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EGW84

Location: Gelantipy

Australian Soil Classification: Ferric, Eutrophic, Grey CHROMOSOL (thick surface)

Map Unit: Gelantipy (Component 2)
Previous Site Name: EG84

General Landscape Description: Plateau
Site Description: Upper slope, ENE aspect, 11 % slope
Land Use: Unused
Native Vegetation: Montane grassy woodland
Geology: Tertiary basalt


Soils and landforms of the Buchan and Suggan Buggan region -Gelantipy EG84 landscape


Soil Profile Morphology:


Surface soil
Soils and landforms of the Buchan and Suggan Buggan region -Gelantipy EG84 profile
A10 – 5 cm Dark greyish brown (10YR4/2); silty loam; weak crumb structure; firm consistence dry; few medium ferruginous concretions; gradual change to:
A215 – 50 cmGreyish brown (10YR5/2); silty loam; massive; very firm consistence dry; few medium ferruginous concretions; pH 6.1; clear wavy change to:
A2250 – 60 cmGreyish brown (10YR5/2); silty loam; massive; strong consistence dry; many medium ferruginous concretions; clear wavy change to:
Subsoil
B260 – 100+ cmGrey (10YR5/1) finely mottled with brownish yellow (10YR6/6); heavy clay; strong coarse prismatic structure, very strong consistence dry; very many (>50%) medium to coarse ferruginous concretions and many rounded basalt stones; pH 6.7.

Key Profile Features:


Soil Profile Characteristics:
-

pH
Salinity
Surface soil
(A1 horizon)
Slightly acidic
Very low
Non sodic
None1
Subsoil
(B2 horizon)
Slightly acidic
Very low
Non sodic
None2
1 Moderate after remoulding, 2 Complete after remoulding


Chemical and Physical Analysis:


Horizon
Horizon Depth
(cm)
pH
(water)
pH
(CaCl
2)
EC
dS/m
Organic Carbon
%
Total
Nitrogen
%
Free
Fe
2O3
% w/w
Exchangeable Aluminium
ppm
Exchangeable Acididty
meq/100g
Exchangeable Cations
Coarse Sand
(0.2-2.0 mm)
%
Fine Sand
(0.02-0.2 mm)
%
Silt
(0.002-0.02 mm)
%
Clay
(<0.002 mm)
%
Field Capacity
% w/w
Wilting Point
% w/w
Ca
Mg
K
Na
meq/100g
A2
5-50
6.1
5.3
<0.05
0.76
<0.05
2.2
<1
6.4
2.8
1.3
0.07
0.11
9
41
30
16
27.9
6.4
B2
60-100
6.7
6.2
<0.05
4.1
7.6
8.1
12
0.14
0.74
8
24
22
46
42.4
22.4

Management Considerations

Whole profile
  • The profile is slightly acid throughout
  • Plant roots would find it difficult to penetrate the massive subsurface (A21 and A22) horizons which would be hard setting when dry
  • Plant available water capacity is considered to be low; estimated at 57 mm.

Surface (A) horizons
  • The nutrient holding capacity of the soil is low (based on the sum of the exchangeable basic cations and the depth of roots observed)
  • Potassium levels are very low and a response to potassium would be expected.
Profile Described By: David Rees and Grant Boyle, 2000.
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