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 the 1990s.

The given pie-chart delineates the factors which affect negatively the productivity of agricultural lands and the table elaborates on the indicators of

land

degradation

in three areas of the world

according to

mentioned factors in1990s

Overall

, the apparent fact is that the reason for the less productivity is over-grazing ,

in

addition

Add the comma(s)

,addition

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the percentage of

land

degradation

was apex in Europe in the 1990s. First and foremost, the predominant logic of

land

degradation

is over-grazing nearly 35%,

nevertheless

,deforestation fell into the second main reason with only 5 per cent behind.

Also

, over-cultivation stood at 28%,

besides

the indicators for other categories is 7%.

On the other hand

, the high points of

land

degradation

occurred in Europe in the 1990s roughly 23%. The main basis for

land

degradation

was deforestation 9.8% compared to others. For Oceania and North ,America these indicators were respectively 13% and 5% during

this

period. The noticeable feature was that over-cultivation had not any impact ,

in contrast

, the over-grazing effect had an apex of 11.3% in Oceania.