The pie chart illustrates major factors that make agricultural land productivity decrease. While, the table describes the affection of the causes in North America, Europe, and Oceania along 1990s.
Overall, the reasons of the worldwide lack of agricultural land were because of over-grazing for 35%,deforestation for 30%, over-cultivation for 28%, and 7% because of other causes. Those happened in 1990s with the highest total rate of degraded land was in Europe, followed by Oceania, then North America.
In North America, the most reason of land reduction was over-cultivation, the second was over-grazing, and the last was deforestation. The total land degraded was 5%.
A little bit higher than North America land degradation rate was in Oceania that reached 13% with the most causes were over-grazing, then deforestation. Over-cultivation did not become a reason of land degraded in this area.
Moreover, Europe total lack of agricultural land was the highest rate than the others. It rose 23% with the main cause was because of deforestation. Meanwhile, over-cultivation and over-grazing were the second and third reason. They both rate higher than in North America and Oceania.
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