In ecology, overgrazing occurs when plants are exposed to grazing for too long, or without sufficient recovery periods. It is one cause of desertification and erosion. Overgrazing is also seen as one cause of the spread of non-native plants.
... from 45 to 64, and 9.6% who are 65 years of age or older. The median age is 35 years. For every 100 females there are 96.9 males. For every 100 females age 18 and ...