In fact, the water that is absorbed from the soil into the plant's body, the water needed to supply plant life and photosynthesis to produce organic matter is only a small part, and most of it becomes water vapor, which evaporates into the air through the pores on the leaves.
Research shows that 60% to 80% of field water capacity in orchard soil is most suitable. The intuitive criterion is that the 20 cm deep soil is hand-knotted and grounded. Maintaining such humidity requires no irrigation. The reason why grass orchards or covered orchards can reduce the number of waterings is because the surface vegetation has long maintained this suitable humidity.
Water and air are two important factors for the development of the root system, but there is a pair of contradictions between them. Water is more, occupying the pores of the soil and the air is reduced. The soil is dry, there is less water in the soil, and there is more air. Therefore, watering an orchard should not only consider the water supply, but it should also be considered to keep the soil at a certain oxygen content.
Considering the role of water in fruit trees and the relationship between water and air in the soil, it can be said with certainty that a lot of irrigation is a violation of science. Flood irrigation in the garden is harmful and wastes water resources. From this point of view, many experts have advocated the establishment of fertilizing watering belts. It is scientific to interpolate only a part of each time or to intercrop water every growing season.
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