This book entitled, Principles and Practices of Weed Management is written to serve a text book of Agronomy-cum-reference/guide book for the students of agriculture, veterinary, soil conservation and field practitioners. The books fills the needs for an up-to-date comprehensive text on weed science for sustainable agriculture under varying situations and covers comprehensive the content of the courses of weed biology, description of weeds, weed ecology and competition, aquatic weeds, methods of weed control, herbicide selectivity and formulations, absorption and translocation, herbicide application technology, classification and mode of action of herbicides, herbicide resistance, bio-herbicides, role of biotechnology, herbicide residues, weed control in field crops, orchards, forestry, non-cropped areas and parasitic weed control. Management of waste land, pasture land, organic farming, precision farming, and vermiculture bio-technology are also included. This book will be of immense use in imparting knowledge on the basic principles of weed Management and Practices on crop Production and applied aspects of integrated farming Systems for students, teachers, scientists, extension workers and professionals engaged in agricultural development.