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Pergamon www.elsevier.com / locate / solener PII: Solar Energy Vol. 66, No. 4, pp. 277–289, 1999 © 1999 Elsevier Science Ltd S 0 0 3 8 – 0 9 2 X ( 9 9 ) 0 0 0 2 8 –…

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Hydroponics Hydroponics the cultivation of plants without soil ." Commercial Hydroponics Systems Homemade Hydroponics Systems Hydroponics Growing Mediums Clay Pellets…