indigometer

例句：

1. 2.
   用于测量土壤湿度的
2. 3.
   用于测量土壤酸碱度的
3. 1.The indigometer was used to measure the soil moisture content.
   使用土壤湿度计来测量土壤湿度。
4. 2. The pH meter was used to determine the soil's acidity level.
   使用土壤pH计来确定土壤的酸碱度水平。
5. 3.The indigometer was used to monitor the growth of the plants in the greenhouse.
   使用土壤湿度计来监测温室中植物的生长情况。