King Island Natural Resource Management

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Acid Sulphate

Acid sulfate soil (ASS) is the common name given to soils and sediments containing iron sulfides, the most common being pyrite. When exposed to air due to drainage or disturbance, these soils produce sulfuric acid, often releasing toxic quantities of iron, aluminium and heavy metals.
Pyrite (FeS2) found in acid sulfate soils is not visible to the naked eye.

For more information: Tasmanian Acid Sulfate Soil Management Guidelines