Why do rainforest soil not keep nutrients after tree are cut down?

Rainforest soils often lack sufficient nutrients because they are primarily composed of weathered minerals and organic matter that quickly decomposes in the warm, humid environment. When trees are cut down, the protective canopy is removed, leading to increased erosion and leaching of nutrients by rainfall. Additionally, the loss of organic matter from the trees and other vegetation means that the soil's nutrient replenishment is severely diminished. As a result, these soils can become depleted and less fertile, making it challenging for new vegetation to thrive.