The Effect of Using L-Arginine as a Feed Additive on Testosterone Levels in Ross 308 Broiler Breeder Roosters: The Effect of Using Arginine on Testosterone Level in Roosters of Broiler Breeders. Journal of Hama University , [S. l.], v. 8, n. 4, 2026. Disponível em: https://journal.hama-univ.edu.sy/huj/article/view/2990. Acesso em: 5 jun. 2026.