What is the relationship between soil structure and fertility?

Soil structure refers to the arrangement of soil particles and the spaces between them, which significantly impacts various soil functions. When soil has good structure, it typically features aggregated particles that create pores and spaces necessary for air and water movement. This improved aeration facilitates root respiration, as roots require oxygen for growth and metabolic processes.

Additionally, well-structured soil enhances water infiltration, which is crucial for maintaining soil moisture and preventing runoff. Proper moisture levels support the biological activity in the soil, which in turn aids nutrient cycling and makes essential nutrients more available to plants.

Furthermore, a good soil structure allows for deeper root penetration, enabling plants to access water and nutrients more efficiently. In summary, good soil structure directly contributes to higher fertility by promoting aeration, water infiltration, and nutrient availability, making option B the most accurate choice in this context.