NURYENTI, I.; SULISTYANI, D. P.; BERNAS, S. M. Kandungan Hara N, P, K pada Gawangan dan Jalan Panen Perkebunan Kelapa Sawit. Jurnal Lahan Suboptimal : Journal of Suboptimal Lands, [S. l.], v. 5, n. 2, p. 219–224, 2018. DOI: 10.33230/JLSO.5.2.2016.180. Disponível em: https://jlsuboptimal.unsri.ac.id/index.php/jlso/article/view/180. Acesso em: 27 sep. 2021.