Sun, Tao, Yuyingnan Liu, Shuang Wu, Jizhou Zhang, Bin Qu, and Jinggang Xu. 2020. “Effects of Background Fertilization Followed by Co-Application of Two Kinds of Bacteria on Soil Nutrient Content and Rice Yield in Northeast China”. International Journal of Agricultural and Biological Engineering 13 (2). Beijing, China:154-62. https://ijabe.org/index.php/ijabe/article/view/4863.