We are used to thinking of the soil as an inert solid material, devoid of life, made up of mineral particles of different sizes (gravel, sand, silt, clay) and a small part of organic material. In reality, thanks to the air and water that circulate in the empty spaces (pores) present among the different particles, and thanks to the substances present in it, the soil represents a favorable environment for the development of life. Bacteria, fungi, plants and animals (invertebrates and small vertebrates) find in the soil everything they need to survive and reproduce, interacting with each other and with the soil in the continuous and cyclical transformation of inorganic matter into organic matter and vice versa.
