@article {Copes:1 January 1994:0885-6095:5,
	author = "Copes, D. L.",
	author = "Bordelon, Mike",
	title = "Effects of Tree Spacing and Height Reduction on Cone Production in Two Douglas-Fir Seed Orchards",
	journal = "Western Journal of Applied Forestry",
	volume = "9",
	year = "1 January 1994",
	abstract = "Two treatments involving tree spacings (12 and 24 ft) within rows spaced 24 ft apart and height control (topped or not topped at 20 ft) were evaluated in 17- and 22-yr-old coast Douglas-fir (Pseudotsuga menziesii var. menziesii) seed orchards. Treatment differences for cone production were not significant because of the large tree-to-tree variation in cone production and, at one orchard, the confounding of location with treatment. Cone production in 1990 averaged slightly more than 2 bushels per tree (range 0 to 11.7 bushels). Average production per 96 linear ft of orchard row was 14.8 bushels. West. J. Appl. For. 9(1):5-7.",
	pages = "5-7(3)",
	url = "http://www.ingentaconnect.com/content/saf/wjaf/1994/00000009/00000001/art00004"
}