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In northwestern Ontario, large numbers of container seedlings are overwintered either outdoors or in frozen storage. Seedlings stored outdoors are subject to severe conditions overwinter and are prone to considerable damage, whereas freezer storage is expensive and has its own associated risks. To examine an alternative method for overwintering black spruce (Picea mariana (Mill.) B.S.P.) container stock, we tested different configurations of a rigid Styrofoam® SM insulating blanket. Third-year outplanting results showed no differences in growth or survival performance between controlled frozen and Styrofoam® SM stored stock. Tree Planters' Notes 45(2):47-52; 1994

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Author(s): Robert E. Whaley, Lisa J. Buse

Publication: Tree Planters' Notes

Section: Technical Tips

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