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WLRA015

WLRA - soil pit WLRA15- landscape
Long undulating cropped plains

    Site Code
WLRA15

    Location

Jeparit East Road, western Victoria

    Landform

Undulating plain

    Geology

Quaternary Woorinen Formation:
aeolian dune sand, calcareous clay

    Element

Hillslope

    Slope

2%

    Aspect

South

Horizon
Depth (cm)
Description
A1
0–5

Dark brown (7.5YR4/3); fine sandy loam; strong fine polyhedral structure; rough ped fabric; weak consistence, dry; highly calcareous; field pH 9.0; clear boundary to:
A3
5–22

Dark brown (7.5YR4/3); fine sandy clay; weak to moderate medium to fine angular blocky structure; rough ped fabric; weak consistence, dry; few calcareous segregations; moderately calcareous; field pH 9.5; clear boundary to:

B1
22–40

Yellowish red (5YR5/6); light clay; moderate fine subangular blocky structure; rough ped fabric; weak consistence, slightly moist; highly calcareous; field pH 9.5; clear boundary to:

B21
40–65

Yellowish red (5YR5/6); light medium clay; moderately fine angular blocky structure; rough and smooth ped fabric; firm consistence slightly moist; contains very few fine calcareous soft segregations; a few distinct mangans evident; highly calcareous; field pH 9.5; gradual boundary to:

B22
65–103

Reddish yellow (7.5YR6/6) with many very coarse prominent (2.5YR4/6) mottles; light medium clay; moderate to strong medium angular blocky, parting to fine subangular blocky structure; rough and smooth ped fabric; firm consistence, slightly moist; contains very few calcareous soft segregations; a few faint mangans evident; highly calcareous; field pH 9.5; gradual boundary to:

B23
103–125+
Pale brown (10YR6/3) with common very coarse prominent (2.5YR4/6) mottles; medium clay; moderate to strong medium angular blocky, parting to fine subangular blocky structure; rough and smooth ped fabric; firm consistence slightly moist; contains very few calcareous soft segregations; a few faint mangans evident; highly calcareous; field pH 9.5.

Management Considerations

  • High susceptibility to wind erosion
  • Alkaline subsoils with calcareous soft segregations, manganese coatings (mangans).
  • Minor subsoil constraint >65 cm as mottling and soil colour indicates slightly imperfect drainage.
  • Lighter surface soil with strong fine structure with weak resistance to breaking down makes it vulnerable to wind erosion without stubble and trash retention.
  • Possible slight to moderate soil structure decline susceptibility due to poorer structure and dispersibility in the subsoil.
  • Landform element, duneslope; moderate to well-drained site drainage.
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