Question

Explain how overgrazing encourages a greater amount of soil erosion.

Answer 1

Overgrazing encourages a greater amount of soil erosion through three distinct stages:

1. Loss of Protective Vegetation: Livestock eat grass down to the roots, completely stripping the land of its protective green cover. Without this vegetation, the bare topsoil is left completely exposed to the direct forces of scorching sun, strong winds, and heavy rainfall.
2. Soil Compaction by Hooves: The constant trampling by heavy animals stresses the soil structure, compressing the particles closely together. This removes microscopic air pockets from the earth, preventing the soil from absorbing rainwater and significantly increasing surface water runoff.
3. Root Destruction and Washing Away: Animals trample and pull on the remaining plants, damaging and loosening the underground root systems that physically hold the earth together. When heavy rains fall, the loose, unanchored topsoil is easily washed away by the quickly moving runoff water.