Claims and counter-claims of propping up and tearing apart the industry were shot across the table as Liberal, Labor and Greens foes crunched the numbers in the government's first budget.

The afternoon session sizzled from the start, with Resources Minister Paul Harriss slamming the former government for "decimating" timber industry jobs and "crippling" saw log and peeler billet production by supporting the Tasmanian Forestry Agreement.

Opposition Leader Bryan Green later seized on a heated exchange over the peace deal to to accuse the Liberals of hypocrisy.

Mr Green played a 2012 television interview with Liberal MP Joan Rylah, in which she hailed the passage of the agreement through Parliament.

"You campaigned on the basis you would withdraw funds from Forestry Tasmania, increase timber volumes available and open forests up so that more logs could be harvested and FT could trade its way out of difficulty," he said.

"Now you're suggesting you've written a letter of comfort [to Forestry Tasmania] and haven't changed the volume at all when it comes to what can be harvested from our forests."

Greens leader Kim Booth told the committee Japanese timber customers may have been misled by Premier Will Hodgman's claims Ta Ann's timber would not be sourced from non-contentious forests.

Mr Harriss refuted the claims and labelled Mr Booth the "green reaper" of the forestry industry.