Heman, Liu, Cao Lihua, Xu Changchang, Yang Hong, and Li Baoguo. “Distribution Characteristics of Soil Organic Carbon and Nitrogen in Farmland and Adjacent Natural Grassland in Tibet”. International Journal of Agricultural and Biological Engineering 9, no. 1 (January 31, 2016): 135–145. Accessed December 26, 2025. https://ijabe.migration.pkpps03.publicknowledgeproject.org/index.php/ijabe/article/view/2220.