This video is about the water-retaining polymer material - potassium polyacrylate.
In the video, we simulated the infiltration process of irrigation water in the soil. The water-retaining agent is used on the left, and the control group is on the right.
When the water flows to the second layer of the props, it means it can be absorbed by plants. When left to the third layer, it means that it cannot be absorbed by plants.