As a result, the productivity of the remaining working forest will likely have to increase if annual allowable cuts and even flows of harvested wood are to be sustained.
(annual allowable cuts and even flows of harvested wood; are; to be sustained) (annual allowable cuts and even flows of harvested wood; to be sustained; ) (the productivity of the remaining working forest; to increase; )
annual allowable cuts and even flows of harvested wood annual allowable cuts and even flows of harvested wood the productivity of the remaining working forest
are to be sustained to increase
to be sustained