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Article: Hydroponics.
- Article from:
- Science Weekly
- Article date:
- November 15, 2006
CopyrightCOPYRIGHT 2006 Science Weekly, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Hydroponics
If you've brushed against seaweed in the ocean, or seen fish nibbling on plants in an aquarium, then you know that plants can grow without soil. The technology of growing plants without soil is called hydroponics (hy-dro-pon-ics).
Hydroponic plants may be grown indoors or outdoors in water, gravel or sand. They can also be grown in sawdust (saw-dust), vermiculite (ver-mic-u-lite), which is a man-made growing material, or other soilless (soil-less) materials. Plants grown hydroponically need light, water, and oxygen, like all plants. The difference is that hydroponically grown plants get nutrients (nu-tri-ents) from a specially formulated ...