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Foliar nutrient concentrations in balsam fir as affected by soil drainage and methods of slash disposal

Miroslaw M. Czapowskyj

出版	Department of Agriculture, Forest Service, Northeastern Forest Experiment Station, 1979
URL	http://books.google.com.hk/books?id=GVYDznyyXl0C&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN