The aims of the project were to raise the yield of quality walnuts from 1.5 to 4t ha-1, decrease the time to reach commercial yields from 10 to 4 years and facilitate the expansion of the walnut industry. These objectives were met by a new management system for walnuts using soil modification, improved irrigation technology, close spacing of trees and the best cultivar available. An opportunity for commercial production of walnut timber was also tested.