Technical Report

 

Some guidelines for planting 2-0 Douglas-fir in Oregon : a preliminary report Public Deposited

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https://ir.library.oregonstate.edu/concern/technical_reports/t435gf37v

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  • The Dwight L. Phipps State Forest Nursery at Elkton annually supplies 22 million 2-0 Douglas-fir seedlings to Oregon land managers. Some managers report excellent success in planting, but others report failures, particularly when planting late in the season. In some instances poor survival seemed to be related to storage. Physiological changes that affect survival are known to occur in Douglas-fir planting stock, but the effects of environmental conditions on those physiological changes in seedlings grown at the State Forest Nursery have not been studied. Storage of seedlings is a common practice, but the effects of storage on physiological conditions vary with season. For example; seedlings lifted in October cannot be stored without reducing subsequent survival, but seedlings lifted in January can be stored safely for many weeks. An experiment was conducted to measure the effect of lifting date and duration of storage on subsequent growth and survival of Douglas-fir seedlings. Also, a new type of storage container (a closed box), which was being used for the first time at the nursery, was compared with the one used previously in terms of seedling survival.
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