Do not use sewage sludge that has not been properly sampled and analysed on arable soils Concentrations of potentially toxic elements (PTEs) are kept below maximum permissible limits on arable soils Maintain/improve chemical soil status
Reduce concentrations of toxic elements within crops Food safety - toxic elements
Reduce crop damage from phytotoxic elements Maintain / improve crop yields Increase farm income Economic viability
Efficient use of resources - energy
Ensure food is available to meet consumer demand