What is soil moisture?
Moisture refers to the humidity of the soil suitable for the growth and development of plants. Moisture refers to the condition of soil moisture. Soil moisture is the degree of soil dryness and wetness, that is, the actual soil moisture content, which can be expressed as the percentage of soil moisture content in the dry soil weight: soil moisture content = moisture weight / dry soil weight x 100%. It can also be expressed in terms of relative water content such as the percentage of soil water content equivalent to field water holding capacity, or the percentage relative to saturated water content. The existence form of soil moisture actually refers to the existence form of soil water. Soil water exists in soil pores, especially small and medium pores, and large pores are often occupied by air. Plant roots interspersed in the pores of the soil absorb water from the pores of the water-bearing soil. There is a humidity gradient at the water-air interface in the soil, and the tempera...