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CFTT3

SITE: CFTT 3Site: Mt Worth East
Location: APP species/seedlot trial VRV 145Aust. Soil Class.: Acidic, Mesotrophic, Brown DERMOSOL
Great Soil Group: brown podsolic Tech. Class: 051-5-50/4-1-1-32
Site Description: Waning lower 5% slope to south-westGeology: Cretaceous sediments
APP Mapping Unit: Balook


Soil Profile Morphology:

Surface Soil

A10 – 20 cmDark greyish brown (10YR4/2); clay loam; moderate medium polyhedral structure; very weak consistence moist; pH 4.8; gradual and smooth transition to:

Subsoil
B2120 - 40 cmBrown (10YR5/3); clay loam; moderate coarse polyhedral structure; weak consistence moist; pH 4.9; diffuse and smooth transition to:

B2240 – 80 cmGreyish brown (10YR5/2), with few, fine, faint yellowish brown (10YR5/6) mottles; light clay; weak coarse polyhedral structure; weak consistence moist; pH 4.8; diffuse and smooth transition to:

B2380 – 120 cmGrey (10YR5/1), with common, medium, distinct yellowish brown (10YR5/4) mottles, medium clay; weak coarse polyhedral structure; firm consistence moist; pH 4.7; gradual transition to:

B24 120 – 160 cmGrey (10YR5/1), with many, medium, distinct yellowish brown (10YR5/4 and 10YR5/6) mottles; medium clay; weak very coarse to coarse polyhedral structure; firm consistence moist; pH 4.7.

Key Profile Features:

  • Lack of strong texture contrast between surface (A) horizon and subsoil (B) horizons.
Soil 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
Deeper subsoil
(at 1.2 m)
Very strongly acid
Very low
Non-sodic
none

CFTT3 pH
The soil profile is very strongly acid throughout
CFTT3 salinity
The salinity rating is very low throughout the profile.
CFTT3 exchangeable aluminium
The level of exchangeable aluminium is high
throughout most of the strongly acid soil profile
(apart from the upper subsoil).
CFTT3 exchangeable aluminium
The clay percentage increases gradually with depth down the soil profile.

Horizon
Horizon Depth
pH (water)
pH CaCl2
EC
1:5
NaCl
Exchangeable Cations
Ca
Mg
K
Na
Meq/100g
A1
0-20
4.8
4.2
0.09
2.4
1.7
0.55
0.19
B21
20-45
4.9
4.2
0.07
1.6
1.4
0.38
0.17
B22
45-80
4.8
4.1
0.09
1.7
2.2
0.5
0.19
B23
80-120
4.7
4
0.09
2
4.8
0.54
0.27
B24
120-160
4.7
3.9
0.09
2.1
5.1
0.61
0.28

Horizon
Horizon Depth
Ex Al
mg/kg
Ex Ac
meq/100g
Field
pF 2.5
Wilting Point
pF4.2
g/100g
Coarse Sand
(0.2-2.0mm)
%
Fine Sand
(0.02-0.2mm)
%
Silt
(0.002-0.02mm)
%
Clay
(<0.002mm)
%
A1
0-20
280
16
40
18.1
1.5
23.9
35.5
34.5
B21
20-45
18
16
36.8
14.9
1
25.4
38.5
32.5
B22
45-80
260
16
37.2
18.2
0.6
21.7
33
43.5
B23
80-120
160
24
44.3
24.2
0.1
12.5
21.5
61.5
B24
120-160
150
26
49.4
7.4
0.2
9.4
21
66


Management Considerations:
  • Levels of exchangeable Potassium (K) relative to the other basic cations (ie. Na, Ca, Mg) are quite high (although not as high as for site CFTT1).
  • The high levels of exchangeable aluminium in much of the very strongly acid soil profile may restrict the growth of aluminium sensitive species.
  • The very strongly acid soil profile indicates that some trace elements (eg. copper, molybdenum) may be poorly available to plants.
  • The clayey surface soil is liable to compaction from heavy trafficking or overstocking when in a moist to wet condition.
  • The upper metre of the soil profile has a weak consistence when moist – indicating that root movement should not be significantly restricted.
Profile described by: Ian Sargeant, Mark Imhof and Justin Wong (1/6/99)

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