Wahyuni, S., Purwanto, P., & Bako Baon, J. (2015). Runoff Water in Cocoa Plantation as Affected by Rorak Number and Mulch Type. Pelita Perkebunan (a Coffee and Cocoa Research Journal), 31(3), 196-207. https://doi.org/10.22302/iccri.jur.pelitaperkebunan.v31i3.206