Much attention on the use of the expansive soil has been paid because of the special engineering characteristics and morphology and the damage effects as well.
膨胀土因在形貌和工程性质上的特殊性和破坏作用的严重性，引起了广泛的重视。
The varied types of landform and remarked difference of soil distribution in southwest karst mountainous areas are influenced by the topographical morphology.
西南岩溶山区地貌类型多样、土壤的分布差异明显，受控于地貌形态。
Root morphology and distribution have an important influence on the absorption of water and nutrients in soil.
根系形态和分布对土壤中养分和水分的吸收有重要影响。
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