The pie chart 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 pie chart given provides information about the percentages of causes that make

land

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barren. The table illustrates how three different areas were affected by these causes in the 1990s.

Overall

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,

it is clear that

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over–grazing

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overgrazing

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is the biggest reason for being infertile,

while

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in Europe

land

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degradation is totally higher than other degradation rates. Moving to a detailed analysis, the figure for over-grazing accounted for almost one–third of the total, with over-cultivation representing 28%. In terms of the indicator of

deforestation

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and others,

deforestation

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indicated 30%,

while

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others were just under one-tenth. Turning to the table, in North America, the proportion of

land

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degraded was the lowest at 5%, with

deforestation

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, over-cultivation, and over-grazing constituting 0.2%, 3.3%, and 1.5% respectively. In comparison, in Europe, the most considerable share of

land

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was degraded at just over one-fifth, and the corresponding figures for Europe were responsible for 9.8%, 7.7%, and 5.5% of the total in turn. With regard to the rates for Oceania, that for

deforestation

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was 1.7%, with over-grazing forming 11.3% of all,

totaling

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totalling

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13%.

However

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, there is no

land

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degradation

that is

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caused by

over-cutivation

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over-cultivation

.