The spaces between soil particles are called "pore spaces" or "void spaces." These spaces are filled with air or water, depending on the moisture content of the soil. Pore spaces play a crucial role in determining the physical properties and behavior of the soil, such as its porosity, permeability, and water-holding capacity.
The size and arrangement of soil particles influence the amount and size distribution of pore spaces. Soils with larger particles, such as sand, tend to have larger pore spaces, while soils with smaller particles, such as clay, have smaller pore spaces. The arrangement of particles also affects the connectivity of the pores, which can impact the flow of water and air through the soil.
Pore spaces are essential for the movement of water, air, and nutrients in the soil. They provide pathways for roots to grow and for water to infiltrate and drain. The distribution and characteristics of pore spaces influence soil fertility, aeration, drainage, and the overall health of the soil ecosystem.