The aim of this study was to determine the interaction and main effects of coconut dregs and urea fertilizer on the growth and yield of mustard greens. This research was carried out at the Experimental Garden of the Faculty of Agriculture, Riau Islamic University, Jalan Kaharuddin Nasution Km 11, Air cold Village, Bukit Raya District, Pekanbaru City. This research was conducted for 2 months sta…