PrimayudaA., SuriadikusumahA., and SolihinM. A., “Identifying Pyrite Layer Depth and Its Association to Oil Palm Health and Productivity (Elaeis guineensis Jacq.) ( A Case Study at PT Sawit Sumbermas Sarana Tbk’s Oil Palm Plantation )”, J. Il. Tan. Lingk., vol. 24, no. 1, pp. 6-13, Mar. 2022.