From the National Archives:
[top] World War II poster, 1942
[bottom left] Demand for sugar was high during World War II. It was used both for explosives (to create industrial alcohol) and for beverage alcohol. Posters like this one encouraged farmers to convert their fields to sugar beets.
[bottom right] In wartime, soybeans became important in both North America and Europe as substitutes for other protein foods and as a source of edible oil. This poster from World War II exhorts farmers to grow more soybeans.