Akpanurom, K. S., Uduak, I. G., & Etukudo, N. N. (2023). Effects of NPK fertilizer on soil properties and prema onion (Allium cepa L.) performance in a humid environment at Obio-Akpa, Akwa Ibom State. Journal Of Agriculture, Forestry & Environment , 7(1), 116-128. https://jafe.net.ng/index.php/home/article/view/126