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The occurrence and character of different types of ectomycorrhizas of birch seedlings were investigated in soils from three naturally regenerating birch stands: a forest site, a clear-cut site, and a site recently disturbed by plowing. Birch grown in soil from an evergreen broad-leaved forest without birch was also studied. The rate of ectomycorrhizal formation in the soil from the evergreen broad-leaved...
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