What term describes the arrangement of soil particles into aggregates that influences porosity and water movement?

• A. Colour
• B. Texture
• C. Structure
• D. pH

Answer: (C)

Soil structure is about how soil particles bond into clumps, or aggregates, and how those aggregates are arranged in the soil. This arrangement creates pore spaces that control how air and water move through the soil. A well-structured soil has a mix of larger pores that allow quick infiltration and drainage, along with smaller pores that hold water available to plants. Because of this arrangement, porosity and the pattern of water movement are closely tied to soil structure. Colour, texture, and pH describe other soil attributes: colour indicates minerals and organic matter, texture is the size distribution of individual particles, and pH reflects acidity or alkalinity affecting chemical reactions. The term that best captures the arrangement into aggregates and its impact on porosity and water movement is soil structure.