Annals of Botany 34: 239-244, 1970
© 1970 Annals of Botany Company
RESEARCH-ARTICLE |
Nitrogen Fixation in the Phyllosphere of the Douglas Fir, Pseudotsuga douglasii
Department of Biological Sciences, University of Lancaster
Accepted: 31 July 1969
Nitrogen-fixing bacteria have been isolated from the leaf surfaces of the Douglas Fir. 15N tracer studies have shown that these bacteria fix nitrogen in culture and in the field on the trees. A considerable proportion of the annual requirement for nitrogen by Douglas Fir may be provided by nitrogen-fixing bacteria on the leaves and in the soil.
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