The effect of local minerals on the productivity of meat chickens Khanibek Daurenbekov, Aset Zhilkibaev, Bauyrzhan Asylbekov, Lazzat Fayzullayeva and Aksaule Iskakova E3S Web Conf., 614 (2025) 03003 Published online: 07 February 2025 DOI: 10.1051/e3sconf/202561403003