Roy R. Silen
6 publications by Roy R. Silen:
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A Species Improvement Program
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Publication: National Nursery Proceedings - 1956
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Low-Budget Pollen Collector
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Publication: Tree Planters' Notes - Volume 49, Number 3 (2000)
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Report of the Northwest Forest Genetics Association Meeting
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Publication: Tree Improvement and Genetics - Lake States Forest Tree Improvement Conference - 1955
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Reduction of Genetic Base By Sizing of Bulked Douglas-Fir Seed Lots
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Publication: Tree Planters' Notes - Volume 30, Number 1 (1979)
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Reduction of genetic base by sizing of bulk Douglas-fir seedlots
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Publication: National Nursery Proceedings - 1978
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All-pneumatic laboratory seed cleaner successful
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Publication: Tree Planters' Notes - Volume 24, Number 4 (1973)
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