Ruseva, A. et al. 2025. Assessment of the ecological state and health of oil-contaminated Luvic Phaeozems Albic, Gleyic Albeluvisols, and Greyic Phaeozems after remediation by biochar. SAINS TANAH - Journal of Soil Science and Agroclimatology. 22, 1 (Jun. 2025), 107–118. DOI:https://doi.org/10.20961/stjssa.v22i1.93200.