Anandyawati, ., Enok Sumarsih, Budi Nugroho, and Rahayu Widyastuti. 2017. “Study of Root Exudate Organic Acids and Microbial Population in the Rhizosphere of Oil Palm Seedling”. JOURNAL OF TROPICAL SOILS 22 (1):29-36. https://doi.org/10.5400/jts.2017.v22i1.29-36.