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Site IS12

Location: Longerenong.


Australian Soil Classification: Endocalcareous-Endohypersodic, Epipedal, Grey VERTOSOL

General Landscape Description: Anastomotic plain.
Geology: Quaternary Shepparton Formation: fluvial silt, sand and minor gravel.


Soil Profile Morphology:

Surface Soil

A10-5 cmDark grey (10YR4/1); light clay; subplastic; cracking and self-mulching surface condition; moderate coarse subangular blocky structure; very strong consistence dry; slightly sticky consistence wet; pH 7.2; sharp and wavy boundary to:
Image: IS12- Profile
IS12 Profile.
Subsoil

B215-25 cmGrey (5Y5/1); light clay; subplastic; moderate coarse prismatic structure; strong consistence dry; moderately sticky consistence wet; pH 8.9.

B2225-60 cmGrey (5Y5/1); heavy clay; subplastic; moderate coarse prismatic structure; strong consistence dry; moderately sticky consistence wet; very few (<2%) hard and soft carbonate segregations; pH 9.2; sharp and wavy boundary to:
B2360-110 cmGrey (5Y5/1); heavy clay; plastic; coarse lenticular structure (slickensides); strong consistence dry; moderately sticky consistence wet; very few (<2%) hard carbonate segregations; pH 9.3; gradual boundary to:
B31110-150 cmGreyish brown (10Y5/2); heavy clay; plastic; coarse lenticular structure (slickensides); strong consistence dry; slightly sticky consistence wet; very few (<2%) hard carbonate segregations; pH 9.3; gradual boundary to:
B32150-180Brown (10Y5/3); heavy clay; plastic; coarse lenticular structure (slickensides); strong consistence dry; slightly sticky consistence wet; pH 9.1; gradual boundary to:
B33180-215Greyish brown (10Y5/2); heavy clay; plastic; coarse lenticular structure (slickensides); strong consistence dry; slightly sticky consistence wet; pH 8.9.


Soil Profile Characteristics:



Horizon
Sample Depth cm
pH
EC
dS/m
Sodium Chloride
%
Exchangeable Calcium
cmol-/kg
Exchangeable
Magnesium
cmol-/kg
Exchangeable Potassium
cmol-/kg
Exchangeable Sodium
cmol-/kg
Exchangeable Aluminium
mg/kg
Exchangeable Acidity
cmol-/kg
Field
Capacity
-30okPa
Permanent
Wilting
Point
-1500okPa
Coarse
Sand
%
Fine
Sand
%
Silt
%
Clay
%
H2O
CaCl2
A1
0–5
7.2
NA
0.11
0.02
9.9
8.7
2.5
0.7
NA
6.7
34.2
18.4
7
23
8
59
B21
5–25
8.9
NA
0.14
0.02
16.6
14.2
2
3.1
NA
3
42.3
25.7
3
7
6
83
B22
25–60
9.2
NA
0.24
0.02
13.4
17.3
2.1
5.6
NA
NA
NA
21.9
3
9
6
81
B23
60–110
9.3
NA
0.41
0.05
9.7
17
1.9
8.7
NA
NA
NA
26.7
4
11
8
76
B31
110–150
9.3
NA
0.64
0.11
6.6
14.5
1.7
10.4
NA
NA
NA
24.2
5
14
9
69
B32
150–180
9.1
NA
0.62
0.12
NA
NA
NA
NA
NA
NA
NA
25.2
4
15
10
70
B33
180–215
8.9
NA
0.67
0.11
NA
NA
NA
NA
NA
NA
NA
24.8
4
15
10
69
Note: NA=not assessed.

Management Considerations:
  • Cracking clay profile, very high clay percentage, decreasing below upper subsoil
  • Neutral thin surface soil and alkaline below
  • Friable self mulching surface, feels lighter than lab data suggests (subplastic), as does upper subsoil
  • Calcium percentage decreasing with depth
  • Yellow hue profile(5Y) and lighter coloured deep subsoil, poorer internal drainage
  • Subsoil is strongly sodic and salinity increases at depth, particularly below 50cm
  • Cracking may allow air and seasonal moisture to penetrate
  • Very strong consistence when dry, implications for compaction and implement use
  • Landform element, plain: poor site drainage
Profile Described By: John Martin, Nabil Badawy, Ron Cawood, Geoff Pope, John Galea, John Turner (1970).
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