SUTARTA, E. S.; WIRATMOKO, D.; AKOEB, E. N. Soil Fertility, Oil Palm Growth and Productivity on Three Pyritic Depths. Jurnal Penelitian Kelapa Sawit, [S. l.], v. 28, n. 2, p. 71–84, 2020. DOI: 10.22302/iopri.jur.jpks.v28i2.104. Disponível em: http://jurnalkelapasawit.iopri.org/index.php/jpks/article/view/104. Acesso em: 25 aug. 2026.