Farmers could not farm a field for one year, or you could do something to help control flooding. You can also put ditches around the field to catch the eroded soil. Soil erosion's are caused when...
There are many things which cause erosion, and far more which don't. Compare your question to: "How many animals on earth are not chickens?". I can speculate as to what you mean, and provide a...
Mostly what prevents erosion is the roots of various plants grabbing hold of the dirt and holding it in place, what makes plants difficult to pull out of the ground also keeps the soil from washing...