Soil has chemical AND physical properties……..When we talk about soil tilth, a lot of that (not all) revolves around the physical properties. Properly functioning soil needs structure just like the framework of a house. It’s the actual arrangement and design of the components. If you run a wrecking ball through a house then you don’t have a house anymore…..you have a pile of wood. The same with soil…..without the structure you just have a pile of wood otherwise called dirt……That’s not soil.