Book excerpt: Unknown to most people, there are innumerable microbial species that accomplish vital ecosystem functions while residing in a suspended state in the troposphere or resting on crop canopies. These microbial species, if utilized properly, can improve agriculture. At the same time, harmful microbes can also devastate crops easily. This new book, Microbiology of the Agricultural Sky, explores a number of microbes present in the agrarian sky and details their identities, roles in nature, and usefulness to crops as well as other biotic factors. The volume first provides an introduction that details the historical aspects of microbes relating to their discovery and identification of their role in agrarian ecosystems. The book then gives detailed explanations of microbes in the atmosphere, with information on the general distribution, spread distance, and intercontinental migration of microbes in the atmosphere. It discusses aeolian dust microbes above agrarian regions and the role of aerial microbes in nutrient dynamics. The book also explains the functions of microbes that reside on crop canopies and the importance of the plant‘s phyllosphere. It looks at microbial flora and how a region‘s bio-geochemical functions affect crops. Also discussed is the role of aerial microbes in inducing epidemics and pandemics among different crops. The final chapter details farm procedures that can be adopted in the outfield and in animal houses and how they impact atmospheric microbes. Key features: Highlights the relevance of the agrarian sky and its microbial component, detailing the wide range of functions that microbes accomplish in the aerospace Presents a timeline of discoveries about aeromicrobiology and the agrarian sky Discusses aerial microbes on crop canopies and their influence on plant pathogens, including beneficial nutrients, need for crop protection, etc. Looks at the microbiology of the agrarian sky and the spread of crop diseases locally and via the intercontinental migration of microbes Discusses farm procedures and their impact on microbes in the troposphere and the agricultural fields beneath it This first-of-its-kind book provides extensive information on microorganisms that can be traced in the agrarian sky and their relevance to agriculture. The easy-to-read style of the book makes it suitable for farmers, agricultural science professors, students, and researchers. It will be useful for farm specialists dealing with airborne diseases, GHG emissions, and agronomic procedures as well.