In the 1950s the United States conducted scores of atmospheric nuclear tests at the Nevada Test Site. This article studies the effects of radioactive fallout from nuclear tests on agriculture in regions hundreds of miles from the NTS. While research has shown that this radioactive material posed a health risk near the NTS, little is known about the direct economic effects nuclear testing may have had. I find that fallout from nuclear tests adversely affected U.S. agricultural production, and this result suggests that nuclear testing had a much broader economic and environmental impact than previously thought.