dispersancy index

例句：

1. 1. The dispersancy index of the soil is an important factor in determining its fertility.
   土壤的分散指数是决定其肥力的一个重要因素。
2. 2.The dispersancy index of the pollen grains was measured to determine their size distribution.
   通过测量花粉颗粒的分散指数来测定它们的尺寸分布。
3. 3. The dispersancy index of the sedimentary rocks indicates the degree of compaction and weathering.
   沉积岩的分散指数表明了压实程度和风化程度。