Deng, Fei, Xiaobing Li, Hong Wang, Meng Zhang, Ruihua Li, and Xu Li. “GIS-Based Assessment of Land Suitability for Alfalfa Cultivation: A Case Study in the Dry Continental Steppes of Northern China”. Spanish Journal of Agricultural Research 12, no. 2 (March 24, 2014): 364-375. Accessed May 3, 2024. https://sjar.revistas.csic.es/index.php/sjar/article/view/4672.