Prastowo, E., Hikmah, N., & Baon, J. (2015). Ammonia Volatilization in Cocoa Farm as Affected by Sugarcane Filter Cake Supply at Different Urea and Soil Moisture Levels. Pelita Perkebunan (a Coffee and Cocoa Research Journal), 30(3), 208-219. https://doi.org/10.22302/iccri.jur.pelitaperkebunan.v30i3.63