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Proceedings of Past Forest Nursery Association Meetings:

White Spruce: The Effect of Long-Term Cold Storage Is Partly Dependent on Outplanting Soil Temperatures
Harper, G.; Camm, E. L.; Chanway, C.; Guy, R.
1989: Bismark, ND
Seedlings of Picea glauca were freezer stored for 0 to 30.5 wks. at -5C, and thereafter
grown at three different soil temperatures (3,7,11C). Root growth at 11C increased as seedlings
received up to 14 wks. storage duration, and decreased thereafter. In contrast, root growth at the
lower temperatures simply decreased with storage duration. Root growth performance and
stomatal conductance data both suggest that storage duration greater than 22 wks. can be
detrimental to seedling development.
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