But the structure of purple soil parent material 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；
The results showed that the principal factors affecting the metal background contents were landforms for plain area and soil parent material 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。
Mountainous area provides rich saccharoid for basin, which is important parent material of oasis soil formation.
山地为盆地提供了丰富的粒状物质，它们是绿洲土壤重要的成土母质；
The result showed that the tested trace elements had different distribution in different parent material profile and soil types. Red parent material had high content of total Zn.
结果表明：红土母质中全锌含量均高于黄土母质，全铜在不同亚类、不同母质黑土中含量分布变异较小；
Under the same parent material condition, urease activity was significantly correlated with forming time and maturity of soil.
在母质相同的情况下，脲酶活性高低又与成土时间的长短和土壤熟化程度呈正相关。
Which the soil was made and is called the parent material.
下面的亚土壤是土壤起始形成的地方，称为母质。
The contents and profile distributions of total Mn and available Mn of the dryland soil and paddy soil derived from the identical parent material were remarkably different.
同一母质发育的旱地土壤和水田土壤的全锰和有效锰含量在土壤剖面中的分布明显不同。
Soil Cu content primarily depend on its parent material.
土壤铜含量决定于母质类型。
Soil Cu content primarily depend on its parent material.
土壤铜含量决定于母质类型。
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