How do volcanic ash deposits affect mountain soil fertility?

While volcanic ash deposits can cause immediate, short-term damage to mountain ecosystems—such as crop failure and physical destruction—they are highly beneficial to soil fertility in the long term.1

Volcanic ash serves as a vital parent material for soil formation. As the ash decomposes over time, it releases essential nutrients into the ground. This process is responsible for the development of some of the most fertile soils found anywhere in the world. Because these deposits can be continually replenished by volcanic activity, they play a significant role in shaping the mineralogical composition and long-term productivity of the landscape.21