Basyaruddin, Basyaruddin. 2017. “Application of Sludge and Manure on Subsoils As Medium of Palm Oil Seedling (Elaeis Guineensis Jacq)”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 32 (2):95-104. https://www.gssrr.org/index.php/JournalOfBasicAndApplied/article/view/6957.