What is soil structure?

• A. The chemical composition of soil
• B. The arrangement of soil separates into aggregates
• C. The moisture content of soil
• D. The biological life within soil

Answer: (B)

Soil structure refers to the arrangement of soil separates, such as sand, silt, and clay, into aggregates. These aggregates can take various forms, including clumps and granules, which affect how air, water, and nutrients move through the soil. Good soil structure promotes healthy root development and enhances the soil's ability to retain moisture and nutrients, making it an essential aspect of maintaining effective landscapes.

Understanding soil structure is crucial for water-efficient landscaping because it influences how well water can infiltrate the soil, how quickly it drains, and how much moisture is retained. This knowledge is foundational for implementing practices that enhance water conservation in landscaping, such as selecting appropriate plants based on their water needs and implementing suitable irrigation practices.

The other options, while related to soil, do not accurately define soil structure. The chemical composition pertains to the elements and compounds present in the soil, moisture content refers to the amount of water within the soil, and biological life encompasses all organisms living within the soil. Each of these components plays a role in the overall health of soil but does not directly describe its structure.