Formulation Geometric Engineering of Biomass-Based Slow-Release Fertilizers for Nutrient Management in Sapric Peat SoilsHerdhata Agusta, Dhika Prita Hapsari, Hafith Furqoni, Muhammad Ferdiansyah and Habibatul HikmiahE3S Web Conf., 691 (2026) 03004DOI: https://doi.org/10.1051/e3sconf/202669103004