Effect of the addition probiotic Saccharomyces cerevisiae in diet on ammonia gas in pens of ducksDadik Pantaya, Hariadi Subagja, Gayuh Syaikhullah, Tera Fit Rayani, Gilang Ayuningtyas and Anis Usfah PrastujatiBIO Web Conf., 210 (2026) 03005DOI: https://doi.org/10.1051/bioconf/202621003005