Sri Mahareni Br Sitepu, and 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.