SINAGA, D. P.; DWI PURBAJANTI, E.; ADI KRISTANTO, B. The Effect of Magnesium, Boron, and NPK Fertilizer on the Growth of Pre-Nursery Oil Palm (Elaeis guineensis Jacq). Jurnal Online PERTANIAN TROPIK, v. 7, n. 2, p. 262-271, 28 Dec. 2020.