The geographic distribution of regional soils such as loess soil, laterite soil andexpansive soil in China and their special engineering properties are briefly described in this paper.

文章论述了我国地区性土（黄土、红土和胀缩土）的地理分布和工程地质特性，分析了各类地区性土的物质成分和微结构特征以及它们的区域性变化规律。

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Laterite ores can be approximately divided into two categories: the limonite and the humus soil.

红土镍矿大致可分为褐铁矿型和腐植土型两类。

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It is typical strong structural soil with higher structural strength result from agglutination, and its pedogenic evolutionary process is similar to that of laterite.

胶结作用是其具有较高的结构强度的根本原因，成土演化过程与红土有着“亲缘”关系。

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