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Proceedings of Past Forest Nursery Association Meetings:

Effect of the Timing of Cold Storage on Cold Hardiness and Root Growth Potential of Douglas-fir
Burr, Karen E.; Tinus, Richard W.
1988: Vernon, CAN
Container grown Douglas fir seedlings were cold acclimated in growth chambers over 20 weeks. At weekly intervals, cold hardiness and root growth potential (RGP) were measured, and additional seedlings were placed in 1C storage for 4 weeks. Cold hardiness and RGP were reassessed following storage. Cold hardening continued in storage regardless of when during acclimation seedlings were stored. However, the rate of cold acclimation increased or decreased during storage depending on the level of cold hardiness at the start of the storage period. RGP generally declined during storage, though occasionally remained the same or increased without apparent relation to level of cold hardiness.
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