Asroh, A., Nurlaili, N. and Fahrulrozi, F. 2016. Produksi Tanaman Jagung (Zea mays L.) pada Berbagai Jarak Tanam di Tanah Ultisol. Jurnal Lahan Suboptimal : Journal of Suboptimal Lands. 4, 1 (Oct. 2016), 66–70. DOI:https://doi.org/10.33230/JLSO.4.1.2015.146.