Oyster shells have been given a second life as they can now be processed and used as fertilisers in NSW.

The recycling oyster shells by turning them into fertiliser could be described as win-win.

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Changes to state regulations in October mean the non-composting waste oyster shell can now be dried, processed and applied to land to improve soil health and reduce acidity.

The shell contains 92 per cent calcium carbonate. This means the shells increase the pH of acidic soils, increasing a plant's ability to take up micronutrients and reducing the amount of acidic runoff.

So instead of e

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