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 1900s

The bar pie chart depicts the major reason of what are

causes

of worldwide

land

degradation

and impacting on agricultural

land

which becomes less productive. The table illustrates the proportion of these three major reasons

land

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for land

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degradation

in 3 different countries during the 1990s.

Overall

the proportion of 3 major

causes

(over-grazing, deforestation, and over-cultivation) was around one third with only 7% of it being other

causes

. In 3 different countries, the percentage differs for each

causes

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cause

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. Europe is the one having the most

land

degraded about 23%, more than two-fifths compared to Oceania, and above one-fourth compared with North America. The main

causes

land

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of land

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degradation

in North America was over-cultivation,

while

in Europe is deforestation,

on the other hand

of these 2 countries, Oceania's major reason for

land

degradation

is overgrazing.