I think the harvesting tends to try to target the older balsam fir anyway, the most vulnerable species. J.D. Irving is the company that's the most active in terms of planting. In some of their privately owned land bases they've really targeted switching the balsam fir into spruce, which is less vulnerable and more productive. On their Black Brook district land base, they've done that for most of the areas.
If there's a lot of balsam fir there, it's hard to get rid of it all, so pre-commercial thinning of young firs is also done in some other areas. It makes it less vulnerable, but not non-vulnerable. I think it is being used.