External links

Controlled Environment Agriculture Center, University of Arizona
Barak, P. 2002. Essential Elements for Plant Growth: Hydroponics.
Hershey, D.R. 1994. Solution culture hydroponics: history and inexpensive equipment. American Biology Teacher 56:111-118.
Jensen, M.H. 1997. Hydroponics. HortScience 32
Hydroponics as a Hobby: Growing Plants Without Soil. University of Illinois, Circular 844
Utah State University Hydroponics
Hydroponics at McMurdo Station Antarctica
Cornell University Commercial Hydroponic Lettuce, Spinach and Pak Choi Grower's Handbooks
Hydroponics and Soilless Cultures on Artificial Substrates as an Alternative to Methyl Bromide Soil Fumigation
Robotically tended hydroponic crops, (Popsci).
Hydroponic Lesson Plans
Hydroponic Gardening: A Resource Guide for Understanding, Teaching, or Writing about Hydroponic Gardening (from the Progressive Gardening Trade Association)
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