Hydroponics

In a hydroponic system, plants are submerged in a nutrient solution, where water is the growing medium and nutrients and vitamins needed for optimal growth are added. There are many advantages attached to the use of hydroponics such as; it is a soilless method; it ensures stock stability; high yields; no co2 emissions are released into the environment; higher nutrient and water use efficiency due to full controllability. There are two approaches that can be used within the hydroponic system. The first is the use of a substrate, such as rockwool, perlite, coco, clay pebbles and peat. The second approach is the cultivation of plants where substrates are not needed. Nutrient film technique or NFT accommodates for the use without substrates. NFT was developed in the mid 1960s in England. A technique where a very shallow stream of water containing all dissolved nutrients, required for plant growth is re-circulated past the bare roots of plants in a watertight gully, also known as channels.