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Proceedings of Past Forest Nursery Association Meetings:

Cold Hardiness Measurement to Time Fall Lifting
Richard W. Tinus, Karen E. Burr
1997: Bemidji, MN
Cold hardiness measurement has been found to be one of the most informative physiological
tests developed over the last 15 years, and it is precise and quick enough to guide management
decisions. The relationships among cold hardiness and other physiological attributes important to lifting
and storage success are known for some species such as ponderosa pine and Douglas-fir, but this
information is lacking for many other species important in reforestation. The objective of this study was
to determine the relationship between cold hardiness at time of fall lifting and outplanting success. We
sought a threshold of cold hardiness that would indicate that seedlings were ready to lift and store, as
others have found (cf. Simpson 1990).
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