Guttenberg, Iowa, Mississippi River Valley, La Crosse, Wis., Dexter, Postcard

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Back of PostcardThe postcard features an image of contour farming in Guttenberg, Iowa, a practice widely used in the Mississippi River Valley to prevent erosion of topsoil. Contour farming involves plowing across a slope following its elevation contours, which helps slow down water runoff and reduce soil erosion.

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