A genetically-engineered soybean root, left, which has roots that grow downward and with more root mass, is shown next to a conventional soybean root Tuesday, Sept. 1, 2026, at a research farm in Urbana, Ill. (AP Photo/Joshua A. Bickel)

Root samples of genetically-engineered soybeans dry after collection Tuesday, Sept. 1, 2026, at a research farm in Urbana, Ill. (AP Photo/Joshua A. Bickel)

Preyanka Mehta, a research associate at Cquesta, removes soil from a genetically-engineered soybean root Tuesday, Sept. 1, 2026, at a research farm in Urbana, Ill. (AP Photo/Joshua A. Bickel)

Wolfgang Busch, director of the Harnessing Plants Initiative at the Salk Institute, takes a photograph of genetically-engineered soybeans Tuesday, Sept. 1, 2026, at a research farm in Urbana, Ill. (AP Photo/Joshua A. Bickel)

A caterpillar crawls on the leaf of a genetically-engineered soybean plant Tuesday, Sept. 1, 2026, at a research farm in Champaign, Ill. (AP Photo/Joshua A. Bickel) CORRECTS: Spelling of Champaign from Champagne

Genetically-engineered soybeans grow Tuesday, Sept. 1, 2026, at a research farm in Champaign, Ill. (AP Photo/Joshua A. Bickel) CORRECTS: Spelling of location to Champaign from Champagne

A device measures carbon levels in soil Tuesday, Sept. 1, 2026, at a research farm in Champaign, Ill. (AP Photo/Joshua A. Bickel)

Wolfgang Busch, director of the Harnessing Plants Initiative at the Salk Institute, holds up a soybean root that was genetically-engineered to grow downward Tuesday, Sept. 1, 2026, at a research farm in Urbana, Ill. (AP Photo/Joshua A. Bickel)