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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
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