True or False: Sand has more adsorptive sites than clay.

In understanding soil composition, it's crucial to consider the properties of sand and clay. Clay particles are much smaller and have a greater surface area relative to their volume compared to sand particles. This larger surface area provides clay with significantly more adsorptive sites, enabling it to hold onto nutrients and water more effectively.

While sand has larger particles and tends to have lower surface area and thus fewer adsorptive sites, clay's fine texture allows it to bind with and retain a greater variety of ions and molecules, including water and essential nutrients for plants. Consequently, the statement that sand has more adsorptive sites than clay is false, as clay’s structure and size make it highly effective in this regard.

Additionally, the presence of organic matter and soil moisture can influence adsorption, but they do not fundamentally alter the fact that clay has inherently more adsorptive sites than sand. Therefore, the correct answer accurately reflects this understanding of soil properties.