obsolete a forest, composed of normal stands, that has reached a conceptual ideal in stocking and age- and size-class distribution —note 1. a particular forest can be compared with a normal forest to identify treatments that may be needed for sustained timber management —note 2. a normal forest has a normal age-class distribution, i.e., a complete series of age classes that permits equal volume (normal) yields from annual or periodic fellings under the given rotation and silvicultural system; the growth of a normal forest is called the normal incrementThis definition last updated 07/21/2008