ill.; Progress report title; The study area includes the west slope of the Cascades Mountains from the Columbia River south to around Medford, Oregon. Forestry study covers the northern two-thirds of the province which is north of the southern boundary of the Willamette National Forest. Study covers portions of the following national forests of Willamette, Mt. Hood, and Umpqua and other federally or privately owned lands. Forests include Douglas-fir, western mountain hemlock located below 4400 feet and those above 4400 feet, the mountain hemlock and true firs, also referred to as balsam firs; Includes bibliographic references