Use of artificial shade to increase survival of Douglas-Fir in the Roseburg area
By:  by Robert Lewis, Curtis J. Ritter, II and Steve Wert
Contributors: United States.  b Bureau of Land Management
Series: Technical note / Bureau of Land Management --  TN 321; United States --  TN 321.
Publisher: Denver, Colo.; Bureau of Land Management
Published: 1978
Language: eng
Subjects: Douglas fir; Forests and forestry
Notes: Includes bibliographical references (p. 8).