Chattanong Podong และ Saisunee Junta. (2020) Change in the Status of Secondary Macronutrient Levels in Soil with the Long-term Application of Chemical Fertilizers in Allium ascalonicum L. Plots in Lablare District, Uttaradit Province. <i>Naresuan University Journal: Science and Technology</i>, <i>28</i>(2), 94-110.Chattanong Podong และ Saisunee Junta. "Change in the Status of Secondary Macronutrient Levels in Soil with the Long-term Application of Chemical Fertilizers in Allium ascalonicum L. Plots in Lablare District, Uttaradit Province". Naresuan University Journal: Science and Technology 28 (2020):94-110.Chattanong Podong และ Saisunee Junta. Change in the Status of Secondary Macronutrient Levels in Soil with the Long-term Application of Chemical Fertilizers in Allium ascalonicum L. Plots in Lablare District, Uttaradit Province. Naresuan University Graduate School:ม.ป.ท. 2020.