采用比较研究法和辅以定点追踪观测，研究了四川盆地丘陵区几种主要紫色土退化的微形态特征。
The micromorphology of main kinds of degradated purple soils in the hilly area, Sichuan Basin, have been revealed by contrasting with normal soils and trace researching in the same site.
本文以四川盆地中部丘陵区的典型代表内江市为研究对象。
Neijiang city was selected as the research object, which was a typical regional case of central hill district of Sichuan basin.
县境四周环山，境内地形多样，中南部为低山丘陵区，东部、北部山多谷深，西部为山间盆地。
County surrounded by mountains, the territory of diverse terrain, for the south-central hilly areas in the eastern and northern mountainous deep valley, the mountains to the west basin.
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