Victorian Resources Online - Corangamite

Site SW24

Location: Simpson

Australian Soil Classification: Haplic, Mesotrophic, Brown KANDOSOL

General Landscape Description: Grazing paddock (dairy).
Mapping Unit: Tomahawk Creek Land System (Pitt, 1981).
Site Description: Lower slope in rolling hills landscape.
Geology: Tertiary - Moorabool Viaduct Formation (Lateritised sand and clay).

Image: SW24 Landscape
Site SW24 Landscape

Soil Profile Morphology:

Surface Soil

A11 0-5 cm Dark brown (7.5YR3/4); sandy loam; weak consistence (moist); pH 5.4; abrupt change to:

Image: SW24 Profile
Site SW24 profile

A12 5-15 cm Dark reddish brown (2.5YR3/4); coarse sandy loam; apedal; weak consistence (moist); pH 5.2; clear change to:

A13 15-30 cm Red (2.5YR4/6); coarse sandy loam; apedal; weak consistence (moist); contains a few (5%) quartz fragments (2 - 30 mm in size); pH 5.4; clear change to:

Subsoil

B21 30-60 cm Strong brown (7.5YR5/8); sandy clay loam; weak coarse blocky structure; weak consistence (moist); contains a few (2-5 %) quartz fragments (5-15 cm in size); pH 6.2; gradual change to:

B22 60-90 cm Strong brown (7.5YR5/8); sandy clay loam; weak coarse blocky structure; pH 6.1; sharp change to:

C 90+ cm Laterite.

Key Profile Features:

Key Profile Characteristics:

pH
Salinity Rating
Sodicity
Dispersion

Surface
(A1 horizon)
Strongly Acid
Very Low
Non-Sodic
None

Subsoil
(B21 horizon)
Slightly Acid
Very Low
Non-Sodic
None

Deeper subsoil
(at 60-90 cm)
Slightly Acid
Very Low
Non-Sodic
None

Image: SW24 Graphs

Horizon
Horizon Depth
(cm)
pH
(water)
pH
CaCl₂
EC
1:5
Exchangeable Cations

Ca
Mg
K
Na

meq/100g

A11
0-5
5.4
4.6
0.12
0.05
0.05
0.05
0.05

A12
5-15
5.2
4.4
0.07
1.6
0.2
0.1
0.05

A12
15-30
5.4
4.6
<0.05
0.7
0.05
0.1
0.05

B21
30-60
6.2
5.9
0.06
1.5
0.3
0.4
0.05

B22
60-90
6.1
6
<0.05
0.9
1.2
0.1
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)

A11
0-5
20
14
51
26
4
10

A12
5-15
13
6
51
29
4
12

A12
15-30
10
5
52
29
3
13

B21
30-60
16
10
50
20
2
29

B22
60-90
17
11
54
11
1
31

Profile Described By: Mark Imhof and Austin Brown, August 1998.

Page Top

A11	0-5 cm	Dark brown (7.5YR3/4); sandy loam; weak consistence (moist); pH 5.4; abrupt change to:	Site SW24 profile
A12	5-15 cm	Dark reddish brown (2.5YR3/4); coarse sandy loam; apedal; weak consistence (moist); pH 5.2; clear change to:
A13	15-30 cm	Red (2.5YR4/6); coarse sandy loam; apedal; weak consistence (moist); contains a few (5%) quartz fragments (2 - 30 mm in size); pH 5.4; clear change to:
Subsoil
B21	30-60 cm	Strong brown (7.5YR5/8); sandy clay loam; weak coarse blocky structure; weak consistence (moist); contains a few (2-5 %) quartz fragments (5-15 cm in size); pH 6.2; gradual change to:
B22	60-90 cm	Strong brown (7.5YR5/8); sandy clay loam; weak coarse blocky structure; pH 6.1; sharp change to:
C	90+ cm	Laterite.

	pH	Salinity Rating	Sodicity	Dispersion
Surface (A1 horizon)	Strongly Acid	Very Low	Non-Sodic	None
Subsoil (B21 horizon)	Slightly Acid	Very Low	Non-Sodic	None
Deeper subsoil (at 60-90 cm)	Slightly Acid	Very Low	Non-Sodic	None

Horizon	Horizon Depth (cm)	pH (water)	pH CaCl₂	EC 1:5	Exchangeable Cations
					Ca	Mg	K	Na
					meq/100g
A11	0-5	5.4	4.6	0.12	0.05	0.05	0.05	0.05
A12	5-15	5.2	4.4	0.07	1.6	0.2	0.1	0.05
A12	15-30	5.4	4.6	<0.05	0.7	0.05	0.1	0.05
B21	30-60	6.2	5.9	0.06	1.5	0.3	0.4	0.05
B22	60-90	6.1	6	<0.05	0.9	1.2	0.1	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)


A11	0-5	20	14	51	26	4	10
A12	5-15	13	6	51	29	4	12
A12	15-30	10	5	52	29	3	13
B21	30-60	16	10	50	20	2	29
B22	60-90	17	11	54	11	1	31