Key environmental and production factors for understanding variation in switchgrass chemical attributes oleh Amber N. Hoover, Rachel Emerson, Marnie Cortez, Vance Owens, Ed Wolfrum, Courtney Payne, John Fike, Jamie Crawford, Ryan Crawford, Rodney Farris, Julie Hansen, Emily A. Heaton, Sandeep Kumar, Hilary Mayton, Danielle M. Wilson