SimbolonD.R., SumawinataB. and DjajakiranaG. 2023. The Solubility of Nickel on Mixed Ultramafic Soil with Peat Soil at Saturated and Unsaturated Water Condition. Jurnal Ilmu Tanah dan Lingkungan. 25, 1 (Apr. 2023), 25-29. DOI:https://doi.org/10.29244/jitl.25.1.25-29.