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Cyril George Hopkins

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For Better Crops (1911)
For Better Crops
For Better Crops
For Better Crops (1911)
For Better Crops (1911)
For Better Crops (1911)
Soil Fertility and Permanent Agriculture
Composition and Digestibility of Corn Ensilage, Cow Pea Ensilage, Soja Bean Ensilage, and Corn-Fodder (Classic Reprint)
The Farm That Won't Wear Out
University of Illinois Agricultural Experiment Station Bulletin No. 94 Nitrogen Bacteria and Legumes; With Special Reference to Red Clover, Cowpeas, Soy Beans, Alfalfa, and Sweet Clover, on Illinois Soils
The Farm That Won't Wear Out
The Chemistry of the Corn Kernel (Classic Reprint)
Soil Fertility Laboratory Manual
Soil Fertility and Permanent Agriculture
Soil Fertility and Permanent Agriculture (Classic Reprint)

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