This article in digital magazine Undark explores the development of Kernza, a perennial grain intended to produce food while reducing soil erosion and nitrogen loss. Despite research and development efforts, Kernza yields per hectare still remain well below annual wheat yields - a problem if perennial grains are not to lead to the expansion of farmland.
Read more here. See also the TABLE explainer What is sustainable intensification? The article draws on the paper Progress Towards Perennial Grains for Prairies and Plains, from the special issue Biomimicry and nature-based solutions.