Breeding for Biomass and Beyond: Cover crop breeding progress, potentials, and farmer participationSolveig Hanson, Cornell UniversitySoil, Seed, Field CropsCover cropping offers an array of soil health and farm-system resiliency benefits, but much of the seed used for cover cropping is of unidentified origin and marketed as "variety not stated," such that growers cannot rely on its suitability for cover crop use or for their climate. The Cover Crop Breeding Network develops fall-sown legume cover crops and cereal rye for traits like winter hardiness, early vigor, high biomass, disease resistance, early flowering, seed yield, and soft seed. Solveig will describe the network's progress in breeding winter pea, hairy vetch, crimson clover, and cereal rye for traits that optimize cover cropping systems, including our first variety releases and efforts to offer improved cover crop germplasm through both formal and informal seed system channels. This fall, the CCB Network has launched on-farm winter pea variety trials, which include several Ontario growers. Solveig – along with any participating farmers in attendance – will describe the trials and welcome ideas and input for future participatory cover crop breeding.