Reference Terms
from Wikipedia, the free encyclopedia

Hydroponics

Hydroponics is the growing of plants without soil.

Researchers of plant metabolism have discovered that plants absorb nutrients as simple ions in water.

In natural conditions, soil acts as a nutrient reservoir but the soil itself is not essential to plant growth.

Note:   The above text is excerpted from the Wikipedia article "Hydroponics", which has been released under the GNU Free Documentation License.
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August 4, 2015

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