(Phys.org)—A trio of researchers at Kansas State University has found that sorghum yields begin to drop once a certain average high temperature is reached and continue to drop as temperatures increase. In their paper published in Proceedings of the National Academy of Sciences, Jesse Tack, Jane Lingenfelser and S. V. Krishna Jagadish described their study of weather patterns and sorghum yields over the past 30 years and what they found. They also offer some ideas on ways to prevent reductions in crop yields as the planet continues to warm.