Sustainable agriculture refers to a type of farming practice that addresses the needs of present and future generations, while ensuring profitability, environmental health, and social and economic equity. It incorporates a wide range of eco-friendly methods of farming that allow the production of crops or livestock without causing any damage to human or natural systems. Some of the common sustainable agriculture practices include multiple cropping, permaculture, mixed farming, agroforestry, crop rotation, and use of plant biostimulants. In agriculture, biostimulant refers to any substance or a mixture of substances having natural or microbial origin, which helps to improve the condition of crops. The use of biostimulants has shown to stimulate germination, seeding, plant growth, and crop productivity. This book provides comprehensive insights on sustainable agriculture and the application of microorganisms as biostimulants. A number of latest researches have been included to keep the readers updated with the global concepts in this area of study. Students, researchers, experts, and all interested in sustainable agriculture will benefit alike from this book.