This book explores the potential of diazotrophic plant growth-promoting microorganisms (DPGPMs) in supporting sustainable agriculture by naturally enhancing nitrogen availability for crops. It explains how plants interact with nitrogen-fixing microbes at genetic, biochemical, and physiological levels. The book also discusses the role of microbial consortia in enhancing soil and plant health, compares traditional fertilisers with integrated microbial approaches, and highlights the role of CRISPR in promoting nitrogen fixation. It includes case studies, such as maize cultivation, showing practical benefits. This book is a valuable resource for students, researchers, agricultural professionals, and anyone interested in sustainable farming practices. It offers practical insights and scientific understanding for those working in crop science, soil health, biotechnology, and environmental sustainability.

Dr. Rajesh Kumar Singh is currently the Principal Scientist and Head of Research & Development at Agromaxx Industry, India and Research Scientist at the Guangxi Academy of Agricultural Sciences, Nanning, China. He has previously worked as a Research Scientist focusing on sugarcane growth and soil fertility enhancement using diazotrophic bacteria. With over 15 years of experience in agricultural microbiology, he has led teams in developing biofertilizers and microbial solutions for crop productivity. He holds a master’s degree from Barkatullah University, Bhopal, Madhya Pradesh, India, and a Ph.D. from Rani Durgawati University, Jabalpur, Madhya Pradesh, India, followed by postdoctoral research in China. His interests include nitrogen fixation, plant-microbe interactions, and microbial stress management. He has received multiple awards for scientific excellence and has contributed extensively to research publications and book chapters.

Dr. Pratiksha Singh is an Assistant Professor at School of Agriculture Science, LNCT University, Bhopal, Madhya Pradesh, India. She has previously served as a Senior Researcher and Lecturer in Nanning, China. She earned her Ph.D. in Microbiology from Punjab Agricultural University, Ludhiana, Punjab, India, and completed two postdoctoral programs in China. She brings over 15 years of expertise in agriculture microbiology, with a strong research focus on diazotrophic plant growth–promoting microorganisms and their pivotal role in suppressing plant pathogens. She has published numerous high-quality research papers in this field. Her research focuses on biological nitrogen fixation, PGPR, endophytes, and molecular plant-microbe interactions. She has received several honours and has published widely in the field.