Raumjit, N., Siwadon, S., Sukanya, S. and Thirayut, W. (2019) “Comparison of root system and stomata in nine upland rice varieties ”, International Journal of Agricultural Technology, 15(5), pp. 769–778. available at: https://li04.tci-thaijo.org/index.php/IJAT/article/view/8301 (accessed: 17 November 2025).