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Plants placed into nutrient-rich water channels in an NFT system A home-built NFT hydroponic system. Nutrient film technique (NFT) is a hydroponic technique where in a very shallow stream of water containing all the dissolved nutrients required for plant growth is re-circulated past the bare roots of plants in a watertight gully, also known as channels.
The Kratky method is a passive hydroponic technique for growing plants suspended above a reservoir of nutrient-rich water. [1] Because it is a non-circulating technique, no additional inputs of water or nutrients are needed after the original application, and no electricity, pumps, or water and oxygen circulation systems are required. [2]
Deep water culture (DWC) is a hydroponic method of plant production by means of suspending the plant roots in a solution of nutrient-rich, oxygenated water. Also known as deep flow technique (DFT), floating raft technology (FRT), or raceway, this method uses a rectangular tank less than one foot deep filled with a nutrient-rich solution with ...
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Aquaponics is a food production system that couples aquaculture (raising aquatic animals such as fish, crayfish, snails or prawns in tanks) with hydroponics (cultivating plants in water) whereby the nutrient-rich aquaculture water is fed to hydroponically grown plants.
Also, in hydroponic systems, water and nutrients are recirculated in a controlled environment, eliminating runoff and the discharge of pollutants into local waterways. [59] By using hydroponics to grow crops indoors or in greenhouses, land use is minimized, reserving arable soil and land for other purposes.
Production takes place within an enclosed growing structure such as a mushroom farm, greenhouse or plant factory. [2] CEA covers two sectors: plant growing systems that evolved from greenhouses or aquaculture based structures requiring light [3] and mushroom (fungi) growing systems that evolved from fully enclosed structures with limited ...
Underground farming is usually done using hydroponics, aeroponics or air-dynaponics systems or container gardens. Light is generally provided by means of growth lamps [1] or daylighting systems (as light tubes). [2] The advantages of underground farming are that it is independent of the environment above the ground.
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