The DRFT demonstrates that hydroponics systems can be customized because it is a hybrid of several hydroponics techniques as shown in the figure above. Similar to the NFT, this system pumps the nutrient solution from a reservoir to a container that supports the plants. In this system, the roots are fully submerged in the nutrient solution. The pump turns off when the nutrient solution reaches a certain depth. Then, the nutrient solution circulates back to the reservoir through the overflow pipe or drain to be reused. The lower sections of the roots dangle in the nutrient solution and specialize in nutrient uptake (nutriroots) whilst the upper part is not submerged in the solution and is responsible for oxygen intake (aeroroots) DRFT keeps the temperature constant and so is desirable for tropical and semi-tropical regions of Asia. Since oxygen is less soluble in warm water, the DRFT is well-suited for hydroponic farming in tropical and subtropical climates such as those found in Thailand.
This system is suitable for Thai vegetables.
Advantage: Constant temperature and the product will survive through the black out.
Disadvantage: Needs a lot of nutrient and water
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