Wahyuni, Sri, Purwanto Purwanto, and John Bako Baon. “Runoff Water in Cocoa Plantation As Affected by Rorak Number and Mulch Type”. Pelita Perkebunan (a Coffee and Cocoa Research Journal) 31, no. 3 (December 31, 2015): 196-207. Accessed September 26, 2022. https://ccrjournal.com/index.php/ccrj/article/view/206.