“Physiological Responses of Bio-Silica-Treated Oil Palm Seedlings to Drought Stress (Tanggap Fisiologi Bibit Kelapa Sawit Yang Diberi Bio-Silika Terhadap Cekaman Kekeringan)”. 2019. Menara Perkebunan 87 (1). https://doi.org/10.22302/iribb.jur.mp.v87i1.306.