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

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pie chart depicts the factors of how agricultural lands become less productive. The table below illustrates the 3 regions that were affected by these causes in the 1990s. It is clear to notice that over-grazing, deforestation, and

over-cultivation

contributed the most to

the

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worldwide land degradation and in comparison, with North America and Oceania, Europe suffered the most because of it during the 1990s. As can be seen from the pie chart over-grazing was the main reason for less productivity with over one third.

In addition

to that, deforestation and

over-cultivation

also

made up the biggest part of the chart with only

2

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a 2

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% difference. The figures were 30% and 28% respectively. North America had the least land degraded

at the end

of the 20th century with

over-cultivation

affecting the most with 3.3%.In comparison with North America, in Oceania, the amount of land reduced was higher,

however

over-grazing was the contributory factor for it with 11.3% when

over-cultivation

was equivalent to 0%.