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WWPS1

Location: Longeranong


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

Northcote Factual Key: Ug 5.25
Soil Type: Murtoa Clay
Soil Map Unit: Mc Murtoa Clay

General Landscape Description: Prior stream in a flood plain. Floods infrequently.
Site Description: Cropping paddock with occasional grazing. Poorly drained.
Native Vegetation: Savannah Woodland (yellow gum) with areas of grassland.
Geology: Late Pleistocene to Holocene. Fluvial sediments e.g. from ancestral or current Wimmera River flood plains.

Image: WWPS01 landscape

WWPS1 Landscape


Soil Profile Morphology:

Surface Soil

Ap0-10 cmGreyish brown (10YR5/2); loose surface condition with surface cracks; medium clay; moderate to strong very coarse angular blocky, parting to moderate to strong coarse sub-angular blocky structure; strong consistence dry; pH 6.2; clear change to:
Image: WWPS01 profile
WWPS1 Profile

Subsoil


B2110-25 cmDark greyish brown (10YR4/2); medium heavy clay; strong coarse sub-angular blocky, parting to moderate medium sub-angular blocky structure; strong consistence dry; pH 6.8; changes to:



B2225-60 cmDark greyish brown (2.5Y4/2); medium heavy clay; moderate coarse prismatic, parting to strong coarse to medium angular blocky structure; very firm consistence slightly moist; pH 7.3; gradual change to:

B2360-100 cmDark greyish brown (2.5Y4/2); medium clay; moderate coarse prismatic, parting to strong to moderate coarse angular blocky, parting to strong to moderate medium angular blocky structure; firm consistence slightly moist; slightly calcareous; pH 7.4; gradual change to:

B24100-120 cmOlive brown (2.5Y4/3) with a few (5%) faint brown (7.5YR5/4) mottles; light medium clay; fine lenticular structure; firm consistence moist; slightly calcareous; pH 7.5.

Soil Profile Characteristics:

-

pH
Salinity
Surface
(Ap horizon)
Slightly Acid
Low to Medium
Sodic
Nil1
Subsoil
(B21 horizon)
Slightly Acid
Low
Sodic
Nil2
Deeper Subsoil
(at 60-100 cm)
Slightly Alkaline
High
Strongly Sodic
Nil
1 Moderate dispersion after remoulding. 2 Strong dispersion after remoulding.

Image: WWPS01  graphs
The surface and the upper subsoil are slightly acid. The deeper subsoil is slightly alkaline.The salinity rating in the surface is low to medium. The upper subsoil has a low salinity rating, becoming high with depth.The surface and upper subsoil are sodic, becoming strongly sodic with depth.
    The clay content is high throughout the profile.
Boron content tends to increase with depth.

Chemical and Physical Analysis:


Horizon
Horizon Depth
(cm)
pH
water
pH CaCl2
EC
dS/m
Organic Carbon
%
Total Nitrogen
%
Exchangeable Cations
Boron
mg/kg
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)
Ca
Mg
K
Na
meq/100g
Ap
0-10
6.2
5.6
0.22
1.7
0.15
8.5
5.2
1.4
1.3
1.8
31.9
15.2
5
33
22
36
B21
10-25
6.8
6.0
0.23
9.4
10
0.6
2.8
<0.3
34.8
18.2
1
25
20
52
B22
25-60
7.3
6.6
0.59
7.7
14
0.6
5.3
4.6
41.9
21.4
<1
19
19
60
B23
60-100
7.4
7.1
2.0
6.9
15
0.8
7.9
6.8
43.5
23.3
<1
20
21
57
B24
100-120
7.5
7.1
1.7
6.7
16
0.8
11
1.5

Profile Described By:
Mark Imhof & John Martin (October 2006).
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