Ernitha Panjaitan 2023. Effect Of Chicken Manure And Volcanic Ash On The Growth And Production Of Shallot (Allium ascalonicum L.) And P Availability In Paddy Field. International Journal of Economics, Business and Innovation Research. 2, 05 (Aug. 2023), 79-95. DOI:https://doi.org/10.63922/ijebir.v2i05.168.