With the process of the sandy desertification in grassland, the contents of clay decreased.
随着草原沙漠化的加剧，土壤粘粒含量趋于减少，砂粒增多。
The regional classification and distribution, formation process and developing trends of sandy and water eroding desertification are discussed mainly in this paper.
本文仅对北方沙质荒漠化、水蚀荒漠化两种主要的荒漠化类型的区域地质分布、成因及其发展趋势进行探讨。
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