Treatment duration and time since disturbance affect vegetation development in a young California red fir plantation /

"June 1997."

Timing and duration of release treatments affect vegetation development in a young California white fir plantation /

"March 2001"--P. [2] of cover.

Repeated manual release in a young plantation : effect on Douglas-fir seedlings, hardwoods, shrubs, forbs, and grasses /

Includes bibliographical references (p. 11).