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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 ...
Besides use in fields/containers outdoors, it can also be used indoors (i.e. greenhouse). The system is designed to increase food production while using approximately 50% less water than traditional irrigation by utilizing underground water reservoirs filled with decomposing organic matter and the process of evaporation .
Gericke had been denied use of the university's greenhouses for his experiments due to the administration's skepticism, and when the university tried to compel him to release his preliminary nutrient recipes developed at home, he requested greenhouse space and time to improve them using appropriate research facilities.
Wick basin solar still. The wick type solar still is a vapour-tight glass-topped box with an angled roof. [7] Water is poured in from the top. It is heated by sunlight and evaporates. It condenses on the underside of the glass and runs into the connecting pipe at the bottom. Wicks separate the water into banks to increase surface area.
Phyllanthus fluitans, also known as the red root floater, floating spurge, [3] [4] or apple duckweed (although it is neither a spurge or a duckweed), is a species of free floating aquatic plant and herbaceous perennial [5] in the family Phyllanthaceae. [6]
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[10] [11] One scholar has calculated the size of chinampas using Codex Vergara as a source, finding that they usually measured roughly 30 m × 2.5 m (100 ft × 10 ft). [12] In Tenochtitlan , the chinampas ranged from 90 m × 5 m (300 ft × 20 ft) [ 12 ] to 90 m × 10 m (300 ft × 30 ft) [ 12 ] [ 13 ] They were created by staking out the shallow ...