raw soil layer

例句：

1. 1. The farmers areconcerned about the health of the raw soillayer.
   农民们担心原始土壤层的健康状况。
2. 2.The research team found that the raw soillayer was rich in nutrients.
   研究团队发现原始土壤层富含养分。
3. 3. Thefarmer used a special methodto protect the raw soil layerfrom being disturbed.
   这位农民使用了一种特殊方法来保护原始土壤层不受干扰。