ALNUS-RUBRA NODULATION CAPACITY OF SOIL UNDER 5 SPECIES FROM HARVESTED FOREST SITES IN COASTAL BRITISH-COLUMBIA

Nodulation of Alnus rubra seedlings after inoculation with soil from u nder A. rubra, Betula papyrifera. Rubus lacianutus, R. spectabilis, an d R. ursinus on 2 recently harvested sites was compared. Nodulation ca pacity was low compared to other published reports, ranging from 0 to 18.9 infective units cm(-3) of soil and was significantly affected by the site and plant species. Nodulation capacity of soil under alder wa s significantly higher than under all other species except R. spectabi lis, regardless of site. The lowest nodulation capacity was found in s oil under B. papyrifera.