Department for Environment Food & Rural Affairs
Depositing dredging spoil (dredgings) on the banks of the waters it was dredged from and treating it by screening and removing water.
Guidance on depositing waste from dredging inland waters (opens in new tab)
Burning plant tissue and untreated wood waste from joinery or manufacturing in the open air.
Mixing ash back into the soil to return some of the nutrients from burnt crops and vegetation.