oil structure affects water and air movement through soil, soil temperature and how easily soil can be cultivated. When the structure is good, water infiltration into the soil is fast and soil granules are durable (spherical in shape). A soil with good structure absorbs enough water for plant growth, but extra water moves quickly away in large pores. In dry conditions, capillary water movement from deeper layers to the root zone is important. Other characteristics of a well-structured soil are high biological activity, good root growth and good bearing capacity. [1]
Individual soil particles, the way they are assembled as aggregates and soil pores between them define the soil structure. Clay particles and some humus substances play an important role in the formation of granular structure and electric charges also play a role. [1]