Hartono, A. et al. 2024. Determination of the Critical Limit of Phosphorus for Shallot Growth in Brebes Regency, Central Java. Jurnal Ilmu Tanah dan Lingkungan. 26, 1 (Apr. 2024), 40–47. DOI:https://doi.org/10.29244/jitl.26.1.40-47.