Buajan, Supaporn, Liu JinFu, He ZhongSheng, and Abrar Muhammad. 2017. “Effect of Gap Size on Seasonal Variation of Soil Chemical Properties in Subtropical Forest, Southern China”. Environment and Natural Resources Journal 15 (2). Nakhon Pathom, Thailand:39-50. https://ph02.tci-thaijo.org/index.php/ennrj/article/view/89354.