Hydroponics system-Nutrient Film Technique (NFT) NFT provides no medium support for roots. Typically, roots sit in a long sloping irrigation channel (Fig 1.1). Nutrient is introduced at the high end of the channel & allowed to flow over the roots after which it drains into a nutrient reservoir. It is then re-pumped back into the channel to repeat the watering process. This feed cycle can be intermittent or continuous. An