Wongkaew, A., Saito, H., Chueasamat, A., Aramrak, S., Nakasathien, S., and Sreewongchai, T. 2026. “Small-scale spatial variability of selected soil properties in a sloped cultivation area  A case study of Phetchabun province’s highland region, Thailand”. International Journal of Agricultural Technology 22 (2):1017-44. https://doi.org/10.63369/ijat.2026.22.2.1017-1044.