Production of CEA-grown Hydroponic Spinach - Publication by the Controlled Environment Agricultural (CEA) Program of the College of Agriculture and Life Sciences at Cornell University. An electronic handbook for the production of CEA hydroponic spinach. - http://www.cornellcea.com/Spinach_Handbook/sp_introduction.htm
Hydroponic Lettuce Production - Details of setting up and running a lettuce production facility using Controlled Environment Agriculture techniques. Illustrated with descriptive photos. Cornell University. - http://www.cornellcea.com/Lettuce_Handbook/introduction.htm
Role of Perlite in Hydroponic Culture - A research report issued by the Perlite Institute, Inc. by Dr. David A. Hall, Principal of the Pershore College of Horiculture in the United Kingdom - http://www.schundler.com/hydroculture.htm
Crop Physiology Laboratory - Hydroponics - Excellent source of information for recirculating hydroponics methodology from Utah State University. - http://www.usu.edu/cpl/research_hydroponics.htm
Hydroponics as a Hobby - A circular from the Extension at University of Illinois at Urbana-Champaign, offers a basic history and guide to hobby hydroponics. - http://www.ag.uiuc.edu/~vista/html_pubs/hydro/hydrotoc.html
Home Hydroponics - An excellent introduction to the hydroponic methodology from the Virginia Cooperative Extension. - http://www.ext.vt.edu/pubs/envirohort/426-084/426-084.html
How To Produce Green Fodder Hydroponically - Book on small scale cultivation of green fodder via the hydroponic method. Website in Spanish and English. - http://orbita.starmedia.com/~carlosarano
The Growing Edge - A bimonthly magazine dedicated to hydroponics, aquaponics, and greenhouse growing. Provides a wealth of free information for soilless growers. - http://www.growingedge.com
Growing Hydroponic Tomatoes - Interactive web site from the University of Arizona provides practical, accurate information on growing hydroponic tomatoes for students, hobbyists, and beginning growers. - http://www.ag.arizona.edu/hydroponictomatoes/
Institute for Simplified Hydroponics - Dedicated to supporting efforts to use simplified hydroponics to reduce global hunger and poverty. Offers classes and activities to support the education of simplified hydroponics, especially in developing nations. - http://www.carbon.org
Hydroponics Resource for Inexpensive Startups - Secrets for starting hydroponic businesses. Includes information about hydroponic nutrients, maintenance, production, greenhouses, and marketing. - http://www.mayhillpress.com