What are the ways in which soil may lost?

Erosion is the major reason. This can be caused by wind, water and glaciers. Deforestation is where people dig up too many trees and overgrazing is where people dig up their crops all at one time and these processes can cause the wind to take it away easily. The wind blows dirt and soil easily and "hopping is where soil hits other soil on the ground as it is blowing and it bounces it up, causing much soil to be blown away. Water erosion is caused either by rain where it washes it away, or rivers, (specificly meandering stream), streams that have lots of turns and erosion occurs on the outer part of the turns, and this is how rivers get larger. Glaciers also pick up a lot of soil as they grind along the earth and once it gets low enough so that it melts, rocks and soil is deposited at that spot. (I just did a research project!).