Researchers at the Agriculture Department laughed in disbelief last summer when they received a memo about a new requirement: Their finalized, peer-reviewed scientific publications must be labeled “preliminary.” The July 2018 memo from Chavonda Jacobs-Young, the acting USDA chief scientist, told researchers their reports published in scientific journals must include a statement that reads: “The findings and conclusions in this preliminary publication have not been formally disseminated by the U.S. Department of Agriculture and should not be construed to represent any agency determination or policy.” The claim that reports are not “formally disseminated” runs counter to the USDA policy that “permits and, indeed, encourages researchers to publish in scientific journals,” Offutt said. The disclaimer has been added to studies published in peer-reviewed journals since at least November. These include a report on pestilent moth larvae caught at the U.S. border, an analysis of food poisoning from chicken livers and a study of the SNAP food assistance program and childhood asthma.“Any scientist reading a journal, seeing that, would be very confused by this statement,” said Ed Gregorich, editor of the Journal of Environmental Quality, which frequently publishes research by USDA scientists.Peer-reviewed articles are the gold standard for sharing scientific information, Gregorich said. After a research team submits an article to a journal, the editors ask other experts in the subject to review the work. Those reviewers, often anonymous, check the study’s experimental designs, statistics and conclusions, and they can ask for revisions or reject the article if it is not scientifically sound.