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NA174

WLRA - soil pit NA174- landscape
Upper slope on northern spur of rise


    Location

Gymbowen, western Victoria

    Landform

Gently Undulating Plain

    Geology

Pliocene Parilla Sand:
marine sand and silt

    Element

Hillcrest

Description
Horizon
Depth (cm)

A1

0–10

Dark yellowish brown (10YR3/4);
sandy loam; weakly structured; weak consistence, dry; pH 6.0; sharp boundary to:

A2

10–30

Yellowish red (5YR4/4); sporadically bleached (5YR7/3d);
sandy loam; weak consistence, dry; pH 6.3; sharp boundary to:

B2

30–80+

Yellowish red (5YR5/8);
medium clay; very strong consistence, slightly moist; pH 7.4.

Management considerations

  • Strong texture contrast between surface (A) and subsoil (B21) horizon.
  • Hard setting nature of surface soil.
  • Structure and texture difference would indicate high susceptibility to compaction.
  • Slightly alkaline profile with high magnesium, sodium and slight salinity at depth.
  • Nutrient levels of subsurface (A2) soil are low compared with soil above and below.
  • Upper slope, good site drainage but poor internal drainage.

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
0–10
6.0
5.0
0.10
3.9
1.1
0.5
0.1
11.2
6.5
A2
10–30
6.3
5.2
0.02
2.5
0.7
0.2
0.0
8.6
4.1
B21
30–80+
7.4
6.2
0.13
4.9
5.5
0.3
2.7
26.2
18.7
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