Usually, polypropylene foam boards are used, with holes drilled at certain distances, and crops are cultivated in the holes. Two foam boards are placed diagonally into a triangle to form a space. The liquid supply pipe passes through the triangular space and sprays on the hanging roots. Generally, spray for a few seconds every 2-3 minutes to recycle the nutrient solution and ensure sufficient oxygen for the crop roots.

Tomatoes grown without soil can mature 7 to 10 days earlier, and the yield can be increased by 0.5 to 1.0 times. The national average in the United States is 9,000 to 10,000 kilograms of tomatoes per crop, 9,000 to 15,000 kilograms of cucumbers, and 2,000 to 3,000 kilograms of lettuce per acre. The tomato output per mu is 26 tons/year in the UK, 26-30 tons/year in the Netherlands, and 21-25 tons/year in Japan.
Able to produce clean, hygienic and pollution-free products

In protected land cultivation, due to limitations of facility conditions, in order to strive for multiple crops and high benefits, frequent continuous cropping of soil has resulted in serious soil-borne diseases and insect pests, continuous accumulation of soil salt, soil acidification, soil salinization, soil compaction and other continuous cropping obstacles. Soilless cultivation does not require land for planting, which can avoid the occurrence of soil continuous cropping obstacles.

Even though there are no obvious bottlenecks in soilless cultivation technology, soilless cultivation still relies heavily on production costs. The input of nutrient solutions and substrates is much higher than the input of soil fertilizers. Therefore, soilless cultivation is basically only used for high-quality crops such as blueberries and strawberries. On the planting of crops with economic returns and crops in special environments. Due to cost constraints, it is currently impossible for soilless cultivation to completely replace soil cultivation.
Even though the technology is mature, there have been no more major breakthroughs and achievements in the field of soilless cultivation at home and abroad in recent years. In terms of technology application, there is still a gap between my country and many developed countries. In practical applications, my country's soilless cultivation should use more convenient, low-cost, and effective technologies and supporting facilities, truly apply scientific research to actual agricultural production, and realize the upgrade of agricultural models.