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

The two charts give information about the percentage of the principal causes in the agricultural sector which influenced its productivity and their influences in three different world regions during the 1990s.

Overall

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, the major problems found in agricultural

land

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were caused by over-grazing,

deforestation

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and

over-cultivation

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whose effects were mainly encountered in Europe.

To begin

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with, over-grazing and

deforestation

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caused more than a half of soil

degradation

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, which made up 65% of

degradation

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with 35% in the former and 30% in the latter. Compared to

over-cultivation

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, it accounted for 28%, making it 2% lower than

deforestation

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and became the third main cause of

land

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degradation

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.

Furthermore

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, there was only a tiny fraction of other crux which caused

this

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issue. In terms of its impacts on different regions, North America encountered 0.2% of

deforestation

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, 3.3% of

over-cultivation

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, and 1.5 of

over grazing

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overgrazing

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with 5% of total

land

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degraded. Meanwhile, the European continent suffered from 9.8%, 7.7%, and 5.5% of

deforestation

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,

over-cultivation

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, and over-grazing,

subsequently

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, making it the widest

land

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degraded at 23% in total. Another part was Oceania which only faced

deforestation

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and over-grazing at 1.7% and 11.3%, respectively. There was 13% of total soil

degradation

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in

this

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area.