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Proceedings of Past Forest Nursery Association Meetings:

Green Manure Effects on Soilborne Pathogens
Stone, Jeffrey K.; Hansen, Everett M.
1993: St. Louis, MO
Green manures from cover crops
incorporated into nursery soils stimulated growth of pathogenic soil fungi. Bare fallow treatments reduced populations of soil pathogens to levels comparable to standard chemical fumigation. Seedling disease and quality were adversely affected by higher levels of pathogens in unfumigated cover cropped treatments, but were comparable in unfumigated bare fallow and standard chemical fumigation treatments.
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