About a dozen objections to Tasmania's World Heritage Area nomination have been sent to the UNESCO committee in Paris.
The Federal Environment Minister Tony Burke has asked the International World Heritage Committee to protect 170 000 hectares of land on the eastern border of the existing World Heritage area.
The President of the Huon Resource Development Group, George Harris, said special timber groups, farmers and private landowners are among those who have filed objections.
Mr Harris said there are several concerns about the nomination.
"Principally the fact that the nominated extension is far greater than a simple boundary extension and far greater in its consequences so it's a mis-description," he said.
The Greens Leader Christine Milne said the objections are embarrassing and could undermine Tasmania's forestry peace deal.
"Its failure to proceed and to blow this process up in the World Heritage Committee they know full well would destroy the whole of the peace deal," she said.