Evaluation of Particle Size, Total Flavonoid, and Antioxidant Activity of Onion Peel (Allium cepa L.) in Different Forms as a Poultry Feed AdditiveMiftahul Jannah and Irfan H. DjunaidiBIO Web Conf., 218 (2026) 01003DOI: https://doi.org/10.1051/bioconf/202621801003