Zhangliu, Du, Liu Shufu, Xiao Xiaoping, Yang Guangli, and Ren Tusheng. “Soil Physical Quality As Influenced by Long-Term Fertilizer Management under an Intensive Cropping System”. International Journal of Agricultural and Biological Engineering 2, no. 1 (March 25, 2009): 19–27. Accessed January 27, 2026. https://ijabe.org/index.php/ijabe/article/view/56.