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Commercial grants were received from the Agricultural Supply Company, Grand Forks, North Dakota, the Rohm and Haas Company and the Tennessee Corporation.
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Hoyman, W.G. The effect of zinc-containing dusts and sprays on the yield of potatoes. American Potato Journal 26, 256–263 (1949). https://doi.org/10.1007/BF02883860
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DOI: https://doi.org/10.1007/BF02883860