The ways in which earthworms perform as bioindicators of soil pollution are reviewed as follows: (1) Earthworm population in contaminated sites reflects the degree of soil pollution as a whole;

RESULTS and CONCLUSION The quality of water and soil and the degree of pollution affect the quality of Ling-Zhi products directly.

Sometimes, if you do not implement the soil and groundwater survey, can not determine the degree of pollution and the extent of pollution.