ละเอียด ชลวุฒิ. “Soil Fertility Conservation for Sustainable Field Maize Production”. Thai Agricultural Research Journal 22, no. 3 (September 2, 2019): 230–239. Accessed May 15, 2024. https://li01.tci-thaijo.org/index.php/thaiagriculturalresearch/article/view/213739.