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SW57

SW57 landscape
View of excavation at soil sites SW55, SW56 (distant) and SW57, SW58 (foreground)
    Site Code
SW57

SW57 profile
Humose, Dermosolic, Redoxic HYDROSOL
(surface has been stripped from this profile)
    Location
Cooriemungle road / Gallum road, tributary of Ross Creek, Heytesbury district
    Landform
Valley floor
    Geology
Neogene Hanson Plain Sand and Gellibrand Marl: Alluvium
    Element
Plain on valley floor
    Slope
0%
    Aspect
NE
Horizon
Depth (cm)
Description
A1
0-20 Very dark brown (10YR2/2); clay loam; weak polyhedral (10-20 mm) structure; weak consistence; clear and smooth boundary to:

B21g
20-90/95 Light brownish grey (10YR6/2 moist and 10YR7/2 dry) with common (10-15%) faint, fine, brownish yellow (10YR6/8 moist) mottles; fine sandy clay loam; weak prismatic structure in upper horizons, becoming increasing pedal at depth (weak medium prismatic, parting to medium blocky structure); firm consistence; pH 5.7; clear boundary to:

B22g
90/95+Grey (10YR5/1 moist) with many (20-30%) brownish yellow (10YR6/8) mottles; heavy clay; very coarse prismatic (larger at depth), parting to very coarse to coarse blocky structure; very firm consistence.

Management considerations
Dairying is the principle land use in this district. The low lying nature of the land, high rainfall and clay subsoil render this very prone to waterlogging and pugging by dairy cattle. This and similar soils respond well to close spaced drains to alleviate waterlogging and form reasonably stable mole channels.

See also profile SW58 for variation in the soil profile at this site.

Analytical data
Site SW57
Sample
depth
pH
EC
NaCl
Ex Ca
Ex Mg
Ex K
Ex Na
Ex Al
Ex acidity
FC
(-10kPa)
PWP
(-150kPa)
KS
FS
Z
C
Horizon
cm
H2O
CaCl2
dS/m
%
cmolc/kg
cmolc/kg
cmolc/kg
cmolc/kg
mg/kg
cmolc/kg
%
%
%
%
%
%
A1
0-20
5.9
5.4
0.22
N/R
12.0
2.8
0.4
0.46
<10.0
13.0
35.8
15.4
4.5
45.5
21.0
19.0
B21g
40-60
5.7
4.9
0.06
N/R
2.0
3.0
0.08
0.26
58.0
5.1
N/R
N/R
3.0
52.4
25.5
20.5
B22g
95+
5.8
4.8
0.1
N/R
3.4
3.8
0.23
0.54
22.0
5.4
25.1
13.4
13.3
39.0
23.0
25.5
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