Lepcha, N., and Suwanmaneepong, S. 2022. “Macronutrients (NPK) and other soil properties influenced by long term organic and conventional potato farming in West-Central Bhutan”. International Journal of Agricultural Technology 18 (3):1059-74. https://li04.tci-thaijo.org/index.php/IJAT/article/view/7292.