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Contour Farming. Saves Soil, Water, Fertilizer.

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Citation

War Boards, U.S. Department of Agriculture. 1943. “Contour Farming. Saves Soil, Water, Fertilizer..” Special Collections, USDA National Agricultural Library. Accessed June 18, 2019, http://www.nal.usda.gov/exhibits/speccoll/items/show/250.