Noersidiq, Azhary, Yetti Marlida, Mardiati Zain, Anwar Kasim, Fauzia Agustin, and Nurul Huda. 2020. “The Effect of Urea Levels on In-Vitro Digestibility and Rumen Fermentation Characteristic of Ammoniated Oil Palm Trunk”. International Journal on Advanced Science, Engineering and Information Technology 10 (3):1258-62. https://doi.org/10.18517/ijaseit.10.3.11574.