indentation index

例句：

1. 1. The indentation index of the soil is an important factor in determining its fertility.
   土壤的压痕指数是决定其肥力的一个重要因素。
2. 2. The indentation index of the soil can be used to predict crop yields.
   土壤的压痕指数可以用来预测农作物产量。
3. 3. The indentation index of the soil is closely related to the growth of plants.
   土壤的压痕指数与植物的生长密切相关。