A hydroponic technique in which nutrients are added to a stream of water which is pumped into a sloped channel in which the plant’s roots hang. While the bottom of the roots will be immersed in the nutrient flow, the top of the roots should remain suspended in the air. The most important factors in this type of system are the angle of the slope of the channel, the pace of the water flow, the concentration of nutrients, and the length of the channel. This system generally works best for plants that are light (don’t need a lot of support) and grow quickly.
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