Sri Mahareni Br Sitepu, & Refnizuida. (2023). Effectiveness of NPK Fermentation From Various Types of Plant Waste on the Growth and Production of Several Red Onion Varieties . The International Conference on Education, Social Sciences and Technology (ICESST), 2(1), 87–93. https://doi.org/10.55606/icesst.v2i1.273