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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]
In North American English it is known as "romaine" lettuce, and in British English the names "cos" lettuce and "romaine" lettuce are both used. [2] Many dictionaries trace the word cos to the name of the Greek island of Cos, from which the lettuce was presumably introduced. [3] Other authorities trace cos to the Arabic word for lettuce, khus ...
Cutsumpas points out that, no matter how you choose to grow, the current lettuce shortage is a scary reminder that perhaps we shouldn't rely solely on our agricultural systems to keep us fed.
With proper management, a head of lettuce grown in ideal conditions in soil will grow as well as the same variety grown in a hydroponic system. [ 15 ] One advantage that DWC systems have over other forms of hydroponics is that plants may be re-spaced during the growth period, optimizing the growing area in regard to canopy cover and light-use.
To store romaine lettuce, put the unwashed head of lettuce in a plastic bag and stash it in a produce drawer. Find more tips and tricks to keep lettuce fresh .
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The water is released over the plant's roots and then runs back into the reservoir below in a constantly recirculating system. As with deep water culture, there is an airstone in the reservoir that pumps air into the water via a hose from outside the reservoir. The airstone helps add oxygen to the water.
The outbreak of E. coli killed five people and sickened at least 210 in 36 states, making it the largest outbreak of the infection in a decade.