Aquaponics is a system of aquaculture which allows farmers to raise fish while also being able to grow plants. The waste produced by the farmed fish or other aquatic creatures supplies nutrients for the plants.
In aquaponics, we grow fish and plants together in a tank. The tank has fish in it and on the sides of the tank there are beds for plants. The water from the fish tank which is rich in nutrients due to the fish waste goes into the plants. The yield from an aquaponic farm is thus two times higher. The only limitation of this farming technique is that one cannot grow underground fruits and vegetables.
Image Credit: Aquaponic greenhouse of the Green Age NGO in Apaga, Armavir marz, Armenia, Image Credit: Narek75, CC BY-SA 4.0 https://creativecommons.org/licenses/by-sa/4.0, via Wikimedia Commons