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Category - Hydroponics & Fertigation
Hydroponics is defined as growing plants, using mineral nutrient solutions, without soil.
Although hydroponic systems do not involve soil, they may involve a wide variety of growing media, such as perlite, gravel, peat, sand, rockwool and others.
In hydroponic systems, most of the plant nutrients are supplied by the nutrient solution, rather than by the media in which the plants are grown.
While soil allows more tolerance for inaccuracy, hydroponics leaves very little room for errors. Because changes are rapid and mistakes can be very costly, hydroponics growers should make highly educated and accurate decisions.
Types of Hydroponic Systems
There are two main types of hydroponic systems - closed hydroponic systems and open hydroponic systems. Hydroponic systems that do not involve growing media are usually closed systems, while hydroponic systems that involve growing media (container plants), may be closed or open systems.
Closed Hydroponic Systems
In closed hydroponic systems the same nutrient solution is recirculated and the nutrient concentrations are monitored and adjusted accordingly.
Deep Water Culture (DWC) hydroponic systems - This is the most simple type hydroponic systems. In this type of hydroponic systems plants are suspended in an oxygen-enriched nutrient solution.
The Wick hydroponic systems - This is a passive hydroponic system, in which wicks run from the base of the plant container down to a reservoir and draw the nutrient solution upwards.
Open Hydroponic Systems
In open hydroponic systems a fresh nutrient solution is introduced for each irrigation cycle. The nutrient solution is usually delivered to the plants using a drip system. In open hydroponic systems an adequate run-off must be maintained in order to keep nutrient balance in the root zone.
An open hydroponic system
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