Purnamayani, Rima, Hery Nugroho, and Yardha Yardha. 2016. “Aplikasi Bahan Organik Dan Mulsa Pada Lahan Replanting Kelapa Sawit Dengan Tanaman Hortikultura”. Jurnal Lahan Suboptimal : Journal of Suboptimal Lands 4 (2):125-32. https://doi.org/10.36706/jlso.4.2.2015.158.