Biomass Magazine, Dec. 26, 2013, by Sue Retka Schill.
http://www.biomassmagazine.com/articles/9851/10-year-trials-show-10-ton-yields-for-miscanthus-in-Illinois

"Illinois researchers reported results from a decade of field trials with miscanthus, the first plots to be planted in the U.S. The average annual yield of miscanthus grown in seven Illinois locations over a period of eight to 10 years was 10.5 tons per acre, compared with 4.5 tons per acres for switchgrass grown in the side-by-side trials."