Christian, B. M., Munir, M. and Wicaksono, K. S. (2023) “Study of Soil Chemical Properties on Palm Oil Productivity in PT. Gemilang Sejahtera Abadi in East Kalimantan”, JOURNAL OF TROPICAL SOILS, 29(3), pp. 127–133. doi: 10.5400/jts.2024.v29i3.127-133.