The inorganic soil constituent with the finest particles is clay.

Here's why:

* Soil Texture: Soil texture refers to the relative proportions of sand, silt, and clay particles in a soil sample.

* Particle Size: Clay particles are the smallest, with diameters less than 0.002 millimeters.

* Properties: Clay particles have a large surface area, which allows them to hold onto water and nutrients more effectively than sand or silt. This also makes them sticky and cohesive.

Let me know if you have any other questions about soil!