Effects of nitrogen and shearing treatments on growth and quality of Douglas-fir Christmas trees in western Washington
By: Darrell Turner.
Contributors: Washington State University. College of Agriculture. Research Center.
Series: Bulletin / College of Agriculture Research Center, Washington State University -- 875; Bulletin (Washington State University. College of Agriculture. Research Center) -- 875.
Publisher: College of Agriculture Research Center, Washington State University
Published: 1979
Place of publication: Pullman
Language: eng
Number of pages: 10
Subjects: Christmas tree growing -- Washington (State); Douglas fir -- Pruning; Douglas fir -- Fertilizers
Notes: Cover title.

"April, 1979"--P. [2] of cover.

Includes bibliographical references (p. [10]).