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.

Task Achievement

Band 8.0

Coherence and Cohesion

Band 7.5

Lexical Resource

Band 7.0

Grammatical Range and Accuracy

Band 6.5

The given pie chart and table depict the significant causes of less productivity of agricultural land in three parts of the world in the 1990s. As is observed from the pie chart, the main reason for land degradation around the globe is due to over-grazing.