INDAWAN, Edyson; LESTARI, Sri Umi; THIASARI, Nurita. Pemberian Biochar Jengkok Tembakau untuk Meningkatkan Hasil Ubijalar pada Lahan Kering Sub-Optimal. Jurnal Lahan Suboptimal : Journal of Suboptimal Lands, [S. l.], v. 8, n. 1, p. 47–56, 2019. DOI: 10.33230/JLSO.8.1.2019.284. Disponível em: https://jlsuboptimal.unsri.ac.id/index.php/jlso/article/view/284. Acesso em: 19 jun. 2026.