Advanced Guide to Hydroponics NEW EDITION James Sholto Douglas Hydroponics is the science of growing plants Without using soil; the plant is established in some form of matrix (anything from gravel to plastic) and fed using nutrient solutions and water. This book studies the subject in detail. It is a companion volume to James Sholto Douglas' earlier Beginner's Guide to Hydroponics. The design and construction of many different types of hydroponic units are dealt with in detail. The practical operation and control of the cultures are also explained. Many types of nutrient solutions are examined, the various formulae being analysed in great detail. In addition, alternative mixtures for organic cropping are discussed. The practical management of hydroponics and the economics of establishing and running units are also discussed
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