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NA171


    Location

Mount Arapiles, western Victoria

    Landform

Playa

    Geology

Quaternary Alluvium:
gravel, sand, silt

    Element

Flat

Description
Horizon
Depth (cm)

A1

0–15

Yellowish brown (10YR3/2);
sand; single grain (structureless); weak dry consistence; pH 7.2; sharp boundary to:

A2

15–50

Light yellowish brown (105YR6/4); bleached (7.5YR7/2d);
fine sand; single grain (structureless); sandy ped-fabric; pH 7.9; sharp boundary to:

B2

50–80+

Strong brown (7.5YR5/6) with common medium (2.5YR4/6) mottles;
sandy clay; very strong consistence, dry ; pH 6.8.

Management Considerations

  • Strong texture contrast profile, sodic subsoil, probably strongly sodic at depth.
  • Occasional subsurface horizon, leached (bleached) with restrictive interface with subsoil.
  • Neutral surface soil and upper subsoil, alkaline subsurface soil.
  • Subsoil is sodic and very highly dispersive. Limited (preferably no) exposure necessary to remain stable.
  • Landscape position as footslope; exposure will accelerate rill/gully erosion in susceptible areas( depressions /drainage lines).

Horizon
Depth (cm)
pH (water)
pH (CaCl2)
EC
dS/m
Exchangeable Cations
cmol-/kg
Field Capacity
(pF2.5)
Wilting Point
(pF4.2)
Ca
Mg
K
Na
A1
0–15
7.2
6.6
0.03
A2
15–50
7.9
6.6.
0.10
B2
50–80+
6.8
5.6
0.08
2.1
3.0
0.3
0.9
31.7
18.6
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