Whereas the given diagram displays the main causes of agricultural land degradation, the table represents data about impact of the aforementioned reasons to North America, Europe and Oceanida in 1990s.

The pie chart highlights the primary factors contributing to the degradation of agricultural

land

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,

while

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the accompanying table provides information about the effects of those causes on three continents during the 1990s.

Overall

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, over-grazing,

over-cultivation

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and deforestation are the main causes of agricultural

land

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degradation with over-grazing being particularly dominant. Among the regions, Europe has experienced the highest percentage of declining

land

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productivity, whilst North America was the least affected.

To begin

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with, the diagram revealed that over-grazing was the leading contributor, accounting for 35% of the total. Deforestation followed at 30%,

while

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over-cultivation

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was responsible for 28%. Other reasons collectively made up the remaining 7%, suggesting they had a relatively minor influence in comparison. The table shows that Europe had the most significant damage by losing the quality level of

land

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by 23%. Deforestation was the essential issue contributed by 9.8%, followed by

over-cultivation

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7.7% and over-grazing 5.5%.

In contrast

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, Oceania had a total of 13% devastation on soil, predominantly

due to

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over-grazing 11.3%, as

over-cultivation

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was not a used process in

this

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region. North America had the lowest rate at 5%, with

over-cultivation

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being the main one

3.3

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%.