The question is 'what happen when a land has been overfarmed or overgrazed. The answer is desertification. Overgrazing and overfarming occur when a land has been exposed to intensive farming or grazing over a long period of time. This drastically reduces the productivity and the fertility of the land leading to desertification, which is the process by which a fertile land become a desert as a result of inappropriate agricultural practices or deforestation.
