The figure shows why agricultural land is become less productive

The pie chart illustrates the main reasons why agricultural properties providing less output. The table shows how these reasons affected three continents of the world which are North America, Europe, and Oceania during the 1990s Overall, it can be observed that overgazing was the biggest cause land degradation, while other reasons was minimum. Furthermore, Europe affected more as compare to other regions. In terms of Causes, The proportion of over-cultivation, and deforestation followed the same pattern between (28% - 30% respectively), and Over-grazing in agricultural land cause 35% degradation, only 7% was other reasons. Moreover, The proportion of Europe affected a lot around 23% in total, In addition, Over-grazing in Oceania affected nearly 11% however, over-cultivation did not affect that, In North America, The percentage of deforestation over-cultivation, over-grazing was 0. 2%, 3. 3% and 1. 5% consistently, which make 5% in total land degraded