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ESAS3

Plot: DPI Rutherglen Centre PaddockLocation: Rutherglen
Australian Soil Classification: Bleached-Sodic, Eutrophic, Red CHROMOSOLSite Description: Hardsetting surface
Geology: Quaternary aeolian and alluvial deposits

ESAS3 landscape
ESAS3 landscape


Soil Profile Morphology:

Surface Soil

A10-5 cmBrown (10YR4/3); fine sandy loam; granular structure associated with rocks; firm consistence (dry); pH 6.2; clear change to:
ESAS3 profile
ESAS3 profile
A250-20 cmLight yellowish brown (10YR6/4 moist) conspicuously bleached (10YR8/1 dry); with light yellowish brown (10YR6/4 dry) mottles; fine sandy loam; massive; very firm consistence (dry); with many 30% ferromanganiferous nodules (2-10 mm); pH 5.1; abrupt and wavy change to:
Note: The bleached A2 horizon can be up to 40 cm deep in places. There is also occasionally a transitional B1 horizon that is heavy fine sandy clay loam in texture – light yellow brown (10YR5/4) with brownish yellow (10YR 6/6) and red (2.5YR 4/6) mottles.
Subsoil
B2120-40 cmYellowish red (5YR4/6) with reddish yellow (7.5YR6/6) mottles in some areas; light medium clay; moderate to strong medium to very fine (2-20 mm) polyhedral structure; strong consistence (dry); pH 5.7; gradual change to:
B2240-55 cmBrownish yellow (10YR6/6) with yellowish red (5YR4/6) mottles common (10-20%); light medium clay; moderate coarse (20-50 mm) subangular blocky, parting to moderate to strong medium to very fine (2-20 mm) polyhedral structure; strong consistence (very slightly moist); pH 6.0; clear change to:
B2355-90 cmReddish brown (2.5YR5/3) with many (30%) brownish yellow slightly diffuse (10YR6/6) mottles; medium heavy clay; weak very coarse (>50 mm) subangular blocky structure; very strong consistence (slightly moist); few (5-10%) soft and semi hard manganese nodules; fine shiny ped faces; pH 7.4; gradual change to:
B2490-130+ cmLight reddish brown (2.5YR6/4); medium heavy clay; moderate very coarse (>100 mm) prismatic, parting to weak to moderate very coarse (>50 mm) subangular blocky structure; very strong consistence (slightly moist); few (5%) soft to semi hard calcareous (?) and very few (2%) ferromanganiferous (2-5 mm) nodules; fine shiny ped faces; pH 7.4.

Key Profile Features:
  • Strong texture contrast between surface (A) horizons and subsoil (B21) horizon.
Soil Profile Characteristics:

Horizon
pH
Salinity Rating
Surface
(A1 horizon)
Slightly Acid
Very Low
Non-Sodic
None
Subsoil
(B21 horizon)
Moderately Acid
Very Low
Non-Sodic
None1
Deeper subsoil
(at 90-130+ cm)
Slightly Alkaline
Very Low
Sodic
Moderate2
1 slight-moderate dispersion after remoulding
2 strong-complete dispersion after remoulding

ESAS3 graphs
Horizon
Horizon Depth
(cm)
pH
(water)
pH
(CaCl2)
EC 1:5
Exchangeable Cations
Ca
Mg
K
Na
meq/100g
A1
0-5
6.2
5.9
0.12
5
1
0.76
0.21
A2
5-20
5.1
4.4
0
2.1
0.42
0.23
0.11
B21
20-40
5.7
4.7
0
7.3
4.9
0.40
0.42
B22
40-55
6
4.8
0.06
6.9
7.1
0.47
0.89
B23
55-90
7.4
6.4
0.02
6.7
9.3
0.56
1.8
B24
90-130+
7.4
6.3
0.02
7.3
10
0.21
2.3

Horizon
Horizon Depth
(cm)
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
0-5
4.5
28.7
6.0
12
50
23
11
A2
5-20
5.2
24.3
4.3
8
53
23
11
B21
20-40
9.8
37.4
19.4
5
21
9
63
B22
40-55
12
38.3
22.1
4
14
6
74
B23
55-90
35.1
18.8
6
24
10
56
B24
90-130+

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