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ESAS8a

Location: Dunkeld

Soil Profile Morphology:
ESAS8a -b landscape
ESAS8a-b Landscape
Surface Soil

A10-12 cmVery dark greyish brown (10YR3/2); fine sandy clay loam; very few (~2%) ferruginous nodules (2-4 mm); no dispersion after remoulding; pH 6.4; clear change to:
ESAS8a profileESAS8a profile
A212-35 cmGreyish brown (10YR5/2) and light grey (10YR7/1 dry); conspicuously bleached; silty clay loam; pH 6.8; structureless:
Subsoil
B2135-60 cmGreyish brown (10YR5/2) with very dark grey (10YR3/1) organic staining; medium heavy clay; weak coarse to very coarse prismatic structure; very firm to strong consistence (dry); dispersive after remoulding; dark and bleached mixed material; pH 7.8:
B2260-80 cmLight brownish grey (10YR6/2) with very dark grey (10YR3/1) mottles and yellowish brown (10YR5/6) organic staining; heavy clay; strong medium to coarse lenticular structure; pH 8.2.

Key Profile Features:
  • Below 1m weathering basalt boulders.
Soil Profile Characteristics:

pH
Salinity Rating
Surface
(A1 horizon)
Slightly Acid
Subsoil
(B21 horizon (30-45 cm)
Slightly Alkaline
Deeper subsoil
(at 80-120 cm)
Moderately Alkaline

ESAS8a graphs

Horizon
Horizon
Depth
(cm)
pH
(water)
pH
(CaCl2)
EC 1:5
Organic Carbon
g/100g
NaCl
%
Exchangeable Cations
Ca
Mg
K
meq/100g
A1
0-12
6.4
6.3
0.59
4.5
0.02
12
3.6
1.4
A2
12-35
6.8
6.2
0.08
0.94
2.8
2.0
0.59
B21
35-60
7.8
7.1
0.11
2.2
3.2
0.98
B22
60-80
8.2
7.4
0.23
4.9
9.0
1.7
B23
80-120
8.3
7.5
0.28
0.02

Horizon
Horizon Depth
(cm)
Exchangeable
Aluminium
mg/kg
Exchangeable Acidity
meq/100g
Field
Capacity
pF2.5
Wilting
Point
pF4.2
Gravel
%
Coarse Sand
(0.2-2.0mm)
Fine Sand
(0.02-0.2mm)
Silt
(0.002-0.02mm)
Clay
(<0.002mm)
A1
0-12
<10
6.4
30.3
14.3
17
37
15
19
A2
12-35
2.1
17.3
5
14
53
12
20
B21
35-60
16.3
7.6
26
41
12
19
B22
60-80
32.5
19.2
19
21
13
42
B23
80-120
32.9
17.6
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