The study looked at how soil changes during plant growth on a volcanic island. They found that as plants grow, the soil becomes less dense and holds more water. The soil also becomes more acidic, can hold more nutrients, and has more carbon and nitrogen. Forests have the best soil quality, with more organic matter and nutrients than grasslands or shrublands. Overall, the research shows that as plants grow, the soil gets better, showing a strong link between plant growth and soil health on bare land.