1. Open or closed hydroponics systems with growing substrates and periodic irrigation:
    In the open hydroponics systems, the runoff of the nutrient solution is rejected (waste of water and nutrients facing environmental problems – eutrophication)
    In the closed hydroponics systems, by recycling the nutrient solution (saving water and nutrients 40% compared to open systems) the environmental problems are limited.
  2. Hydroponics systems in water:
    Water Floating Systems
    NFT (Nutrient Film Technique) Systems
    NFT (Deep Flow Technique) Systems
    Ebb and Flow systems
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