Faradila, Razhika, Harsono, Soni Sisbudi, AND Lasari, Yuni. " Karakteristik Biochar Limbah Bubuk Kopi Produksi UMKM Kopi Tirtoyudo, Malang Selatan" Jurnal Ilmiah Teknologi Pertanian Agrotechno [Online], Volume 9 Number 2 (4 February 2025)