The research aimed to study the effect of the interaction granting Trichokompos oil palm empty fruit bunches (PEFB) formulated and potash fertilizers, a major influence both on the growth and yield and K nutrient uptake by plants of shallot (Allium ascalonicum L.) in peatlands. Research conducted experiments in the form of 4 x 3 factorial prepared using completely randomized design (CRD). Trich…