Which of the following does not contribute to a soil's texture?

Soil texture is determined by the relative proportions of different particle sizes, which include sand, silt, and clay. Each of these components varies in size and contributes distinctly to the overall texture of the soil.

Clay particles are the smallest, providing the soil with the ability to retain moisture and nutrients. Sand particles, on the other hand, are larger and contribute to drainage and aeration within the soil. Silt particles, which are intermediate in size, offer a balance between water retention and drainage.

Mud-sized particles, although they may seem relevant, are not a specific classification in soil texture. Instead, the standard classifications focus on clay, sand, and silt. Since mud is a mixture and does not represent a distinct size category like the others, it does not directly impact soil texture in the way the other components do. Therefore, the option referring to mud-sized particles does not contribute to defining a soil's texture.