Nitrogen fixation by scotch broom (Cytisus scoparius L.) and red alder (Alnus rubra Bong.) planted under precommercially thinned Douglas fir (Pseudotsuga menziesii (Mirb.) Franco)
By: by Ole Terrence Helgerson.
Published: 1981
Language: eng
Number of pages: 81
Subjects: Nitrogen -- Fixation.
Notes: Typescript (photocopy).

Thesis (Ph. D.)--Oregon State University, 1981.

Bibliography: leaves 79-81.