This study aims to determine the interaction and main effect of quail manure and Grand-K on the growth and production of mustard (Brassica juncea L.). This research was carried out in the experimental garden of the Faculty of Agriculture, Riau Islamic University, Jalan Kaharuddin Nasution No. 113, KM 11 Marpoyan, Air Cold Village, Bukit Raya District, Pekanbaru City. The study was carried out f…