mature soil造句

• Soil caco3 eluviation and deposition process is the most important development and evolution process of soil , from parent material to mature soil in the loess plateau , arid and semiarid area
  土壤碳酸钙( caco _ 3 )的淋溶淀积过程是黄土高原以及干旱和半干旱地区土壤形成发育的主要过程之一，也是地球化学过程的主要内容。