Syafria H, Jamarun N, Pazla R. Utilization of Biourine and Arbuscular Mycorrhizal Fungi as Biotechnological Agents for Improving Land Productivity of Ex-Coal Mines and Testing Their Effects on the Content of Forage Fiber Fractions [Hymenachne amplexicaulis (Rudge) Nees]. Pak. J. Nutr. 2019;18(8):791–794. doi:10.3923/pjn.2019.791.794