Rosalina, F.; Tjahyandari, D.; Darmawan, D. The Potential Of Nickel Slag With Humic Substance Addition As Ameliorating Materials on Gajrug Red-Yellow Podzolic. Sains Tanah J. Soil Sci. Agroclimatology 2018, 15 (1), 61-68. https://doi.org/10.15608/stjssa.v15i1.17814.