Pradana, Andy, and Al Machfudz WDP. “Application of Potassium Fertilizer and Chicken Coop Fertilizer Against Growth and Production of Shallots (Allium Ascalanicum L.)”. Nabatia 9, no. 1 (June 15, 2021). Accessed May 21, 2024. https://nabatia.umsida.ac.id/index.php/nabatia/article/view/1454.