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The Effects of Rotations, Fertilizers, Lime and Organic Matter on the Production of Corn, Wheat and Hay

Thomas Kennerly WolfeMichael Smith Kipps

出版	Virginia Polytechnic Institute. Virginia Agricultural Experiment Station, 1927
URL	http://books.google.com.hk/books?id=9zEnAQAAMAAJ&hl=&source=gbs_api