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GP88

Location: Moondarra South

Australian Soil Classification: Bleached-mottled, Magnesic, Grey KUROSOL

Map Unit: Boolarra
Soil Type (equivalent to): Boolarra Loam (Poutsma and Turvey, 1979)


General Landscape Description: Crest of rolling low hills.
Site Description: Roadside reserve.
Geology: Moondarra Surface
Native Vegetation: Silvertop Ash (E. Sieberi)

Image: GP88 landscape
GP88 Landscape.


Soil Profile Morphology:

Surface Soil

A10-15 cmDark grey (10YR4/1); silty clay loam; very firm consistence dry; pH 5.1; clear change to:


Image: GP88 profile
GP88 Profile
A215-40 cmVery pale brown (10YR7/3) with few (5-10%) yellow (10YR7/6) mottles; silty clay loam; pH 5.3; clear change to:

Subsoil

B2140-80 cmLight grey (10YR7/1) with few (10%) brownish yellow (10YR6/6) mottles; light medium clay (silty); strong coarse blocky parting to moderate coarse polyhedral structure; pH 5.3.


Soil Profile Characteristics:

pH
Salinity Rating
Surface
(A1 horizon)
Strongly Acid
Very Low
Non-Sodic
None
Subsoil
(B21 horizon)
Strongly Acid
Very Low
Non-Sodic
None

Image: GP88 graphs

This profile is strongly acid throughout. The salinity rating is very low though the whole profile.The aluminium levels are high throughout the profile.
    The clay content is low in the surface, and sharply increases at the A/B interface.

Horizon
Horizon Depth
(cm)
pH
(water)
pH
CaCl2
EC
(dS/m)
Exchangeable Cations
Ca
Mg
K
Na
meq/100g
A1
0-15
5.1
4.1
0.06
1.1
1.0
<0.1
0.1
A2
15-40
5.3
4.3
<0.05
0.3
0.9
<0.1
<0.1
B21
40-80
5.3
4.2
<0.05
0.2
2.0
<0.1
<0.1

Horizon
Horizon Depth
(cm)
Acidity
meq/100g
Oxidisable Organic Carbon
%
Exchangeable Aluminium
mg/kg
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)
A1
0-15
12
1.4
270
28.0
5.5
3.6
33.5
44.5
13.0
A2
15-40
6.7
250
23.7
7.4
2.2
27.5
48.0
22.0
B21
40-80
8.2
310
32.8
18.9
0.4
11.3
37.0
52.0


Profile Described By: Mark Imhof and Ian Sargeant (January 1999).
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