Final answer:
The Nutrient Film Technique is a hydroponic system where nutrient-rich water flows over plant roots suspended in channels, allowing for efficient absorption of nutrients and water.
Step-by-step explanation:
A type of hydroponic system is called the Nutrient Film Technique (NFT). This system works by flowing a thin layer of nutrient-rich water over the roots of plants, which are suspended in channels. The plants absorb nutrients and water as the solution passes by. The system is designed to use water efficiently and allows for precise control of nutrient levels, providing optimal conditions for plant growth. In NFT systems, plants are often placed in net pots or grow cups, where the roots hang down into the channel, and the upper part of the plant is supported above.
Because there is no soil involved, growers can avoid soil-borne diseases and pests. Additionally, hydroponic systems like NFT can be set up indoors, allowing for year-round cultivation regardless of outdoor weather conditions. It's common to see vegetables like lettuce and tomatoes grown using hydroponics in commercial greenhouses or even home setups. This approach also allows scientists to study plant growth under controlled nutrients and environmental conditions.