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HOR4

    Site Code
HOR4

    Location

South Wonwondah, western Victoria

    Landform

Plain

    Geology

Quaternary Shepparton Formation: fluvial silt, sand and minor gravel

    Element

Flat

    Aspect

0
Horizon
Depth (cm)
Description

A1

0–15

Greyish brown (10YR5/2); light clay; subplastic; cracking and slightly self-mulching surface condition; moderate coarse subangular blocky structure; very strong consistence (dry); pH 6.5; clear change to

B2

15–70+

Grey (10YR5/1); heavy clay; subplastic; moderate very coarse prismatic structure; very strong consistence drypH 7.6.
Management considerations
  • Cracking clay profile, high clay percentage
  • Neutral thin surface soil and subsoil, alkaline at depth
  • Structured surface, occasional self mulching feels lighter than lab data suggests (subplastic)
  • Subsoil is sodic and may be strongly sodic at depth Subsoil does disperse; highly dispersible.
  • Cracking may allow air and seasonal moisture to penetrate
  • Very strong consistence when dry, implications for compaction and implement use
  • Landform element, flat: poor site drainage



Site
HOR4
Sample depth cm
pH
EC
dS/m
NaCl
%
Ex Ca
cmol-/kg
Ex Mg
cmol-/kg
Ex K
cmol-/kg
Ex Na
cmol-/kg
ESP
N
Oxidised Organic C
7.8FC
-30okPa
2.7PWP
-1500okPa
NAKS
%
NAFS
%
NA Z
%
NAC
%
Horizon
H2O
CaCl2
A1
0–15
6.5
NA
0.04
NA
8.9
6.4
0.5
1.0
NA
NA
27.3
19.3
NA
NA
NA
NA
B2
15–70+
7.6
NA
0.09
0.2NA
10.1
8.8
0.8
2.6
NA
NA
35.0
15.4
NA
NA
NA
NA
Note: NA=not assessed
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