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  2. Hydroponics - Wikipedia

    en.wikipedia.org/wiki/Hydroponics

    Whenever the solution is depleted below a certain level, either water or fresh nutrient solution is added. A Mariotte's bottle, or a float valve, can be used to automatically maintain the solution level. In raft solution culture, plants are placed in a sheet of buoyant plastic that is floated on the surface of the nutrient solution.

  3. Deep water culture - Wikipedia

    en.wikipedia.org/wiki/Deep_water_culture

    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 ...

  4. Tree shelter - Wikipedia

    en.wikipedia.org/wiki/Tree_shelter

    Young trees sheltered by plastic tubes. A tree shelter, tree guard or tree tube (sometimes also Tuley tube) is a structure used in tree planting, arboriculture and tree care that protects planted tree saplings from browsing animals and other dangers as the trees grow.

  5. Ballcock - Wikipedia

    en.wikipedia.org/wiki/Ballcock

    The valve is connected to the incoming water supply, and is opened and closed by the lever which has the float mounted on the end. When the water level rises, the float rises with it; once it rises to a pre-set level, the mechanism forces the lever to close the valve and shut off the water flow.

  6. Plasticulture - Wikipedia

    en.wikipedia.org/wiki/Plasticulture

    Plant height in okra was significantly increased with black plastic mulch use compared to those grown in bare soil. Evaporation from soil accounts for 25-50% of water used in irrigation , using plastic mulch prevents much of this evaporation and thus reduces the amount of water needed to grow the crop. [ 8 ]

  7. List of valves - Wikipedia

    en.wikipedia.org/wiki/List_of_valves

    Choke valve, Butterfly valve used to limit air intake in internal combustion engine. (Not to be confused with choke valves used in industrial flow control, above.) Clapper valve: a type of check valve used in the Siamese fire appliance to allow only one hose to be connected instead of two (the clapper valve blocks the other side from leaking out)

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  9. Level control valve - Wikipedia

    en.wikipedia.org/wiki/Level_control_valve

    A level control valve or altitude control valve is a type of valve that automatically responds to changes in the height of a liquid in some storage system. A common example is the set of ballcocks in a flush toilet , where each stage of the flush cycle is actuated by the emptying or filling of the tank.

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