But the structure of purple soilparentmaterial is loose and easy to efflorescent, anti-erodibility;
但紫色土成土母岩结构疏松,易风化,抗蚀性低;
2
The results showed that the principal factors affecting the metal background contents were landforms for plain area and soilparentmaterial for mountain area.
分析结果表明,影响土壤元素背景值的主要因素,在平原地区是地貌条件,在山区是成土母质。
3
Mountainous area provides rich saccharoid for basin, which is important parentmaterial of oasis soil formation.