Rusman, Bujang, Agustian Agustian, Aprisal Aprisal, and Syafrimen Yasin. 2018. “Andisols Water Retention Under Peasant Oil Palm Plantation”. International Journal on Advanced Science, Engineering and Information Technology 8 (1):280-84. https://doi.org/10.18517/ijaseit.8.1.3446.