Supamard Panichsakpatana. “Efficiency of Some Selected Organic Wastes as Nitrogen Source for Sweet Corn Grown on Kamphaeng Saen Soil”. Agriculture and Natural Resources 29, no. 3 (September 30, 1995): 358–370. accessed September 17, 2026. https://li01.tci-thaijo.org/index.php/anres/article/view/241337.