Home Publications Tree Planters' Notes Tree Planters' Notes Volume 23, Number 3 (1972) Helicopter Seeders Can Damage Conifer Seed

Helicopter Seeders Can Damage Conifer Seed

Helicopters are used in many parts of the country to broadcast tree seed on cutover, burned, or nonstocked lands. To determine if seed germination is reduced when helicopter seeders are used, the Forest Service tested three seeding systems commonly used in the Pacific Northwest. Tests were conducted in western Oregon in spring 1969 using Douglas-fir (pseudotsuga menziesii) and noble fir (abies procura) seed. System No. 1 dispersed seed through a slinger unit consisting of two 16-inch discs separated by five vertical vanes. Seed entering between the two spinning discs was forced outward in all directions. System No. 1 dispersed seed through a slinger unit consisting of two 16-inch discs separated by five vertical vanes. Seed entering between the two spinning discs was forced outward in all directions.


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Author(s): Ronald M. Stoleson, Richard G. Hallman

Publication: Tree Planters' Notes - Volumes 23, Number 3 (1972)

Volume: 23

Number: 3

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