Variation in soil characteristics of ex-coal mining areas in Sawahlunto, West SumatraWelly Herman, Iskandar, Sri Wilarso Budi, Heru Bagus Pulunggono, Andri Syaputra and KurniatiBIO Web Conf., 99 (2024) 05010DOI: https://doi.org/10.1051/bioconf/20249905010