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WLRA131

WLRA - soil pit WLRA131- landscape
    Site Code
WLRA131
WLRA - soil pit WLRA131- profile
Sodic, Hypercalcic, Red CHROMOSOL

    Location

Jeparit Road Peppers Plains, Warracknabeal, Western Victoria

    Landform

Undulating plain

    Geology

Quaternary Woorinen Formation: aeolian dune sand, calcareous clay

    Element

Mid slope

    Slope

1%

    Aspect

South-west

Horizon
Depth (cm)
Description

A11

0–5

Dark brown (10YR3/3); sandy loam; moderate medium to very fine polyhedral structure; rough ped fabric; weak consistence dry; pH 7.7; smooth and abrupt change to:

A12

5–15

Dark brown (7.5YR3/2); loam; massive (structureless); earthy ped fabric; firm consistence, dry; weakly cemented cultivation pan evident; pH 7.5; abrupt and wavy change to:

B21

15–35

Yellowish red (5YR4/5); light medium clay; strong coarse prismatic, parting to medium angular blocky structure; smooth ped fabric; strong consistence dry; contains very few fine manganiferous nodules; pH 8.5; gradual and smooth change to:

B22k

35–75

Reddish yellow (7.5YR6/6) with a few faint fine red mottles; light clay; weak coarse polyhedral structure; rough ped fabric; firm consistence, moderately moist; contains very many extremely coarse calcareous soft segregations, very few medium calcareous nodules and argillaceous tubules; pH 9.1; diffuse and smooth change to:

B23k

75–135

Reddish yellow (7.5YR7/6); light clay; weak medium to coarse polyhedral structure; rough ped fabric; weak consistence moderately moist; contains many extremely coarse calcareous soft segregations and a few fine manganiferous fragments; pH 9.9.

Management Considerations

  • High susceptibility to wind erosion.
  • Alkaline subsoils with calcareous soft segregations and nodules, manganese flecks and argillaceous (clayey) tubules.
  • Plough pan at top of the A12 horizon (5-15 cm).
  • Medium to very fine roots observed to 50 cm.
  • Possible slight to moderate soil structure decline susceptibility due to poorer structure and dispersibility in the subsoil.

Horizon
Depth (cm)
pH (water)
pH (CaCl2)
EC
dS/m
Exchangeable Cations
cmol-/kg
Ca
Mg
K
Na
A11
0-5
7.7
7.3
0.19
13
3.8
2
0.29
A12
5-15
7.5
7.1
0.12
13
4.2
1.6
0.45
B21
15-35
8.5
8
0.18
15
7.7
1.6
0.98
B22k
35-75
9.1
8.5
0.51
8.5
12
2
3.6
B23k
75-135
9.9
9.4
0.66
2.6
11
2.2
7.1
CC BY 4.0 AU

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