Abstract
In No. 32 of the Reports of the Swedish Institute of Experimental Forestry (1940-41) (Centraltryckeriet, Esselte A.-B., Stockholm, 1941), Erik Bjorkman in a paper entitled “Mycorrhiza in Pine and Spruce Seedlings grown under Varied Radiation Intensities in Rich Soils with or without Nitrate Added” gives the results of a study of the root and mycorrhiza development of young pine (Pinus sylvestris) and spruce (Picea excelsa) grown in eight different soils-most of them soils rich in nutrients -under different light conditions, with or without available nitrogen added up to very high doses. These two species are commercially the most im portant of the timbers in the Swedish forests. The study forms part of an investigation planned by Prof. H. Hesselman, who had already briefly reported in 1939 on its general layout and mainr results. Some of the data reported used by the author are borrowed from a forthcoming publication by Prof. Hesselman.
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EXPERIMENTAL FORESTRY IN SWEDEN. Nature 158, 71 (1946). https://doi.org/10.1038/158071a0
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DOI: https://doi.org/10.1038/158071a0