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Fertilizer Tests with Tobacco, with Special Reference to Effects of Different Rates and Sources of Nitrogen and Potash

David Edward BrownDonald E. WatkinsHarold Sloan McConnellJames Edward McMurtreyRobert Andrew JehleRoy Harrison WaiteWilliam Beck KempSamuel Henry DeVaultGeary Francis EppleyRoger F. BurdetteWilliam Paul WalkerClaribel WelshWilliam Meadow Lunn

出版	University of Maryland, Agricultural Experiment Station, 1933
URL	http://books.google.com.hk/books?id=leZQAQAAMAAJ&hl=&source=gbs_api