“The Effect of Eco Enzyme from Pineapple (Ananas Comosus) Peel Waste on Soil PH, P Availability, Growth and Yield of Shallots (Allium Cepa) in Ultisols”. TERRA : Journal of Land Restoration 6, no. 2 (December 17, 2023): 51–56. Accessed June 26, 2025. https://ejournal.unib.ac.id/terrajournal/article/view/30244.