Since plants not only provide food for man and his domestic animals but also pharmaceutical products and raw materials for industry, the development of new crops is of great importance. However, many plant species remain unexploited or are only utilized at a local level. This book provides information on the current research into the use of such crops and on their development in a commercial setting. Written by scientists from many different countries, it covers a wide variety of both temperate and tropical crops, their cultivation, marketing and development, and the socio-economic and environmental factors influencing their utilization.