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Proceedings of Past Forest Nursery Association Meetings:

Blackout and Post Planting Bud Phenology in SxS Spruce Seedlings
Hawkins, C.D.B.; Hooge, S.D.
1988: Vernon, CAN
Spruce stock grown under three blackout regimes in 1987 was cold stored over the winter and farm-field planted in May 1988. Blackout treatment did not affect root egress but the longest blackout treatment resulted in earlier spring flush, later fall bud set, and increased the susceptibility of seedlings to freezing temperatures.
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