Cone Production of Western White Pine Seedlings and Grafts

摘要

Grafts of western white pine planted in a seed orchard within the white pine type produced 6 cones per tree 11 years after grafting; grafts of the same families in a breeding arboretum located on a grassland habitat produced 1.6 cones per tree 14 years after grafting. Seedlings in the breeding arboretum produced 1.2 cones per tree at 12 years of age. Placement of seed orchards of western white pine is discussed.