Determining the total acreage of each soil by use of the planimeter (Scale of Base 1/31,680)

Image (illustration or photograph) for this item, linking to higher res image.

Citation

Unknown. “Determining the total acreage of each soil by use of the planimeter (Scale of Base 1/31,680).” Special Collections, USDA National Agricultural Library. Accessed March 28, 2024, https://www.nal.usda.gov/exhibits/speccoll/items/show/8235.