True or False: Clay dominant soils filter and percolate slower than sandy soils.

• A. True
• B. False
• C. Only when saturated
• D. Depends on soil temperature

Answer: (A)

Clay dominant soils filter and percolate water slower than sandy soils due to their texture and particle size. Clay particles are much smaller and more densely packed than those found in sandy soils. This compact nature of clay results in less space for water to flow through, causing water to move more slowly. Additionally, clay has a higher water retention capacity, leading it to hold onto moisture for longer periods, which further reduces the rate at which water can percolate through it.

In contrast, sandy soils have larger particles and more porous structures, allowing water to move through them quickly. This faster percolation is advantageous in many gardening and landscaping scenarios, especially where drainage is a concern. The difference in how these soil types manage water is fundamental in landscape design, particularly when considering irrigation and drought conditions. This characteristic of clay soils is critical for anyone working in water-efficient landscaping to understand, as it directly affects plant health and irrigation strategies.