- Some of the best soils come from volcanic rock. The rock easily separates into component mineral parts because of weathering and chemical reactions with the atmosphere.
- Volcanic soil is an easily tillable and well-drained loam. Yet, it holds water well. It makes good pasturage and, climate allowing, is perfect for vineyards, citrus trees and vegetables of all kinds, especially tomatoes.
- Volcanic ash and lava can turn into fertile soil as early as several hundred years after it is ejected, where heavy rainfall and strong winds occur. This accounts for the lush growth of sugar cane and pineapples in Hawaii.