Goji, S.Y. et al. 2026. Design, Formulation, and Kinetic Evaluation of a Slow-Release NPK Fertilizer Derived from Engineered Biochar and Sewage Sludge. Journal of Science Research and Reviews. 3, 5 (Sep. 2026), 134–148. DOI:https://doi.org/10.70882/josrar.2026.v3i5.237.