What does soil structure refer to?

Soil structure specifically refers to the arrangement and organization of soil particles into aggregates or clusters, which can vary in size, shape, and stability. This aggregation is crucial because it affects the soil's porosity, permeability, and overall ability to support plant growth and manage water and air movement.

Good soil structure allows for better root development and enhances the interaction of soil with nutrients and microorganisms, which is vital for healthy ecosystems. Therefore, understanding soil structure is essential for effective land management, particularly in contexts such as onsite wastewater systems, where the ability of soil to filter and treat effluent is directly influenced by how soil particles are organized.

The other options focus on different aspects of soil. While mineral composition, water content, and temperature all play significant roles in soil health, they do not define soil structure itself. Instead, they contribute to the overall characteristics and functionality of the soil.