Before revision: Another example is the girdling of selective Douglas-fir trees in some Northern California oak woodlands, such as Annadel State Park, in order to prevent that Douglas-fir from massive invasion of the mixed oak woodland.
After revision: Another example is the girdling of selected Douglas-fir trees in some Northern California oak woodlands, such as Annadel State Park, in order to prevent that Douglas-fir from massive invasion of the mixed oak woodland.