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 pie chart depicts the significant causes of being less prolific of farmland. The table compares how the three parts of the world were influenced by these causes in the 1990s. It can be seen that one of the most significant reasons for

this

circumstance was over-grazing.

In addition

, more lands were degraded in

Europe

due to

deforestation

,

over-cultivation

, and overgrazing.

According to

the bar chart, agricultural lands were decreased by three major activities which over-grazing had the highest percentage, with 35% among them. After that

deforestation

affected lands negatively by just a little less than a third.

Over-cultivation

was disruptive at about a quarter. Looking at the table, over the 1990s there were three great sectors of the world which caused land degradation, North America,

Europe

, and Oceania impacted 5%, 23%, and 13% respectively.

Europe

had a dramatic effect on

this

phenomenon with 9.8 %

deforestation

, 7.7%

over-cultivation

, and 5.5 % over-grazing.

Whereas

North America had a minor influence with 0.2%

deforestation

, 3.3%

over-cultivation

, and 1.5% over-grazing. Oceania region held second place after

Europe

despite lacking

over-cultivation

.