4) sandy clay loam; weak structure; very weak to weak consistence (dry), becoming firm at base of horizon; slight hardpan at base of horizon (9–12 cm depth); non-calcareous; pH 7.1; sharp boundary to:

B21

12–25

Dark red (2.5YR4/6 and 2.5YR4/8) medium heavy clay; strong coarse blocky, parting to moderate medium blocky structure; prismatic structure at base of horizon; strong consistence (dry); non-calcareous; pH 8.8; clear boundary to:

B22

25–40

Yellowish red (5YR5/6) light medium clay; moderate coarse prismatic, parting to strong coarse blocky structure; very firm to strong consistence (dry); few (5%) soft calcareous segregations; highly calcareous; pH 9.3; gradual boundary to:

B23k
40–90

Yellowish red (5YR5/8) light medium clay; moderate coarse polyhedral, parting to medium polyhedral structure; strong consistence (dry); very many (50%) soft calcareous segregations; very highly calcareous; pH 9.7.

B24k
90+
Yellowish red (5YR5/8) light clay; weakly structured; strong consistence (dry); very many (50%) soft calcareous segregations; pH 9.6.
Management considerations
  • Strong texture contrast between surface (A) horizons and subsoil (B21) horizon
  • Large amounts of calcium carbonate in deeper subsoil (from 40 cm depth)
Site
Top Crop1a
Sample depth cm
pH
EC
dS/m
NaCl
%
Ex Ca
cmol-/kg
Ex Mg
cmol-/kg
Ex K
cmol-/kg
Ex Na
cmol-/kg
Ex Al
mg/kg
Ex acidity
cmol-/kg
FC
-30okPa
PWP
-1500okPa
KS
%
FS
%
Z
%
C
%
Horizon
H2O
CaCl2
Ap
0–12
7.1
6.6
0.14
NA
7
2.1
1.1
0.28
NA
NA
12.3
6
38.2
36
6
14
B21
12–25
8.8
8.1
0.39
<0.01
12
11
1.2
3.2
NA
NA
38.5
20.6
24.9
24.1
10.5
38.5
B22
25–40
9.3
8.5
0.47
0.02
7.6
9.7
0.9
3.9
NA
NA
35.2
19.2
26.3
24.1
13.5
24.5
B23k
40–90
9.7
8.6
0.58
0.04
3.9
8.9
1
5.1
NA
NA
34.7
18.4
29.2
21.6
4
28
B24k
90+
9.6
8.7
1
0.13
2.8
8.4
1.1
6.3
NA
NA
29.1
15.7
NA
NA
NA
NA
Note: NA=not assessed
CC BY 4.0 AU

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The content is provided under the Creative Commons Attribution 4.0 Australia licence (CC BY 4.0 AU).

This material is presented in an archived form and is no longer maintained or updated. It is provided for general information only and should not be relied upon as current advice.

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