The pie chart below shows the main reasons why agricultural land becomes less productive. The table shows how these causes affected three regions of the world during the 1990s.

The graph illustrates the major reasons that caused rural area soil to become infertile across three distinguished territories of the world during the 1990s. One of the striking features is that over-grazing was the leading cause of land degradation worldwide

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, other factors accounted for the smallest proportion. Among the three regions, Europe recorded the highest percentage of degraded land,

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North America was affected the least.

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, data across the research shows that over-grazing was responsible for the highest ratio at 35%, followed by deforestation and over-cultivation at 30% and 28%, respectively.

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, additional influences contributed by just 7%. In terms of territorial causes, Europe tops the list, with 23% of its agricultural land degraded, mainly

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deforestation 9.8% and over-cultivation 7.7%. Oceania remained

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at a total of 13%, with over-grazing accounting for the vast majority of degradation at 11.3%,

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North America witnessed the least degradation

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, barely 5%, most of which resulted from over-cultivation at 3.3%.