Dr. Kala Devi Ramahsamy. (2012). Oil Palm Waste - Sewage Sludge Compost As A Peat Substitute In A Soilless Potting Media for Chrysanthemum. Global Journal of Science Frontier Research, 12(D2), 35–44. Retrieved from https://journalofscience.org/index.php/GJSFR/article/view/487