soil natural electric field

例句：

1. 1. The soil natural electric field is crucialfor plant growth.
   土壤自然电场对植物生长至关重要。
2. 2. The researcher found that thesoil natural electric field could affect the growthof crops.
   研究者发现，土壤自然电场会影响农作物的生长。
3. 3. The soil natural electric fieldplays a vital role in maintaining the balanceof ecosystems.
   土壤自然电场在维护生态系统平衡中起着重要作用。