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VIT3

Australian Soil Classification: Bleached-Acidic, Mesotrophic, Red DERMOSOL

VIT3 landscape
VIT3 landscape

Soil Profile Morphology:

Surface Soil

A1
0-15 cm
Very dark greyish brown (10YR3/2); light very fine sandy clay loam; weak medium, parting to moderate fine to very fine subangular blocky structure; firm consistence (dry); medium to coarse (2-20 mm) angular quartz fragments common (15%); pH 6.4; clear change to:
VIT3 profile
VIT3 profile
A21
15-20 cm
Very dark greyish brown (10YR3/2); sporadically bleached; light very fine sandy clay loam; firm consistence (dry); medium (2-10 mm) quartz fragments common (15%); pH 5.5; clear change to:
A22
20-35 cm
Brown (7.5YR5/3) with many (20%) reddish yellow (7.5YR6/6) mottles; conspicuously bleached; very fine sandy clay loam; firm consistence (dry); few (5-10%) fine to coarse (2-20 mm) quartz fragments; pH 5.1; gradual change to:
A3
35-45 cm
Brown (7.5YR5/4); very fine sandy clay loam; moderate medium subangular blocky structure; weak to firm consistence (moist); few (5-10%) fine to coarse (2-15 mm) quartz fragments; pH 5.2; gradual change to:
Subsoil
B2145-60 cmYellowish red (5YR5/6) with many (40%) pale brown (10YR6/3) mottles; light clay; moderate – strong, medium to fine subangular blocky structure; few macropores; weak to firm consistence (moist); few (5%) quartz nodules; pH 5.1; gradual change to:
B2260-85 cmDark red (2.5YR4/6) with few (10%) yellowish brown (10YR6/6) mottles; medium clay; moderate - strong, medium to fine subangular blocky structure; many (50%) shale fragments (10-30 mm) weak consistence (moist); pH 4.9; gradual change to:
B2385-120 cmDark red (2.5YR4/6) with brownish yellow (10YR6/8) mottles; medium clay; pH 4.8:
B24120+ cmDark red (2.5YR4/6) with few (10%) light yellowish brown (10YR6/4) and grey (10YR6/1) mottles in patches; sandy clay loam.

Key Profile Features:
Soil Profile Characteristics:
Horizon
pH
Salinity Rating
Surface
(A1 horizon)
Slightly Acid
Very Low
Non-Sodic
None
Subsoil
(B21 horizon)
Very Strongly Acid
Very Low
Non-Sodic
None
Deeper subsoil
(at 85-120 cm)
Very Strongly Acid
Very Low
Non-Sodic
None

VIT3 graphs

Horizon
Horizon Depth
(cm)
pH
(water)
pH
(CaCl2)
EC 1:5
Exchangeable Cations
Ca
Mg
K
Na
meq/100g
A1
0-15
6.4
5.8
0.07
7.9
1.6
0.52
0.13
A21
15-20
5.5
4.7
<0.05
2.8
0.73
0.23
0.09
A22
20-35
5.1
4.3
<0.05
1.1
0.44
0.31
0.09
A3
35-45
5.2
4.4
<0.05
0.95
0.55
0.38
0.08
B21
45-60
5.1
4.2
<0.05
1.3
1.2
0.60
0.13
B22
60-85
4.9
4.1
0.05
0.61
1.8
0.49
0.09
B23
85-120
4.8
4.1
<0.05
0.16
0.68
0.24
0.08

Horizon
Horizon Depth
(cm)
Exchangeable Aluminium
mg/kg
Exchangeable Acidity
meq/100g
Field Capacity
pF 2.5
Wilting Point
pF 4.2
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
0-15
<10
6.6
35.9
8.7
14
28
38
14
A21
15-20
43
8.2
28.7
6.6
18
29
37
13
A22
20-35
200
6.7
26.0
7.9
13
20
45
21
A3
35-45
240
6.5
25.2
9.4
13
22
40
24
B21
45-60
400
8.3
27.1
12.7
12
18
32
35
B22
60-85
860
15
32.6
19.4
12
13
21
54
B23
85-120
570
7.8

Notes: Profile described by Mark Imhof and Kevin Powell (December 2004).
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