The forestry body for the Green Triangle region, which covers south-east South Australia and south-west Victoria, has reviewed its practices to better protect koalas.
Earlier this year, the ABC's 7.30 program revealed a high number of koalas were being killed or seriously injured at blue gum plantations during harvesting.
The Green Triangle Regional Plantation Committee says it is appalled by the wildlife deaths and has created a new set of guidelines.
The committee's Laurie Hein says more work will be done on understanding koala populations before harvest begins.
"So there's going to be a lot more work going into the planning side, so obviously understanding the koala density, so doing [a] pre-harvest survey to estimate the koala populations, obviously providing that data to the relevant Government agencies," he said.
"There'll be trees that have koalas present will be marked with paint, obviously to alert the operators.
"There'll be a minimum requirement of the number of trees retained around the koala tree and so obviously then there will be continual survey work."