For commercial growers, researchers, hobbyists, and students interested in hydroponics, Jones explains how this method of plant production works in a wide range of growing conditions. He begins with the concepts of how plants grow, then describes the requirements necessary for success with various hydroponic and soilless growing methods. His main focus is on nutritional requirements of plants, and how best to prepare and use nutrient solutions to satisfy these requirements in various growing systems and environmental conditions. The first edition was published in 1983 and revised in 1997. The disk contains full color illustrations of the hydroponic systems. Annotation ©2004 Book News, Inc., Portland, OR (booknews.com)