Dr Dave Watson is a leading authority on sustainable development and optimising value chains in agriculture. He has taught courses on sustainable development for the University of Hull (UK), as well as managing research and development programmes for the International Livestock Research Institute (ILRI), the International Institute of Tropical Agriculture (IITA) and the International Maize and Wheat Improvement Center (CIMMYT) in Mexico. Dr Watson is editor of the two-volume Achieving sustainable cultivation of maize, also published by Burleigh Dodds Science Publishing. Professor Glen Fox is the Anheuser-Busch Endowed Professor of Malting and Brewing Science at the University of California, USA. Previously, he was a Senior Fellow at the University of Queensland, Australia. He has many years experience working with barley breeding programmes, and malting and brewing industries in Australia and overseas. With these companies, his worked focused on the influence of barley quality on malting and brewing quality. He is a Fellow of the Institute of Brewing and Distilling. Professor Fox has over 250 book chapters, journal articles and conference presentations. He has also supervised over 50 post-graduates students mostly in the area of barley and malt quality. His current research interests include digger deeper into barley, malt, wort composition on beer quality.