After only three years of experimentation with the Keyline system, Yeomans self-published this, his first of several books. It is an eye-opening look at how to help land retain all the rainfall it receives, opening the whole soil body to root penetration and releasing the natural fertility of the land. As a mining engineer and gold assayer, Yeomans had developed a keen sense of hydrology and equipment design. Upon his brother-in-law's death in a grass fire, Yeomans assumed management of a large tract of land he later named Nevallan in New South Wales. There he developed improved methods and equipment for cultivation. His designs won him The Prince Philip Design Award Australia in 1974. His Keyline principles or concepts (Keyline Design) have been adopted by farm owners in almost every country in the world. Yeomans' Keyline concepts are now part of the curriculum of many sustainable agriculture courses in colleges and universities across the world. Illustrated with diagrams and black and white and colour photographs.