Studies on chemical composition and feeding value in forage crops. 1. Influence of stage of maturity, nitrogen fertilization and growth phase on chemical composition and digestibility in sorgo forage Miaki, T.; Fujihara, T.; Yamamoto, I. J. Jap. Soc. Grassld Sci 12(3): 146-52 1966 https://eurekamag.com/research/014/688/014688325.php