hydration value

例句：

1. 1. The hydration value of the soil is an important factor in determining its fertility.
   土壤的水化值是决定其肥力的一个重要因素。
2. 2.The plant's ability to absorb water depends on its hydration value.
   植物吸收水分的能力取决于它的水化值。
3. 3.The researcher found that the hydration value of the soil was significantly affected by the rainfall.
   研究人员发现，土壤的水化值受到降雨量显著影响。