What size is clay compared to silt?

Clay particles are significantly smaller than silt particles in terms of soil texture classification. The particle size distribution classifies clay as having a diameter of less than 0.002 millimeters, while silt particles range from 0.002 to 0.05 millimeters in diameter. This difference means that clay consists of incredibly fine particles that can feel smooth and hold water effectively, while silt particles are larger and feel more powdery. The distinction in size is fundamental in understanding soil properties and behaviors, including drainage, nutrient retention, and the soil's capacity to support plant growth. Knowing these size relationships is crucial for soil evaluators in assessing soil composition and suitability for various uses.