Dr. Tuo Yao works at Pratacultural College, Gansu Agricultural University. He earned his Ph.D. in Grassland Science from Gansu Agricultural University in 2002, and conducted collaborative research on plant growth-promoting rhizobacteria (PGPR) at the National Institute for Biotechnology and Genetic Engineering (NIBGE). He participated in scientific exchanges on biological nitrogen fixation and bio-fertilizers in Malaysia and Thailand. He was a visiting scholar at Laval University, Canada, advancing his research on PGPR development and applications. Form now, he has published many articles in top international journals, such as Food Chemistry, Journal of Plant Growth Regulation, Journal of Hazardous Materials, Soil & Tillage Research, Bioresource Technology, Biological Control, Science of the Total Environment, Environmental and Experimental Botany, Waste Management, Environmental Research, and Journal of Agricultural and Food Chemistry. His research interests mainly include research and development of agricultural applied microorganisms and their preparations (microbial fertilizers and pesticides), resource utilization of agricultural wastes (fertilizer and materials), ecological function and application of plant growth promoting rhizobacteria (PGPR), and restoration technology of degraded grassland in alpine and arid areas. He won the second prize of Science and Technology Progress of Gansu Province three times.