Your gateway to a wide range of natural resources information and associated maps

Victorian Resources Online

SW71

Location: Tulloh

Australian Soil Classification: Bleached-Vertic (& Mottled), Magnesic, Brown CHROMOSOL

General Landscape Description: Undulating low hills.
Site Description: Waxing upper slope.
Geology: Otway Group (volcanogenic sandstone).

Image: SW71 Landscape
SW71 Landscape


Soil Profile Morphology:


Surface Soil


A10-20 cmDark gray (10YR4/1 moist), grayish brown (10YR5/2 dry), fine sandy loam; moderately pedal; weak to firm consistence; pH 5.5:
South West Gasp Pipeline SW71 Profile
SW71 Profile. Note: Surface (A1) horizon has been stripped from the soil profile
A2e20-50/60 cmLight brownish gray (2.5Y6/2 moist), conspicuously bleached (2.5Y8/1 dry); fine sandy loam; hard setting; common (<20%), fine ferromanganiferous gravel (mostly not magnetic) sporadic and not in thick layer; very firm consistence; clear to gradual change (incipient B1) to; pH 5.8:
Subsoil

B21ss50/60-100/120 cmDark yellowish brown (10YR3/4 moist and dry); many (~25%), faint, fine to coarse (5-20 mm) yellow brown/ dark red mottles; heavy clay; coarse (50-120 mm) prismatic, parting to thick lenticular or angular blocky structure; slickensides; diffuse yellower change to; pH 6.0:
C/B100/120+ cmBrownish yellow (10YR6/8 moist) to yellow (10YR8/8 dry); fine sandy with white (10YR8/1 moist) and very dark gray (5YR3/1 moist) ped faces; below 150 cm, extremely hard to break with geopick; cemented ferruginised sandstone.

Key Profile Features:
  • Conspicuously bleached subsurface (A2) horizon.
  • Strong texture contrast between surface (A) horizons and subsoil (B21) horizon.

Soil Profile Characteristics:

pH
Salinity Rating
Surface
(A1 horizon)
Strongly Acid
Low
Non-Sodic
None
Subsoil
(B21 horizon)
Moderately Acid
Very Low
Non-Sodic
None


Image: SW71 Graphs

The surface soil is strongly acid. The deeper subsoil is moderately acid.Salinity rating is low in the surface becoming very low in the subsoil.
    The soil is non sodic throughout.
The clay content increases markedly at the A/B boundary.

Horizon
Sample Depth
(cm)
pH
(water)
pH
(CaCl2)
EC
1:5
Nitrogen
%
Organic Carbon
%
Exchangeable Cations
Ca
Mg
K
Na
meq/100g
A1
0-10
5.5
4.7
0.12
0.31
4.6
3.2
2.1
0.23
0.35
A2
30-50
5.8
4.7
<0.05
0.67
0.96
<0.05
0.17
B21
65-85
6
4.9
0.1
1.2
12
0.15
1.4

Horizon
Sample Depth
(cm)
Exchangeable Aluminium
mg/kg
Exchangeable Acidity
meq/100g
Field Capacity
pF2.5
Wilting Point
pF4.2
Coarse Sand
(0.2- 2.0 mm)
Fine Sand
(0.02- 0.2 mm)
Silt
(0.002- 0.02 mm)
Clay
(<0.002 mm)
A1
0-10
23
14
33.5
11.4
10
38
27
18
A2
30-50
23
6.2
19.1
6.8
8
45
24
24
B21
65-85
19
13
43
27
1
11
7
80


Management Considerations:

Notes

  • Soils showing increasing vertic properties downslope.

Profile Described By: Richard McEwan (April 1999).
Page top