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IS9

Location: Murtoa


Australian Soil Classification: Endocalcareous-Endohypersodic, Self-Mulching, Grey VERTOSOL

Northcote Factual Key: Ug5.25
Great Soil Group: grey clay
Soil Type: Kalkee Clay.


General Landscape Description: Hillslope of a gently undulating plain.
Geology: Pliocene Parilla Sand: marine sand and silt.

Soil Profile Morphology:

Surface Soil
A10-10 cmDark greyish brown (10YR4/2); light clay; subplastic; cracking and self-mulching surface condition; weak coarse granular structure; very weak consistence dry; slightly sticky consistence wet; pH 8.5; sharp boundary to:
Subsoil

B2110-45 cmDark grey (10YR4/1); medium clay; subplastic; weak coarse subangular blocky structure; strong consistence dry; slightly sticky consistence wet; pH 9.1:

B2245-95 cmDark grey (10YR4/1); medium clay; subplastic; weak coarse subangular blocky structure; strong consistence dry; slightly sticky consistence wet; very few (<2%) hard carbonate segregations; pH 9.3:

B2395-110 cmGrey (10YR5/1); medium clay; subplastic; weak coarse subangular blocky structure; strong consistence dry; slightly sticky consistence wet; very few (<2%) hard carbonate segregations; pH 9.2:

B24110-145 cmGrey (10YR5/1) with reddish yellow (7.5YR6/6) mottles; medium clay; subplastic; weak coarse subangular blocky structure; strong consistence dry; slightly sticky consistence wet; very few (<2%) hard carbonate segregations; pH 9.2; gradual boundary to:

B31145-190Reddish yellow (7.5YR6/6) with greyish brown (10YR5/2) mottles; heavy clay; plastic; moderate coarse subangular blocky structure; strong consistence dry; moderately sticky consistence wet; very few (<2%) hard carbonate segregations; pH 9.0; gradual boundary to:

B32190-220Reddish yellow (7.5YR6/6) with red (2.5YR4/8) mottles; heavy clay sandy; plastic; moderate coarse blocky structure; strong consistence dry; moderately sticky consistence wet; very few (<2%) hard carbonate segregations and few (2-10%) weathered sandstone; pH 8.9.


Chemical and Physical Analysis:


Horizon
Sample Depth cm
pH
H2O
EC
dS/m
Sodium Chloride
%
Exchangeable Calcium
cmol-/kg
Exchangeable
Magnesium
cmol-/kg
Exchangeable Potassium
cmol-/kg
Exchangeable Sodium
cmol-/kg
Organic Carbon
%
Exchangeable Acidity
cmol-/kg
Total Nitrogen
%
Permanent
Wilting
Point
-1500okPa
Coarse
Sand
%
Fine
Sand
%
Silt
%
Clay
%
A1
0–10
8.5
0.18
0.01
31.2
3.9
1.7
1.2
0.9
2.5
0.11
22.6
12
17
9
58
B21
10–45
9.1
0.22
0.02
26
8
1.4
2.9
0.48
0.05
34.1
16
16
8
59
B22
45–95
9.3
0.43
0.05
20
11.3
1.3
8.4
0.39
0.05
28.2
15
14
9
58
B23
95–110
9.2
0.7
0.09
17.4
12.6
1.6
12.9
0.29
0.04
30.4
9
15
9
59
B24
110–145
9.2
0.9
0.1
16.5
12.2
1.5
13.1
0.22
0.03
28.7
7
12
9
62
B31
145–190
9.0
1.16
0.15
28.2
9
12
8
62
B32
190–220
8.9
1.01
0.12
20.6
28
12
8
50


Management Considerations: Profile Described By: John Martin, Nabil Badawy, Ron Cawood, Geoff Pope, John Galea, John Turner (1970).
CC BY 4.0 AU

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