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The Effect of Soil Reaction on the Growth of Tomatoes and Lettuce and on the Nitrogen, Phosphorus and Manganese Content of the Soil and Plant

Emery Myers Emmert

出版	Kentucky Agricultural Experiment Station, University of Kentucky, 1931
URL	http://books.google.com.hk/books?id=a_kmAQAAMAAJ&hl=&source=gbs_api