Benton Jones defines hydroponics as “a technique in which plant roots are suspended in either a static, continuously aerated nutrient solution or in a continuous flow or mist of nutrient solution” (Barton Jones, 2014).
There are five main kinds of hydroponics systems. Two of these do not use a growing medium and are considered to be true hydroponics, while the other three do and are considered to be methods of “soilless culture” (Barton Jones, 2014).
Medium-less:
Nutrient Film Technology (NFT)
Rooting Medium:
Flood-and-Drain Nutrient Solution System
Works Cited:
Benton Jones, Jr., J. (2014). Complete Guide for Growing Plants Hydroponically. CRC Press LLC.