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Article: Hydroponics
- Article from:
- Plant Sciences
- Author:
CopyrightCOPYRIGHT 2001 The Gale Group 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
Hydroponics is the practice of growing plants without soil. Plants may be suspended in water or grown in a variety of solid,
inert
media, including vermiculite (a mineral), sand, and rock wool (fiberglass insulation). In these cases, water that permeates the medium provides the nutrients, while the medium provides support for root structures. Hydroponics allows precise control of nutrient levels and oxygenation of the roots. Many plants grow faster in hydroponic media than in soil, in part because less root growth is needed to find nutrients. However, the precise conditions for each plant differ, and the entire set up must be in a ...
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