IELTS8-TASK1-main reasons why agricultural land become lesson productive.
The pie chart below shows the main reasons why agricultural land become lesson productive. The table shows how these causes affected three regions of the world during the 1990s.
The pie chart gives figures on principal causes contributing to make farmable land degraded while the table presents how three continents were adversely affected by these reasons within 1990 to 2000.
Over-grazing, deforestation and over-cultivation are the most important phenomena accounting for more than 90% of soil degradation all over the world, with 35%, 30% and 28%, respectively. A mere of 7% results from other reasons such as reduction of annual rainfall, off-roading and so on.
This pattern is more or less identical to Oceania so that over-grazing was by far the first land-degrading factor with 11.3%, whereas over-cultivation had no any contribution there. In contrast, deforestation was the dominant item resulting in land degradation by 9.8% in Europe while over-cultivation constituted 3.3% as the most significant reason which degrades the farmable land in North America.
Europe suffered from a massive percentage of soil degradation by almost one quarter of its whole ground, South Pacific consisted half of the Europe proportion approximately (13%) and distantly third was North America with merely 5%.
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