Podong, Chattanong, AND 		Junta, Saisunee.
" 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" <em>Naresuan University Journal: Science and Technology (NUJST)</em> [Online], Volume 28 Number 2 (27 April 2020)