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Site SW22

Location: Simpson Australian Soil Classification: Humose-Acidic, Dystrophic, Grey DERMOSOL
General Landscape Description: Grazing paddock (dairy).Mapping Unit: Simpson/Tomahawk Creek Land System (Pitt, 1981).
Site Description: Gently undulating plain.Geology: Tertiary - Moorabool Viaduct Formation.

Image: SW22 Landscape
Site SW22 landscape


Soil Profile Morphology:

Surface Soil

O0-5 cmOrganic mat:

Image: SW22 Profile
Site SW22 profile photo
A15-25 cm Black (10YR2/1); loam; moderate coarse blocky; weak consistence moist; pH 4.5; clear change to:

A225-45 cmVery dark grey (10YR3/1); fine sandy loam; moderate coarse polyhedral structure; weak to firm consistence dry; pH 4.5; gradual change to:

Subsoil

B145-80 cmDark brown (7.5YR3/2); light fine sandy clay loam; weak very coarse prismatic, parting to weak to moderate coarse blocky structure; firm consistence dry; pH 4.8; gradual change to:

B280+ cmBrown (7.5YR5/2) with strong brown (7.5YR5/8) mottles; fine sandy clay loam; weak very coarse prismatic, parting to weak to moderate coarse blocky structure; firm to very firm consistence dry; pH 4.9.

Key Profile Characteristics:

pH
Salinity Rating
Surface
(A1 horizon)
Very Strongly Acid
Very Low
Non-Sodic
None
Subsoil
(B21 horizon)
Very Strongly Acid
Very Low
Non-Sodic
None
Image: SW22 Graphs
Horizon
Horizon Depth
(cm)
pH
(water)
pH
CaCl2
EC
1:5
Exchangeable Cations
Ca
Mg
K
Na
meq/100g
A1
5-25
4.5
3.8
0.14
6.5
0.6
0.1
0.1
A2
25-45
4.5
3.8
0.08
1.1
0.2
0.05
0.05
B1
45-80
4.8
4.3
0.06
0.2
0.05
0.05
0.05
B21
80+
4.9
4.2
<0.05
0.1
0.2
0.05
0.05

Horizon
Horizon Depth
(cm)
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
5-25
30
21
19
42
12
10
A2
25-45
18
9
17
50
19
9
B1
45-80
16
5
19
50
17
10
B21
80+
16
5
19
48
20
15

Profile Described By: Mark Imhof and Austin Brown, August 1988.
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