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 1990s

The pie chart displays the particular reasons for the unproductiveness of agricultural farms. Whilst, the table illustrates how the three regions are affected by

land

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degradation

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during the period of 1990s. In general, over-grazing, deforestation, and

over-cultivation

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are the major causes of

land

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degradation

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on a global scale, but the motives behind less productive

land

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in several regions vary. During the period of 1990s, over-grazing of livestock was the most vital factor accounting for 35% of

land

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being affected by

this

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particular cause, followed by deforestation (30%),

over-cultivation

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of specific crops (28%), and the remaining 7% are made up by other factors.

Moreover

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,

Europe

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had the highest total of

land

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degraded accounting for 23% followed by Australia and New Zealand at about 13%, and the lowest was North

America

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in specific of total

land

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decreased was 5%. On

one

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the one

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hand, deforestation was the most significant factor in

land

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degradation

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in

Europe

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(9,8%) compared to Oceania (1,7%) and North

America

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(0,2%). In terms of

over-cultivation

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of certain crops was the main cause of

land

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degradation

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in

Europe

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accounting for 7.7%, compared to North

America

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(3.3%) and interestingly, there was no case of

land

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degradation

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caused by

over-cultivation

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in Oceania.

On

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In

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the

last

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region, the main cause of

land

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degradation

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in Oceania was over-grazing of livestock with a total of 11.3% of

land

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affected in

this

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way, followed by

Europe

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just about 5.5% and the least affected

of

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by

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over-grazing in

land

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degradation

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was North

America

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about 1.5% of total

land

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affected.