Individual tree tops form the forest canopy creating a giant living solar collector. When the solar collector is intact, continuous, and healthy, you can grow a lot of timber!
Heavy timber harvests destroy the forest canopy, and it takes many years to rebuild itself before healthy growth returns.
Our harvest of one tree, per acre, per year, removes only about 4% of the canopy. Including natural disturbances, we try and keep our canopy surface at 80-90% complete.