• 1. basic soil taxonomy: 土壤基层分类
• 2. soil basic taxonomy: 土壤基层分类

• 1.Using the taxonomy principles and methods of the basic units of World soil taxonomy, soil series in Chengdu Plain were divided.
  以国际土壤系统分类的基层单元的划分原理和方法，研究建立了成都平原的土系。
  dict.yoduao.com

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