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WLRA129

WLRA - soil pit WLRA129- landscape
Long undulating cropped plain
    Site Code
WLRA129
WLRA - soil pit WLRA129- profile
Bleached-Sodic, Eutrophic, Red Dermosols

    Location

Jeparit Road, Peppers Plains, western Victoria

    Landform

Undulating plain

    Geology

Quaternary Woorinen Formation: aeolian dune sand, calcareous clay

    Element

Rise crest

    Slope

2–3% North-west


Horizon
Depth (cm)
Description

A11

0–5

Dark reddish brown (5YR3/2); sandy loam; medium to very fine moderate polyhedral structure; rough ped fabric; very weak consistence, dry; pH 7.5; smooth and sharp change to:

A12

5–10

Dark reddish brown (5YR3/2); sandy clay loam; massive (structureless); earthy ped fabric; very firm consistence, dry; moderately cemented cultivation pan; pH 7.0; abrupt and wavy change to:

B21

10–25

Reddish brown (5YR4/4); light clay; medium to coarse strong prismatic structure; rough ped fabric; very strong consistence dry; moderately calcareous; contains very few fine manganiferous nodules; common distinct cutans evident; pH 8.8; gradual and wavy change to:

B22k

25–75

Light brown (7.5YR6/4) with a few medium faint red mottles; light clay, sandy; coarse weak polyhedral structure; rough ped fabric; firm consistence dry; very many extremely coarse calcareous soft segregations and very few medium argillaceous tubules present; very highly calcareous: pH 9.3; smooth and gradual change to:

B3k

75–115

Yellowish red (5YR5/6); light clay; massive (structureless); earthy fabric; firm consistence, moderately moist; many very coarse calcareous soft segregations and very few medium argillaceous tubules; very highly calcareous; pH 9.9; clear and wavy change to:

2B2k

115–145

Light brown (7.5YR6/4) with common medium faint red mottles; sandy clay loam; coarse weak polyhedral structure; rough ped fabric; firm consistence, moderately dry; contains common coarse calcareous soft segregations, a few fine manganiferous flecks and very few medium argillaceous tubules; very highly calcareous; pH 10.1; diffuse and smooth change to:

2C

145–160+

Light brown (7.5YR6/4); clay loam, coarse sandy; massive (structureless); earthy ped-fabric; moderate consistence when moderately moist; very highly calcareous; many very coarse faint red and very pale brown mottles; few fine manganiferous flecks and few medium calcareous soft segregations; pH 10.0.

Management Considerations

  • Moderate to high susceptibility to wind erosion.
  • Alkaline subsoils with calcareous soft segregations, manganese flecks and argillaceous (clayey) tubules.
  • Minor subsoil constraint >75 cm as mottling indicates slightly imperfect drainage.
  • Possible plough pan (5­10 cm).
  • Moderately structured surface with very weak resistance to breaking down makes it vulnerable to wind erosion without stubble and trash retention.
  • Poorer structure and increased dispersibility of subsoil.

Horizon
Depth (cm)
pH (water)
pH (CaCl2)
EC
dS/m
Exchangeable Cations
cmol-/kg
Ca
Mg
K
Na
A11
0–-5
7.5
7.1
0.14
8
3.1
1.7
0.14
A12
5–10
7.4
6.9
0.09
9.1
3.7
1.3
0.18
B21
10–25
8.8
8.2
0.15
26
7
1.3
0.29
B22K
25–75
9.3
8.6
0.17
22
9.2
1.3
0.98
B3K
75–115
9.9
9.6
0.45
2.7
11
2
5.4
2B2
115–145
10.1
9.0
0.55
2
8.3
1.5
6.3
2C
145–160+
10.0
9.3
0.54
1.7
6.6
1.4
6.3
CC BY 4.0 AU

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