What method grows plants without soil in a nutrient solution, without associated fish farming?

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Hydroponics involves growing plants without agricultural soil, with their roots receiving water, oxygen and a controlled nutrient solution. They can be maintained in an inert substrate, such as rock wool or coconut fiber, or directly in the solution. This method makes it possible to control the supply of nutrients and recycle water in certain systems, but it requires energy, equipment and precise monitoring. Aquaponics also cultivates without soil: it combines plants with fish farming, the waste of which provides nutrients. The mention “without fish” therefore correctly distinguishes hydroponics.