Douglas-Fir Orchards: Managing Cone and Seed Insects

By Zhang Yanli   Schowalter Timothy D.  

Journal of Forestry, Vol. 95, Iss. 3, 1997-03 ,pp. : 28-32

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Pollen Dispersal Considerations for Douglas-Fir

By Silen Roy R.  

Journal of Forestry, Vol. 60, Iss. 11, 1962-11 ,pp. : 790-795

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Effect of Photoperiod and Light Quality on Germination of Douglas-Fir Seed

By Johnson Le Roy C.   Irgens-Moller Helge  

Forest Science, Vol. 10, Iss. 2, 1964-06 ,pp. : 200-205

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Effects of Tree Spacing and Height Reduction on Cone Production in Two Douglas-Fir Seed Orchards

By Copes D. L.   Bordelon Mike  

Western Journal of Applied Forestry, Vol. 9, Iss. 1, 1994-01 ,pp. : 5-7

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Fate of Sown Douglas-Fir Seed

By Lawrence William H.   Rediske J. H.  

Forest Science, Vol. 8, Iss. 3, 1962-09 ,pp. : 210-218

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