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LS26

WLRA - soil pit LS26- landscape
Dune crest on a dunefield south of the Big Desert
    Site Code
LS26
WLRA - soil pit LS26- profile
Calcic, Mottled-Subnatric, Yellow Sodosol

    Location

Yanac, western Victoria

    Landform

Dune

    Geology

Quaternary Woorinen Formation: aeolian dune sand, calcareous clay over Pliocene Parilla Sand: marine sand and silt

    Element

Dunecrest
Horizon
Depth (cm)
Description

A1

0–10

Light yellowish brown (10YR6/4); loamy sand; weakly structured; pH 7.7.

A2

10–15

Light yellowish brown (10YR6/4); conspicuously bleached fine sand; pH 8.6; sharp and wavy boundary to:

B21

15–30

Light yellowish brown (10YR6/4) with (10YR6/6) mottles; coarse sandy clay loam; weak to moderate coarse columnar structure with hard bleached capping; strong consistence (dry); pH 8.9; clear and wavy boundary to:

B22k

30–60

Light yellowish brown (10YR6/4) with (5YR5/6) mottles; light medium clay (sandy); moderate coarse prismatic, parting to strong coarse blocky structure; ped faces may have a discontinuous carbonate coating; pH 9.4.

B31

60–100

Red (2.5YR4/8) with (7.5YR5/6) mottles; coarse sandy clay loam; massive (structureless); strong consistence (dry); contains few (5%) calcareous nodules; pH 9.6.

B32

100–150

Light yellowish brown (10YR6/4) with (5YR5/6) mottles; medium clay (sandy); moderate medium blocky structure; contains very few (<2%) hard carbonate nodules; pH 9.8.
B33

150+

Yellowish red (5YR5/6) with (10YR6/4) mottles; medium clay (sandy); pH 9.8.
Management considerations
  • Distinct soil texture contrast between sandy surface (A) horizons and clay subsoil (B21) horizon
  • Soft surface soil condition (ie. not hardsetting) may be susceptible to wind erosion.
  • Thin conspicuously bleached A2 horizon.
  • Coarse columnar structure with hard bleaching capping at top of B horizon, restricting internal drainage
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