Waraningtyas, Indira, Iskandar, and Syaiful Anwar. 2026. “Phosphorus and Potassium Availability in Soil Ameliorated by Different Quality Organic Materials Enriched With Humic Substances”. Jurnal Ilmu Tanah Dan Lingkungan 28 (1): 20-27. https://doi.org/10.29244/jitl.28.1.20-27.