This unique book provides a comprehensive, up-to-date collection of information on the genetic factors, agronomic production methods, and environmental factors that impact the content of vitamins in plants. The effect of various biotic and abiotic stress factors is discussed, and the possible role of some vitamins in plant tolerance to stress factors is also investigated. The book features eye-opening data on vast vitamin variations among farmer-cultivated plants, as well as an extensive comparison between foods grown organically and those grown by conventional methods. With increasing evidence supporting the role of some vitamins in reducing risks of various forms of human cancer, this book provides timely information for researchers, teachers, and students in agronomy, horticulture, plant physiology, food sciences, and human nutrition.