Karst rocky desertification is a major kind of land desertification.

喀斯特石漠化是土地荒漠化的主要类型之一。

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Widespread distributed pure carbonate rock is the basis on which stony desertification formed while relief and vegetation retrogression process can also promote desertification.

广泛分布的纯碳酸岩是形成石漠化的基础，地貌植被退化过程也可促进石漠化。

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Desertification changing trend is that the desertification land area expanded and desertification degree reduced.

变化趋势是沙漠化面积增加，程度减轻。

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The desertification process also threatens Timbuktu's many ancient earth buildings.

VOA: special.2009.04.22

The other countries represented at the conference include African nations such as Kenya,Rwanda and Tanzania, which face the threat of desertification.

VOA: standard.2009.11.09

For example,it says climate change and land use are expected to increase desertification worldwide, increasing the risk of sand and dust storms.

VOA: standard.2009.03.23

Consider the history of Lake Chad as an ecample of the desertification problem in the region.

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In Kazakhstan desertification has meant that nearly 50 percent of cropland has been abandoned since 1980.

CNN: Desertification: How to stop the shifting sands

The other two Rio conventions, on biological diversity and combating desertification, have proved equally disappointing.

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