Cattle Rumen Content, Rice Husk and Cow Horn Biochars As Amendments for Enhanced Remediation of Petroleum-Hydrocarbon-Contaminated Soil: Physicochemical Characterization and Performance Evaluation. J. Nig. Soc. Phys. Sci. 2026, 8 (2), 3388. https://doi.org/10.46481/jnsps.2026.3388.