Rahhutami, Ratih, and Sudradjat, Sudirman Yahya. “Optimization and Effect of N , P, and K Single Fertilizer Package Rate on Two Years Old Immature Oil Palm (<i>Elaeis guineensis</I> Jacq.)”. Asian Journal of Applied Sciences 3, no. 3 (June 15, 2015). Accessed May 8, 2024. https://ajouronline.com/index.php/AJAS/article/view/2670.