Friable (adjective)

1. Easily crumbled or pulverized.
2. Easily crumbled or pulverized, usually referring to soil, rock or other natural materials, and also used to describe other materials that can be easily broken up or reduced to smaller pieces.

Origin:

From the latin fricare "to rub".

Examples:

1. The soil was too friable to support the weight of the building.
2. The rock was friable and easily broken.
3. The soil was too dry and friable for planting.
4. He noticed that the soil was friable.
5. The clay was too friable for pottery.