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WLRA130

WLRA - soil pit WLRA130- landscape

    Site Code
WLRA130
WLRA - soil pit WLRA130- profile
Epihypersodic, Regolithic, Hypercalcic Calcarosol

    Location

Jeparit Road, Peppers Plains, western Victoria

    Landform

Undulating plain

    Geology

Quaternary Woorinen Formation:
aeolian dune sand, calcareous clay

    Element

Lower slope

    Slope

0–1%

    Aspect

North-west
Horizon
Depth (cm)
Description

A1

0–5

Dark brown (10YR4/3); sandy clay loam; massive (structureless); earthy fabric; weak consistence when dry; highly calcareous; few medium and fine calcareous nodules; pH 9.0; smooth and sharp boundary to:

B21

5–25

Dark greyish brown (10YR4/2); light clay, fine sandy; very coarse weak columnar structure; rough ped-fabric; very firm consistence when dry; highly calcareous; very few fine calcareous nodules and fragments, very few fine gypseous nodules and very few fine argillaceous tubules; moderately cemented cultivation pan, pH 9.0; gradational and smooth boundary to:

B22

25–50

Yellowish brown (10YR5/4); light clay, fine sandy; massive (structureless); earthy fabric; weak consistence when moderately moist; highly calcareous; many medium faint greyish brown mottles: very few fine calcareous nodules and fragments and very few fine argillaceous tubules; pH 9.0; diffuse and smooth boundary to:

B23k

50–100

Reddish yellow (7.5YR7/6); light clay; massive (structureless); earthy fabric; weak consistence when moderately moist; very highly calcareous; very many extremely coarse calcareous soft segregations and very few medium argillaceous tubules; pH 9.5; gradual and wavy boundary to:

2B21

100–145

Yellowish red (5YR5/6); heavy clay; weak medium to coarse polyhedral structure; rough ped-fabric; weak consistence when moderately moist; highly calcareous; many very coarse distinct greyish brown mottles; few fine manganese flecks and few extremely coarse calcareous nodules; pH 9.5; gradual and smooth boundary to:

2B22

145–180+

Yellowish brown (10YR5/4); light medium clay; coarse to very coarse strong lenticular structure; smooth ped-fabric; highly calcareous; weak consistence when moist; many very coarse distinct yellowish red mottles; few fine manganese flecks and very few extremely coarse calcareous nodules; pH 9.5.
Management considerations
  • High susceptibility to wind erosion
  • Alkaline subsoils with calcareous soft segregations, manganese flecks and argillaceous (clayey) tubules
  • Minor subsoil constraint >50 cm as mottling indicates slightly imperfect drainage
  • Possible plough pan (5-25 cm)
  • Massive surface structure with weak resistance to breaking down makes it vulnerable to wind erosion without stubble and trash retention
  • Medium to very fine roots observed to 50 cm
  • Possible slight to moderate soil structure decline susceptibility due to poorer structure and dispersibility in the subsoil

Site
WLRA130
Sample depth cm
pH
EC
dS/m
NaCl
%
Ex Ca
cmol-/kg
Ex Mg
cmol-/kg
Ex K
cmol-/kg
Ex Na
cmol-/kg
Ex Al
mg/kg
Ex acidity
cmol-/kg
FC
-30okPa
PWP
-1500okPa
KS
%
FS
%
Z
%
C
%
Horizon
H2O
CaCl2
A1
0-5
8.4
8.2
2.3
NA
NA
NA
12
3.3
1.4
3.1
Considerable
5
NA
NA
NA
NA
B21
5-25
8.7
8.4
2.8
NA
NA
NA
13
6
1.2
5.9
Considerable
5
NA
NA
NA
NA
B22
25-50
8.9
8.7
1.9
NA
NA
NA
8.6
7.5
0.7
5.3
Considerable
5
NA
NA
NA
NA
B23K
50-100
9.5
8.9
1.5
NA
NA
NA
3.4
9.9
1.2
6.2
Considerable
5
NA
NA
NA
NA
2B21
100-145
9.4
8.8
1.6
NA
NA
NA
3.2
14
2
11
Considerable
3 (1)
NA
NA
NA
NA
2B22
145-180+
9.4
9
1.5
NA
NA
17
2.2
13
1.9
10
Considerable
3 (1)
NA
NA
NA
NA
Note: NA=not assessed
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