@article {DeBell:1 September 1986:0015-749X:643,
	author = "DeBell, Dean S.",
	author = "Silen, Roy R.",
	author = "Radwan, M. A.",
	author = "Mandel, Nancy L.",
	title = "Effect of Family and Nitrogen Fertilizer on Growth and Foliar Nutrients of Douglas-fir Saplings",
	journal = "Forest Science",
	volume = "32",
	year = "1 September 1986",
	abstract = "Family x fertilizer-interactions were evaluated in a split-plot experiment involving 12 open-pollinated families of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco). The fertilizer treatment was applied when trees were 12 years of age, and response was measured as cumulative volume growth during the next 4 years. Volume growth varied among families and was increased by an average of 7 percent by application of 224 kg ha<SUP>-1</SUP> N as urea. Foliar concentrations of some nutrients also differed significantly (P &#8804; 0.05) among families and between fertilizer treatments. The family x fertilizer interaction was not significant for any growth or foliar nutrient variable. Forest Sci. 32:643-652.",
	pages = "643-652(10)",
	url = "http://www.ingentaconnect.com/content/saf/fs/1986/00000032/00000003/art00013"
}