The Federal government has sought to allay community concerns about tree farms - which have jumped 20 per cent in five years in Western Australia to reach almost 400,000 hectares - releasing a report on the impact of timber plantation.

The Federal government has sought to allay community concerns about tree farms - which have jumped 20 per cent in five years in Western Australia to reach almost 400,000 hectares - releasing a report on the impact of timber plantation.