The purpose of this study was to determine the interaction and main effect of the application of gandasil-D and solid (sludge) on the growth and production of mustard pakcoy. This study used a factorial Completely Randomized Design (CRD) consisting of two factors. The first factor was gandasil-D fertilizer consisting of 4 levels, namely concentrations of 0, 2, 4, and 6 g/liter of water. While t…