How To Use Progressive Web App aka PWA On 420 Magazine Forum
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The system of Nutrient Film Technique (NFT) was originally designed and developed by Dr Allen Cooper. The concept is described by Dr Cooper as follows: " A very shallow stream of water containing all the dissolved nutrients required for growth is recirculated past the bare roots of crop plants in a water tight gully.....Ideally, the depth of the recirculating stream should be very shallow, little more than a film of water - hence the name nutrient film. This ensures that the thick root mat, which develops in the bottom of the gully, has an upper surface which, although moist, is in the air. Consequently, there is an abundant supply of oxygen to the roots of the plants.