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Capability

Capability and delivery record

The four remediation stages as case studies: what was done, what it produced, with photographs taken at the time.

Stage 1 · Dec 2023 – Feb 2024

Infrastructure and subsoil remediation

What was done

Digging ponds, raising planting beds, building the irrigation and drainage system, constructing perimeter dykes, tilling and liming to reduce acidity.

Measured outcome

Core infrastructure in place. Localised waterlogging dropped noticeably and the subsoil began to stabilise.

  • Abandoned acid sulfate land before remediation, bare ground with sparse weeds
    The acid sulfate land as we found it
  • Widely flooded land, still water reflecting the sky
    Waterlogged conditions
  • The first planting beds mounded up above the waterline
    Starting to raise the beds

Stage 2 · Mar–Dec 2024

Biomass growth and organic matter build-up

What was done

Straw mulching, planting banana and grasses for biomass, growing pineapple, cassava and legumes, adding compost and microbial inoculants, trialling short-cycle vegetables.

Measured outcome

Soil turned darker, looser and better at holding moisture. Beneficial microorganisms began to appear.

  • Pipes and channels under construction across the site
    Building the irrigation system
  • Tractor turning over soil on the raised beds
    Tilling to remediate the soil
  • Straw spread across the beds to retain moisture and limit acid rising
    Straw mulching to hold moisture

Stage 3 · Jan–Dec 2025

Stabilising the soil ecosystem

What was done

Adding biochar, trialling magnetised water, planting papaya, red-flesh jackfruit and vegetables. The crops came on well and papaya was near harvest when, in October 2025, a flood larger than the 2024 one overtopped the dyke.

Measured outcome

Almost a total loss, with only the first batch of green papaya sold in time. But earthworms and beneficial insects had increased markedly, and the infrastructure held where it mattered: no bank collapse, no bed erosion. Once the water drained, planting could start again without rebuilding anything.

  • A handful of loose, dark soil, a world away from the pale acid ground we started with
    Soil clearly better in colour, structure and organic matter
  • Beds evenly covered in green, the system running steadily
    Beds settled in, vegetables doing well
  • Tall papaya trees with dense green canopies on the remediated ground
    Papaya growing green and strong

Stage 4 · Jan–Jun 2026

Validating production capability

What was done

Planting 800 cucumber and 800 okra plants, plus bitter melon, bottle gourd, luffa, winter melon, winged bean and brown eggplant on the remediated soil.

Measured outcome

Harvested 2,750 kg of produce — the first profitable crop since remediation began.

  • Green shoots returning to ground that has just come through the flood
    After the flood, the land comes back
  • Fruit trees in fresh green growth on the very land the flood had swallowed
    After the flood — the orchard green again
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