What would corn yields look like if there was a nuclear war?

Each year, farmers produce more than a billion metric tons of corn. As technology advances, researchers are looking at how that could change with nuclear contamination.

Researchers at Penn State University have studied how a nuclear war scenario would play out at nearly 40,000 locations around the world. Using their agro-ecosystem, they found that if five tons of soot were to drop, it would lower corn production by seven percent. On a larger scale, with 165 tons of soot, that number jumps to an 80 percent drop in corn yields.

Researchers say they hope this scenario never happens, but they warn it is always best to prepare for catastrophic events.

Related Stories
Traders say that shift could eventually prompt the USDA to scale back soybean export projections, noting the outlook differs greatly for other grain commodities.
Strong blending demand continues to support ethanol use even as production and exports fluctuate.
Eliza Petry joins the RFD News team with a strong connection to agriculture and a commitment to covering the people and issues that matter most to rural America.
Strong White House backing supports ethanol demand, but timing now hinges on Congress resolving procedural — at the same time as they push toward a spending bill to avert another federal government shutdown.
Corn and soybean exports continue to anchor weekly inspection totals, with China maintaining a visible role, while wheat and sorghum remain more dependent on regional and seasonal demand shifts.
Lewis Williamson of HTS Commodities joined us with an update on the historic winter storm impacts and his outlook on today’s ag markets.
Year-round E15 remains on the table, but procedural caution and competing regional interests pushed action into a slower, negotiated path.
Strong production and rising stocks may pressure ethanol margins unless demand or exports continue to improve.
Congressman Adrian Smith of Nebraska joined us with the latest on efforts to secure year-round E15 sales.

LATEST STORIES BY THIS AUTHOR:

Tariff relief and new trade agreements may temper food costs by reducing import costs.
Lawmakers and experts react to the Administration’s long-awaited announcement of “bridge” aid to stabilize farms and offset 2025 losses until expanded safety-net programs begin in 2026.
Read the U.S. Department of Agriculture’s official press release published on Monday, December 8, 2025.
Joe Peiffer with Ag & Business Legal Strategies advises farmers on end-of-year financial planning, including preparing records, avoiding common credit mistakes, and evaluating equipment purchases for 2026.
Agriculture Shows
Special 3-part series tells the story of the Claas family’s legacy, which changed agriculture forever.
From soil to harvest. Top Crop is an all-new series about four of the best farmers in the world—Dan Luepkes, of Oregan, Illinois; Cory Atley, of Cedarville, Ohio; Shelby Fite, of Jackson Center, Ohio; Russell Hedrick, of Hickory, North Carolina—reveals what it takes for them to make a profitable crop. It all starts with good soil, patience, and a strong planter setup.
Champions of Rural America is a half-hour dive into the legislative priorities for Rural America. Join us as we interview members of the Congressional Western Caucus to learn about efforts in Washington to preserve agriculture and tackles the most important topics in the ag industry on Champions of Rural America!
Featuring members of Congress, federal and state officials, ag and food leaders, farmers, and roundtable panelists for debates and discussions.