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SW63

SW63 landscape
View of the plain south of Simpson taken from this soil site (SW63)
    Site Code
SW63
SW63 profile
Humose, Sesquic, Aquic PODOSOL (thick sandy surface/clay loamy subsoil)
    Location
South of Simpson: Lavers Hill Road and Princetown Road
    Landform
Gently undulating plain
    Geology
Neogene Hanson Plain Sand Formation
    Element
Plain
    Slope
<1%
    Aspect
0
Horizon
Depth (cm)
Description
Ah
0-50 Black (10YR2/1 moist); loamy sand, apedal; weak consistence; many whitish sand grains; horizon becomes paler; dark grey (10YR4/1) at about 15 cm but difference is not marked enough to be described as A2; pH 5.1; abrupt and wavy boundary to:

B21sm
50-52 Dark brown (10YR3/3) to dark yellowish brown (10YR3/4) light fine sandy clay loam; weakly cemented thin pan; firm consistence; clear boundary to:

B22s(g)
52-80/90+Mottled light olive brown (2.5Y5/3 moist) pale yellow (2.5Y7/3 dry) and olive yellow (2.5Y6/6); fine sandy clay loam; apedal massive; firm consistence; pH 4.6; diffuse boundary to:

B23g
80/90+ Mottled light yellowish brown (2.5Y6/3) light grey (2.5Y7/2 dry) and yellowish brown (10YR5/8); loam; apedal massive; pH 4.6.

Management considerations
Very sandy surface soil is quite high in organic matter (6.8% organic carbon) which assists in maintaining soil stability and nutrient retention. The very low clay content and acidity is typical of these Podosols in the Hanson Plain Sand. The B21 thin iron pan is a barrier to root growth and to water movement. The mottled colours in the deeper B horizons (B22 and B23) indicate a soil that is subject to waterlogging. Compare this soil with SW61 for a variant of the Podosol and with SW60 and SW62 for other soils found in this land element.

Analytical data
Site SW63
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
%
%
%
%
%
%
A
0–50
5.1
3.9
0.12
N/R
2.8
0.52
0.55
0.31
59
19
22.5
11.4
26.1
43
15
3
B22s(g)
50–85
4.6
4.4
0.1
N/R
0.09
0.1
<0.05
0.23
160
11
17.8
8.3
16.9
47.4
15.5
16.5
B23g
85+
4.6
4.2
0.07
N/R
<0.05
0.17
<0.05
0.16
170
4.9
14.3
5.4
17.5
48.4
18.5
15.5
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