soil slotting to ameliorate subsoil limitations to crop production first presented in 1991
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Soil Slotting to ameliorate subsoil limitations to crop production (first presented in 1991). N. S. Jayawardane , ex CSIRO, Division of Land and Water, GPO Box 1666, Canberra, ACT 2601, Australia. G. Kirchhof*, ex NSW Agriculture, PMB 944, Tamworth 2340, Australia. [email protected]

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soil slotting to ameliorate subsoil limitations to crop production first presented in 1991

Soil Slotting to ameliorate subsoil limitations to crop production(first presented in 1991)

N. S. Jayawardane, ex CSIRO, Division of Land and Water, GPO Box 1666, Canberra, ACT 2601, Australia.

G. Kirchhof*, ex NSW Agriculture, PMB 944, Tamworth 2340, Australia. [email protected]

J. Blackwell, ex CSIRO, Division of Land and Water, PMB 3, Griffith, NSW 2380, Australia. Currently ILWS Charles Sturt University, Wagga

what is slotting
What is slotting
  • Segmental deep loosening technique to reduce recompaction
  • Deep mixing and placement of ameliorants
slot formation
Slot formation

after Jayawardane et al. 1995

water logging
Water logging

Not slotted

Slotted

air filled porosity
Air filled porosity

after Jayawardane and Chan, 1994

ameliorant mixing
Ameliorant mixing

after Jayawardane et al., 1995

recompaction
Recompaction

after Blackwell et al. 1989.

(cm)

root growth in acid soils
Root growth in acid soils

Undisturbed

subsoil

Fully ameliorated slot

is there a future in soil slotting
Is there a future in soil slotting?
  • Rehabilitation of severely degraded soils
  • Sludge slotting on forestry lands for sludge disposal
  • Potential uses currently restricted to high value crops
  • Adoption of slotting hampered by cost
  • Potential use for installing a lime-slot around acid-sulphate lands, to neutralise discharge
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